Merge branch 'dev' into prova

Reviewed-on: #12

.gitea/workflows/cicd.yaml

@@ -1,128 +0,0 @@
-name: Build, Test and Deploy
-
-on:
-  push:
-    branches: [main, int, dev]
-
-concurrency:
-  group: print-calculator-${{ gitea.ref }}
-  cancel-in-progress: true
-
-jobs:
-  test-backend:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up JDK 21
-        uses: actions/setup-java@v4
-        with:
-          java-version: '21'
-          distribution: 'temurin'
-
-      - name: Run Tests with Gradle
-        run: |
-          cd backend
-          chmod +x gradlew
-          ./gradlew test
-
-  build-and-push:
-    needs: test-backend
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set TAG + OWNER lowercase
-        shell: bash
-        run: |
-          if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
-            echo "TAG=prod" >> "$GITHUB_ENV"
-          elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
-            echo "TAG=int" >> "$GITHUB_ENV"
-          else
-            echo "TAG=dev" >> "$GITHUB_ENV"
-          fi
-
-          echo "OWNER_LOWER=$(echo '${{ gitea.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_ENV"
-
-      - name: Ensure docker CLI exists
-        shell: bash
-        run: |
-          if ! command -v docker >/dev/null 2>&1; then
-            apt-get update
-            apt-get install -y --no-install-recommends docker.io
-          fi
-          docker version
-
-      - name: Login to Gitea Registry
-        shell: bash
-        run: |
-          set -euo pipefail
-          printf '%s' "${{ secrets.REGISTRY_TOKEN }}" | docker login "${{ secrets.REGISTRY_URL }}" \
-            -u "${{ secrets.REGISTRY_USER }}" --password-stdin
-
-      - name: Build & Push Backend
-        shell: bash
-        run: |
-          BACKEND_IMAGE="${{ secrets.REGISTRY_URL }}/${{ env.OWNER_LOWER }}/print-calculator-backend:${{ env.TAG }}"
-          docker build -t "$BACKEND_IMAGE" ./backend
-          docker push "$BACKEND_IMAGE"
-
-      - name: Build & Push Frontend
-        shell: bash
-        run: |
-          FRONTEND_IMAGE="${{ secrets.REGISTRY_URL }}/${{ env.OWNER_LOWER }}/print-calculator-frontend:${{ env.TAG }}"
-          docker build -t "$FRONTEND_IMAGE" ./frontend
-          docker push "$FRONTEND_IMAGE"
-
-  deploy:
-    needs: build-and-push
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set ENV
-        shell: bash
-        run: |
-          if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
-            echo "ENV=prod" >> "$GITHUB_ENV"
-          elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
-            echo "ENV=int" >> "$GITHUB_ENV"
-          else
-            echo "ENV=dev" >> "$GITHUB_ENV"
-          fi
-
-      - name: Trigger deploy on Unraid (forced command key)
-        shell: bash
-        run: |
-          set -euo pipefail
-
-          apt-get update
-          apt-get install -y --no-install-recommends openssh-client
-
-          mkdir -p ~/.ssh
-          chmod 700 ~/.ssh
-
-          # 1) Prende il secret base64 e rimuove spazi/newline/CR
-          printf '%s' "${{ secrets.SSH_PRIVATE_KEY_B64 }}" | tr -d '\r\n\t ' > /tmp/key.b64
-
-          # 2) (debug sicuro) stampa solo la lunghezza della base64
-          echo "b64_len=$(wc -c < /tmp/key.b64)"
-
-          # 3) Decodifica in chiave privata
-          base64 -d /tmp/key.b64 > ~/.ssh/id_ed25519
-
-          # 4) Rimuove eventuali CRLF dentro la chiave (se proviene da Windows)
-          tr -d '\r' < ~/.ssh/id_ed25519 > ~/.ssh/id_ed25519.clean
-          mv ~/.ssh/id_ed25519.clean ~/.ssh/id_ed25519
-          chmod 600 ~/.ssh/id_ed25519
-
-          # 5) Validazione: se fallisce qui, la chiave NON è valida/corrotta
-          ssh-keygen -y -f ~/.ssh/id_ed25519 >/dev/null
-
-          # ... (resto del codice uguale)
-          ssh-keyscan -H "${{ secrets.SERVER_HOST }}" >> ~/.ssh/known_hosts 2>/dev/null
-
-          # Aggiungiamo le opzioni di verbosità se dovesse fallire ancora, 
-          # e assicuriamoci che l'input sia pulito
-          ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" "${{ env.ENV }}"

.gitea/workflows/deploy.yaml

@@ -0,0 +1,209 @@
+name: Build and Deploy
+
+on:
+  push:
+    branches: [main, int, dev]
+
+concurrency:
+  group: print-calculator-deploy-${{ gitea.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test-backend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: "21"
+          distribution: "temurin"
+          cache: gradle
+
+      - name: Run Tests with Gradle
+        run: |
+          cd backend
+          chmod +x gradlew
+          ./gradlew test
+
+  test-frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node 22
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: "npm"
+          cache-dependency-path: "frontend/package-lock.json"
+
+      - name: Install Chromium
+        shell: bash
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends chromium
+
+      - name: Install frontend dependencies
+        shell: bash
+        run: |
+          cd frontend
+          npm ci --no-audit --no-fund
+
+      - name: Run frontend tests (headless)
+        shell: bash
+        env:
+          CHROME_BIN: /usr/bin/chromium
+          CI: "true"
+        run: |
+          cd frontend
+          npm run test -- --watch=false --browsers=ChromeHeadlessNoSandbox
+
+  build-and-push:
+    needs: [test-backend, test-frontend]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set TAG + OWNER lowercase
+        shell: bash
+        run: |
+          if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
+            echo "TAG=prod" >> "$GITHUB_ENV"
+          elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
+            echo "TAG=int" >> "$GITHUB_ENV"
+          else
+            echo "TAG=dev" >> "$GITHUB_ENV"
+          fi
+
+          echo "OWNER_LOWER=$(echo '${{ gitea.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_ENV"
+
+      - name: Ensure docker CLI exists
+        shell: bash
+        run: |
+          if ! command -v docker >/dev/null 2>&1; then
+            apt-get update
+            apt-get install -y --no-install-recommends docker.io
+          fi
+          docker version
+
+      - name: Login to Gitea Registry
+        shell: bash
+        run: |
+          set -euo pipefail
+          printf '%s' "${{ secrets.REGISTRY_TOKEN }}" | docker login "${{ secrets.REGISTRY_URL }}" \
+            -u "${{ secrets.REGISTRY_USER }}" --password-stdin
+
+      - name: Build & Push Backend
+        shell: bash
+        run: |
+          BACKEND_IMAGE="${{ secrets.REGISTRY_URL }}/${{ env.OWNER_LOWER }}/print-calculator-backend:${{ env.TAG }}"
+          docker build -t "$BACKEND_IMAGE" ./backend
+          docker push "$BACKEND_IMAGE"
+
+      - name: Build & Push Frontend
+        shell: bash
+        run: |
+          FRONTEND_IMAGE="${{ secrets.REGISTRY_URL }}/${{ env.OWNER_LOWER }}/print-calculator-frontend:${{ env.TAG }}"
+          docker build -t "$FRONTEND_IMAGE" ./frontend
+          docker push "$FRONTEND_IMAGE"
+
+  deploy:
+    needs: build-and-push
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set ENV
+        shell: bash
+        run: |
+          if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
+            echo "ENV=prod" >> "$GITHUB_ENV"
+          elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
+            echo "ENV=int" >> "$GITHUB_ENV"
+          else
+            echo "ENV=dev" >> "$GITHUB_ENV"
+          fi
+
+      - name: Setup SSH key
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          apt-get update
+          apt-get install -y --no-install-recommends openssh-client
+
+          mkdir -p ~/.ssh
+          chmod 700 ~/.ssh
+
+          printf '%s' "${{ secrets.SSH_PRIVATE_KEY_B64 }}" | tr -d '\r\n\t ' > /tmp/key.b64
+          echo "b64_len=$(wc -c < /tmp/key.b64)"
+
+          base64 -d /tmp/key.b64 > ~/.ssh/id_ed25519
+
+          tr -d '\r' < ~/.ssh/id_ed25519 > ~/.ssh/id_ed25519.clean
+          mv ~/.ssh/id_ed25519.clean ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+
+          ssh-keygen -y -f ~/.ssh/id_ed25519 >/dev/null
+
+          ssh-keyscan -H "${{ secrets.SERVER_HOST }}" >> ~/.ssh/known_hosts 2>/dev/null
+
+      - name: Write env and compose to server
+        shell: bash
+        run: |
+          if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
+            DEPLOY_TAG="prod"
+          elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
+            DEPLOY_TAG="int"
+          else
+            DEPLOY_TAG="dev"
+          fi
+          DEPLOY_OWNER=$(echo '${{ gitea.repository_owner }}' | tr '[:upper:]' '[:lower:]')
+
+          cat "deploy/envs/${{ env.ENV }}.env" > /tmp/full_env.env
+
+          if [[ "${{ env.ENV }}" == "prod" ]]; then
+            DB_URL="${{ secrets.DB_URL_PROD }}"
+            DB_USER="${{ secrets.DB_USERNAME_PROD }}"
+            DB_PASS="${{ secrets.DB_PASSWORD_PROD }}"
+          elif [[ "${{ env.ENV }}" == "int" ]]; then
+            DB_URL="${{ secrets.DB_URL_INT }}"
+            DB_USER="${{ secrets.DB_USERNAME_INT }}"
+            DB_PASS="${{ secrets.DB_PASSWORD_INT }}"
+          else
+            DB_URL="${{ secrets.DB_URL_DEV }}"
+            DB_USER="${{ secrets.DB_USERNAME_DEV }}"
+            DB_PASS="${{ secrets.DB_PASSWORD_DEV }}"
+          fi
+
+          printf '\nDB_URL="%s"\nDB_USERNAME="%s"\nDB_PASSWORD="%s"\n' \
+            "$DB_URL" "$DB_USER" "$DB_PASS" >> /tmp/full_env.env
+
+          printf 'REGISTRY_URL="%s"\nREPO_OWNER="%s"\nTAG="%s"\n' \
+            "${{ secrets.REGISTRY_URL }}" "$DEPLOY_OWNER" "$DEPLOY_TAG" >> /tmp/full_env.env
+
+          ADMIN_TTL="${{ secrets.ADMIN_SESSION_TTL_MINUTES }}"
+          ADMIN_TTL="${ADMIN_TTL:-480}"
+          printf 'ADMIN_PASSWORD="%s"\nADMIN_SESSION_SECRET="%s"\nADMIN_SESSION_TTL_MINUTES="%s"\n' \
+            "${{ secrets.ADMIN_PASSWORD }}" "${{ secrets.ADMIN_SESSION_SECRET }}" "$ADMIN_TTL" >> /tmp/full_env.env
+
+          echo "Preparing to send env file with variables:"
+          grep -Ev "PASSWORD|SECRET" /tmp/full_env.env || true
+
+          ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" \
+            "setenv ${{ env.ENV }}" < /tmp/full_env.env
+
+          ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" \
+            "setcompose ${{ env.ENV }}" < docker-compose.deploy.yml
+
+      - name: Trigger deploy on Unraid (forced command key)
+        shell: bash
+        run: |
+          set -euo pipefail
+          ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" "deploy ${{ env.ENV }}"

.gitea/workflows/pr-checks.yaml

@@ -0,0 +1,172 @@
+name: PR Checks
+
+on:
+  pull_request:
+    branches: [main, int, dev]
+
+concurrency:
+  group: print-calculator-pr-${{ gitea.ref }}
+  cancel-in-progress: true
+
+jobs:
+  prettier-autofix:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node 22
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+
+      - name: Apply formatting with Prettier
+        shell: bash
+        run: |
+          npx --yes prettier@3.6.2 --write \
+            "frontend/src/**/*.{ts,html,scss,css,json}" \
+            ".gitea/workflows/*.{yml,yaml}"
+
+      - name: Commit and push formatting changes
+        shell: bash
+        run: |
+          if git diff --quiet; then
+            echo "No formatting changes to commit."
+            exit 0
+          fi
+
+          if ! command -v jq >/dev/null 2>&1; then
+            apt-get update
+            apt-get install -y --no-install-recommends jq
+          fi
+
+          EVENT_FILE="${GITHUB_EVENT_PATH:-}"
+          if [[ -z "$EVENT_FILE" || ! -f "$EVENT_FILE" ]]; then
+            echo "Event payload not found, skipping auto-push."
+            exit 0
+          fi
+
+          HEAD_REPO="$(jq -r '.pull_request.head.repo.full_name // empty' "$EVENT_FILE")"
+          BASE_REPO="$(jq -r '.repository.full_name // empty' "$EVENT_FILE")"
+          PR_BRANCH="$(jq -r '.pull_request.head.ref // empty' "$EVENT_FILE")"
+
+          if [[ -z "$PR_BRANCH" ]]; then
+            echo "PR branch not found in event payload, skipping auto-push."
+            exit 0
+          fi
+
+          if [[ -n "$HEAD_REPO" && -n "$BASE_REPO" && "$HEAD_REPO" != "$BASE_REPO" ]]; then
+            echo "PR from fork ($HEAD_REPO), skipping auto-push."
+            exit 0
+          fi
+
+          git config user.name "printcalc-ci"
+          git config user.email "ci@printcalculator.local"
+
+          git add frontend/src .gitea/workflows
+          git commit -m "style: apply prettier formatting"
+          git push origin "HEAD:${PR_BRANCH}"
+
+  security-sast:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Install Python and Semgrep
+        shell: bash
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends python3 python3-pip
+          python3 -m pip install --upgrade pip
+          python3 -m pip install semgrep
+
+      - name: Run Semgrep (SAST)
+        shell: bash
+        run: |
+          semgrep --version
+          semgrep --config auto --error \
+            --exclude frontend/node_modules \
+            --exclude backend/build \
+            backend/src frontend/src
+
+      - name: Install Gitleaks
+        shell: bash
+        run: |
+          set -euo pipefail
+          VERSION="8.24.2"
+          curl -sSL "https://github.com/gitleaks/gitleaks/releases/download/v${VERSION}/gitleaks_${VERSION}_linux_x64.tar.gz" \
+            -o /tmp/gitleaks.tar.gz
+          tar -xzf /tmp/gitleaks.tar.gz -C /tmp
+          install -m 0755 /tmp/gitleaks /usr/local/bin/gitleaks
+          gitleaks version
+
+      - name: Run Gitleaks (secrets scan)
+        shell: bash
+        run: |
+          set +e
+          gitleaks detect --source . --no-git --redact --exit-code 1 \
+            --report-format json --report-path /tmp/gitleaks-report.json
+          rc=$?
+          if [[ $rc -ne 0 ]]; then
+            echo "Gitleaks findings:"
+            cat /tmp/gitleaks-report.json
+          fi
+          exit $rc
+
+  test-backend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: "21"
+          distribution: "temurin"
+          cache: gradle
+
+      - name: Run Tests with Gradle
+        run: |
+          cd backend
+          chmod +x gradlew
+          ./gradlew test
+
+  test-frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node 22
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: "npm"
+          cache-dependency-path: "frontend/package-lock.json"
+
+      - name: Install Chromium
+        shell: bash
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends chromium
+
+      - name: Install frontend dependencies
+        shell: bash
+        run: |
+          cd frontend
+          npm ci --no-audit --no-fund
+
+      - name: Run frontend tests (headless)
+        shell: bash
+        env:
+          CHROME_BIN: /usr/bin/chromium
+          CI: "true"
+        run: |
+          cd frontend
+          npm run test -- --watch=false --browsers=ChromeHeadlessNoSandbox

.gitignore

@@ -41,3 +41,11 @@ target/
 build/
 .gradle/
 .mvn/
+
+./storage_orders
+./storage_quotes
+storage_orders
+storage_quotes
+
+# Qodana local reports/artifacts
+backend/.qodana/

GEMINI.md

@@ -4,35 +4,42 @@ Questo file serve a dare contesto all'AI (Antigravity/Gemini) sulla struttura e
 
 ## Project Overview
 **Nome**: Print Calculator
-**Scopo**: Calcolare costi e tempi di stampa 3D da file STL.
+**Scopo**: Calcolare costi e tempi di stampa 3D da file STL in modo preciso tramite slicing reale.
 **Stack**:
-- **Backend**: Python (FastAPI), libreria `trimesh` per analisi geometrica.
-- **Frontend**: Angular 19 (TypeScript).
+- **Backend**: Java 21 (Spring Boot 3.4), PostgreSQL, Flyway.
+- **Frontend**: Angular 19 (TypeScript), Angular Material, Three.js per visualizzazione 3D.
 
 ## Architecture
 
 ### Backend (`/backend`)
-- **`main.py`**: Entrypoint dell'applicazione FastAPI.
-    - Definisce l'API `POST /calculate/stl`.
-    - Gestisce l'upload del file, invoca lo slicer e restituisce il preventivo.
-    - Configura CORS per permettere chiamate dal frontend.
-- **`slicer.py`**: Wrappa l'eseguibile di **OrcaSlicer** per effettuare lo slicing reale del modello.
-    - Gestisce i profili di stampa (Macchina, Processo, Filamento).
-    - Crea configurazioni on-the-fly per supportare mesh di grandi dimensioni.
-- **`calculator.py`**: Analizza il G-Code generato.
-    - `GCodeParser`: Estrae tempo di stampa e materiale usato dai metadati del G-Code.
-    - `QuoteCalculator`: Applica i costi (orari, energia, materiale) per generare il prezzo finale.
+- **`BackendApplication.java`**: Entrypoint dell'applicazione Spring Boot.
+- **`controller/`**: Espone le API REST per l'upload e il calcolo dei preventivi.
+- **`service/SlicerService.java`**: Wrappa l'eseguibile di **OrcaSlicer** per effettuare lo slicing reale del modello.
+    - Gestisce i profili di stampa (Macchina, Processo, Filamento) caricati da file JSON.
+    - Crea configurazioni on-the-fly e invoca OrcaSlicer in modalità headless.
+- **`service/GCodeParser.java`**: Analizza il G-Code generato per estrarre tempo di stampa e peso del materiale dai metadati del file.
+- **`service/QuoteCalculator.java`**: Calcola il prezzo finale basandosi su politiche di prezzo salvate nel database.
+    - Gestisce costi macchina a scaglioni (tiered pricing).
+    - Calcola costi energetici basati sulla potenza della stampante e costo del kWh.
+    - Applica markup percentuali e fee fissi per job.
 
 ### Frontend (`/frontend`)
-- Applicazione Angular standard.
-- Usa Angular Material.
-- Service per upload STL e visualizzazione preventivo.
+- Applicazione Angular 19 con architettura modulare (core, features, shared).
+- **Three.js**: Utilizzato per il rendering dei file STL caricati dall'utente.
+- **Angular Material**: Per l'interfaccia utente.
+- **ngx-translate**: Per il supporto multilingua.
 
 ## Key Concepts
-- **Real Slicing**: Il backend esegue un vero slicing usando OrcaSlicer in modalità headless. Questo garantisce stime di tempo e materiale estremamente precise, identiche a quelle che si otterrebbero preparando il file per la stampa.
-- **G-Code Parsing**: Invece di stimare geometricamente, l'applicazione legge direttamene i commenti generati dallo slicer nel G-Code (es. `estimated printing time`, `filament used`).
+- **Real Slicing**: Il backend esegue un vero slicing usando OrcaSlicer. Questo garantisce stime di tempo e materiale estremamente precise.
+- **Database-Driven Pricing**: A differenza di versioni precedenti, il calcolo del preventivo è ora guidato da entità DB (`PricingPolicy`, `PrinterMachine`, `FilamentVariant`).
+- **G-Code Metadata**: L'applicazione legge direttamene i commenti generati dallo slicer nel G-Code (es. `; estimated printing time`, `; filament used [g]`).
 
 ## Development Notes
-- Per eseguire il backend serve `uvicorn`.
-- Il frontend richiede `npm install` al primo avvio.
-- Le configurazioni di stampa (layer height, wall thickness, infill) sono attualmente hardcoded o con valori di default nel backend, ma potrebbero essere esposte come parametri API in futuro.
+- **Backend**: Richiede JDK 21. Si avvia con `./gradlew bootRun`.
+- **Database**: Richiede PostgreSQL. Le migrazioni sono gestite da Flyway.
+- **Frontend**: Richiede Node.js 22. Si avvia con `npm start`.
+- **OrcaSlicer**: Deve essere installato sul sistema e il percorso configurato in `application.properties` o tramite variabile d'ambiente `SLICER_PATH`.
+
+## AI Agent Rules
+- **No Inline Code**: Tutti i componenti Angular DEVONO usare file separati per HTML (`templateUrl`) e SCSS (`styleUrl`). È vietato usare `template` o `styles` inline nel decoratore `@Component`.
+- **Spring Boot Conventions**: Seguire i pattern standard di Spring Boot (Service-Repository-Controller).

Makefile

@@ -1,10 +0,0 @@
-.PHONY: install s
-install:
-	@echo "Installing Backend dependencies..."
-	cd backend && pip install -r requirements.txt || pip install fastapi uvicorn trimesh python-multipart numpy
-	@echo "Installing Frontend dependencies..."
-	cd frontend && npm install
-
-start:
-	@echo "Starting development environment..."
-	./start.sh

README.md

@@ -1,70 +1,67 @@
 # Print Calculator (OrcaSlicer Edition)
 
-Un'applicazione Full Stack (Angular + Python/FastAPI) per calcolare preventivi di stampa 3D precisi utilizzando **OrcaSlicer** in modalità headless.
+Un'applicazione Full Stack (Angular + Spring Boot) per calcolare preventivi di stampa 3D precisi utilizzando **OrcaSlicer** in modalità headless.
 
 ## Funzionalità
 
-*   **Slicing Reale**: Usa il motore di OrcaSlicer per stimare tempo e materiale, non semplici approssimazioni geometriche.
-*   **Preventivazione Completa**: Calcola costo materiale, ammortamento macchina, energia e ricarico.
-*   **Configurabile**: Prezzi e parametri macchina modificabili via variabili d'ambiente.
-*   **Docker Ready**: Tutto containerizzato per un facile deployment.
+*   **Slicing Reale**: Usa il motore di OrcaSlicer per stimare tempo e materiale, garantendo la massima precisione.
+*   **Preventivazione Database-Driven**: Calcolo basato su politiche di prezzo configurabili nel database (costo materiale, ammortamento macchina a scaglioni, energia e markup).
+*   **Visualizzazione 3D**: Anteprima del file STL caricato tramite Three.js.
+*   **Multi-Profilo**: Supporto per diverse stampanti, materiali e profili di processo.
+
+## Stack Tecnologico
+
+- **Backend**: Java 21, Spring Boot 3.4, PostgreSQL, Flyway.
+- **Frontend**: Angular 19, Angular Material, Three.js.
+- **Slicer**: OrcaSlicer (invocato via CLI).
 
 ## Prerequisiti
 
-*   Docker Desktop & Docker Compose installati.
+*   **Java 21** installato.
+*   **Node.js 22** e **npm** installati.
+*   **PostgreSQL** attivo.
+*   **OrcaSlicer** installato sul sistema.
 
 ## Avvio Rapido
 
-1.  Clona il repository.
-2.  Esegui lo script di avvio o docker-compose:
-    ```bash
-    docker-compose up --build
-    ```
-    *Nota: La prima build impiegherà alcuni minuti per scaricare OrcaSlicer (~200MB) e compilare il Frontend.*
+### 1. Database
+Crea un database PostgreSQL chiamato `printcalc`. Le tabelle verranno create automaticamente al primo avvio tramite Flyway.
 
-3.  Accedi all'applicazione:
-    *   **Frontend**: [http://localhost](http://localhost)
-    *   **API Docs**: [http://localhost:8000/docs](http://localhost:8000/docs)
+### 2. Backend
+Configura il percorso di OrcaSlicer in `backend/src/main/resources/application.properties` o tramite la variabile d'ambiente `SLICER_PATH`.
 
-## Configurazione Prezzi
-
-Puoi modificare i prezzi nel file `docker-compose.yml` (sezione `environment` del servizio backend):
-
-*   `FILAMENT_COST_PER_KG`: Costo filamento al kg (es. 25.0).
-*   `MACHINE_COST_PER_HOUR`: Costo orario macchina (ammortamento/manutenzione).
-*   `ENERGY_COST_PER_KWH`: Costo energia elettrica.
-*   `MARKUP_PERCENT`: Margine di profitto percentuale (es. 20 = +20%).
-
-## Struttura del Progetto
-
-*   `/backend`: API Python FastAPI. Include Dockerfile che scarica OrcaSlicer AppImage.
-*   `/frontend`: Applicazione Angular 19+ con Material Design.
-*   `/backend/profiles`: Contiene i profili di slicing (.ini). Attualmente configurato per una stima generica simil-Bambu Lab A1.
-
-## Troubleshooting
-
-### Errore Download OrcaSlicer
-Se la build del backend fallisce durante il download di `OrcaSlicer.AppImage`, verifica la tua connessione internet o aggiorna l'URL nel `backend/Dockerfile`.
-
-### Slicing Fallito (Costo 0 o Errore)
-Se l'API ritorna errore o valori nulli:
-1.  Controlla che il file STL sia valido (manifold).
-2.  Controlla i log del backend: `docker logs print-calculator-backend`.
-
-## Sviluppo Locale (Senza Docker)
-
-**Backend**:
-Richiede Linux (o WSL2) per eseguire l'AppImage di OrcaSlicer.
 ```bash
 cd backend
-pip install -r requirements.txt
-# Assicurati di avere OrcaSlicer installato e nel PATH o aggiorna SLICER_PATH in slicer.py
-uvicorn main:app --reload
+./gradlew bootRun
 ```
 
-**Frontend**:
+### 3. Frontend
 ```bash
 cd frontend
 npm install
 npm start
 ```
+
+Accedi a [http://localhost:4200](http://localhost:4200).
+
+## Configurazione Prezzi
+
+I prezzi non sono più gestiti tramite variabili d'ambiente fisse ma tramite tabelle nel database:
+- `pricing_policy`: Definisce markup, fee fissi e costi elettrici.
+- `pricing_policy_machine_hour_tier`: Definisce i costi orari delle macchine in base alla durata della stampa.
+- `printer_machine`: Anagrafica stampanti e consumi energetici.
+- `filament_material_type` / `filament_variant`: Listino prezzi materiali.
+
+## Struttura del Progetto
+
+*   `/backend`: API Spring Boot.
+*   `/frontend`: Applicazione Angular.
+*   `/backend/profiles`: Contiene i file di configurazione per OrcaSlicer.
+
+## Troubleshooting
+
+### Percorso OrcaSlicer
+Assicurati che `slicer.path` punti al binario corretto. Su macOS è solitamente `/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer`. Su Linux è il percorso all'AppImage (estratta o meno).
+
+### Database connection
+Verifica le credenziali in `application.properties`. Se usi Docker, puoi passare `DB_URL`, `DB_USERNAME` e `DB_PASSWORD` come variabili d'ambiente.

backend/Dockerfile

@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
     libglib2.0-0 \
     libgtk-3-0 \
     libdbus-1-3 \
-    libwebkit2gtk-4.1-0 \
+    libwebkit2gtk-4.0-37 \
     && rm -rf /var/lib/apt/lists/*
 
 # Install OrcaSlicer
@@ -41,4 +41,6 @@ COPY profiles ./profiles
 
 EXPOSE 8080
 
-CMD ["java", "-jar", "app.jar"]
+COPY entrypoint.sh .
+RUN chmod +x entrypoint.sh
+ENTRYPOINT ["./entrypoint.sh"]

backend/build.gradle

@@ -1,5 +1,6 @@
 plugins {
 	id 'java'
+	id 'application'
 	id 'org.springframework.boot' version '3.4.1'
 	id 'io.spring.dependency-management' version '1.1.7'
 }
@@ -13,17 +14,47 @@ java {
 	}
 }
 
+application {
+	mainClass = 'com.printcalculator.BackendApplication'
+}
+
 repositories {
 	mavenCentral()
 }
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-security'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'xyz.capybara:clamav-client:2.1.2'
+    implementation 'org.springframework.boot:spring-boot-starter-actuator'
+    runtimeOnly 'org.postgresql:postgresql'
 	developmentOnly 'org.springframework.boot:spring-boot-devtools'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'org.springframework.security:spring-security-test'
+	testRuntimeOnly 'com.h2database:h2'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	implementation 'io.github.openhtmltopdf:openhtmltopdf-pdfbox:1.1.37'
+	implementation 'io.github.openhtmltopdf:openhtmltopdf-svg-support:1.1.37'
+	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+	implementation 'net.codecrete.qrbill:qrbill-generator:3.4.0'
+	implementation 'org.springframework.boot:spring-boot-starter-mail'
+
+
+
 }
 
 tasks.named('test') {
 	useJUnitPlatform()
 }
+
+tasks.named('bootRun') {
+	args = ["--spring.profiles.active=local"]
+}
+
+application {
+	applicationDefaultJvmArgs = ["-Dspring.profiles.active=local"]
+}

backend/entrypoint.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+echo "----------------------------------------------------------------"
+echo "Starting Backend Application"
+echo "DB_URL: $DB_URL"
+echo "DB_USERNAME: $DB_USERNAME"
+echo "SPRING_DATASOURCE_URL: $SPRING_DATASOURCE_URL"
+echo "SLICER_PATH: $SLICER_PATH"
+echo "----------------------------------------------------------------"
+
+# Determine which environment variables to use for database connection
+# This allows compatibility with different docker-compose configurations
+FINAL_DB_URL="${DB_URL:-$SPRING_DATASOURCE_URL}"
+FINAL_DB_USER="${DB_USERNAME:-$SPRING_DATASOURCE_USERNAME}"
+FINAL_DB_PASS="${DB_PASSWORD:-$SPRING_DATASOURCE_PASSWORD}"
+
+if [ -n "$FINAL_DB_URL" ]; then
+  echo "Using database URL: $FINAL_DB_URL"
+  exec java -jar app.jar \
+    --spring.datasource.url="${FINAL_DB_URL}" \
+    --spring.datasource.username="${FINAL_DB_USER}" \
+    --spring.datasource.password="${FINAL_DB_PASS}"
+else
+  echo "No database URL specified in environment, relying on application.properties defaults."
+  exec java -jar app.jar
+fi

backend/profiles/profiles/BBL/machine/fdm_bbl_3dp_001_common.json

@@ -139,4 +139,4 @@
     "layer_change_gcode": "; layer num/total_layer_count: {layer_num+1}/[total_layer_count]\nM622.1 S1 ; for prev firmware, default turned on\nM1002 judge_flag timelapse_record_flag\nM622 J1\n{if timelapse_type == 0} ; timelapse without wipe tower\nM971 S11 C10 O0\n{elsif timelapse_type == 1} ; timelapse with wipe tower\nG92 E0\nG1 E-[retraction_length] F1800\nG17\nG2 Z{layer_z + 0.4} I0.86 J0.86 P1 F20000 ; spiral lift a little\nG1 X65 Y245 F20000 ; move to safe pos\nG17\nG2 Z{layer_z} I0.86 J0.86 P1 F20000\nG1 Y265 F3000\nM400 P300\nM971 S11 C10 O0\nG92 E0\nG1 E[retraction_length] F300\nG1 X100 F5000\nG1 Y255 F20000\n{endif}\nM623\n; update layer progress\nM73 L{layer_num+1}\nM991 S0 P{layer_num} ;notify layer change",
     "change_filament_gcode": "M620 S[next_extruder]A\nM204 S9000\n{if toolchange_count > 1 && (z_hop_types[current_extruder] == 0 || z_hop_types[current_extruder] == 3)}\nG17\nG2 Z{z_after_toolchange + 0.4} I0.86 J0.86 P1 F10000 ; spiral lift a little from second lift\n{endif}\nG1 Z{max_layer_z + 3.0} F1200\n\nG1 X70 F21000\nG1 Y245\nG1 Y265 F3000\nM400\nM106 P1 S0\nM106 P2 S0\n{if old_filament_temp > 142 && next_extruder < 255}\nM104 S[old_filament_temp]\n{endif}\nG1 X90 F3000\nG1 Y255 F4000\nG1 X100 F5000\nG1 X120 F15000\n\nG1 X20 Y50 F21000\nG1 Y-3\n{if toolchange_count == 2}\n; get travel path for change filament\nM620.1 X[travel_point_1_x] Y[travel_point_1_y] F21000 P0\nM620.1 X[travel_point_2_x] Y[travel_point_2_y] F21000 P1\nM620.1 X[travel_point_3_x] Y[travel_point_3_y] F21000 P2\n{endif}\nM620.1 E F[old_filament_e_feedrate] T{nozzle_temperature_range_high[previous_extruder]}\nT[next_extruder]\nM620.1 E F[new_filament_e_feedrate] T{nozzle_temperature_range_high[next_extruder]}\n\n{if next_extruder < 255}\nM400\n\nG92 E0\n{if flush_length_1 > 1}\n; FLUSH_START\n; always use highest temperature to flush\nM400\nM109 S[nozzle_temperature_range_high]\n{if flush_length_1 > 23.7}\nG1 E23.7 F{old_filament_e_feedrate} ; do not need pulsatile flushing for start part\nG1 E{(flush_length_1 - 23.7) * 0.02} F50\nG1 E{(flush_length_1 - 23.7) * 0.23} F{old_filament_e_feedrate}\nG1 E{(flush_length_1 - 23.7) * 0.02} F50\nG1 E{(flush_length_1 - 23.7) * 0.23} F{new_filament_e_feedrate}\nG1 E{(flush_length_1 - 23.7) * 0.02} F50\nG1 E{(flush_length_1 - 23.7) * 0.23} F{new_filament_e_feedrate}\nG1 E{(flush_length_1 - 23.7) * 0.02} F50\nG1 E{(flush_length_1 - 23.7) * 0.23} F{new_filament_e_feedrate}\n{else}\nG1 E{flush_length_1} F{old_filament_e_feedrate}\n{endif}\n; FLUSH_END\nG1 E-[old_retract_length_toolchange] F1800\nG1 E[old_retract_length_toolchange] F300\n{endif}\n\n{if flush_length_2 > 1}\n; FLUSH_START\nG1 E{flush_length_2 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_2 * 0.02} F50\nG1 E{flush_length_2 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_2 * 0.02} F50\nG1 E{flush_length_2 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_2 * 0.02} F50\nG1 E{flush_length_2 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_2 * 0.02} F50\nG1 E{flush_length_2 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_2 * 0.02} F50\n; FLUSH_END\nG1 E-[new_retract_length_toolchange] F1800\nG1 E[new_retract_length_toolchange] F300\n{endif}\n\n{if flush_length_3 > 1}\n; FLUSH_START\nG1 E{flush_length_3 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_3 * 0.02} F50\nG1 E{flush_length_3 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_3 * 0.02} F50\nG1 E{flush_length_3 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_3 * 0.02} F50\nG1 E{flush_length_3 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_3 * 0.02} F50\nG1 E{flush_length_3 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_3 * 0.02} F50\n; FLUSH_END\nG1 E-[new_retract_length_toolchange] F1800\nG1 E[new_retract_length_toolchange] F300\n{endif}\n\n{if flush_length_4 > 1}\n; FLUSH_START\nG1 E{flush_length_4 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_4 * 0.02} F50\nG1 E{flush_length_4 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_4 * 0.02} F50\nG1 E{flush_length_4 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_4 * 0.02} F50\nG1 E{flush_length_4 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_4 * 0.02} F50\nG1 E{flush_length_4 * 0.18} F{new_filament_e_feedrate}\nG1 E{flush_length_4 * 0.02} F50\n; FLUSH_END\n{endif}\n; FLUSH_START\nM400\nM109 S[new_filament_temp]\nG1 E2 F{new_filament_e_feedrate} ;Compensate for filament spillage during waiting temperature\n; FLUSH_END\nM400\nG92 E0\nG1 E-[new_retract_length_toolchange] F1800\nM106 P1 S255\nM400 S3\nG1 X80 F15000\nG1 X60 F15000\nG1 X80 F15000\nG1 X60 F15000; shake to put down garbage\n\nG1 X70 F5000\nG1 X90 F3000\nG1 Y255 F4000\nG1 X100 F5000\nG1 Y265 F5000\nG1 X70 F10000\nG1 X100 F5000\nG1 X70 F10000\nG1 X100 F5000\nG1 X165 F15000; wipe and shake\nG1 Y256 ; move Y to aside, prevent collision\nM400\nG1 Z{max_layer_z + 3.0} F3000\n{if layer_z <= (initial_layer_print_height + 0.001)}\nM204 S[initial_layer_acceleration]\n{else}\nM204 S[default_acceleration]\n{endif}\n{else}\nG1 X[x_after_toolchange] Y[y_after_toolchange] Z[z_after_toolchange] F12000\n{endif}\nM621 S[next_extruder]A",
     "machine_pause_gcode": "M400 U1"
-}
+}

backend/qodana.yaml

@@ -0,0 +1,48 @@
+#-------------------------------------------------------------------------------#
+#               Qodana analysis is configured by qodana.yaml file               #
+#             https://www.jetbrains.com/help/qodana/qodana-yaml.html            #
+#-------------------------------------------------------------------------------#
+
+#################################################################################
+#              WARNING: Do not store sensitive information in this file,        #
+#               as its contents will be included in the Qodana report.          #
+#################################################################################
+version: "1.0"
+
+#Specify inspection profile for code analysis
+profile:
+  name: qodana.starter
+
+#Enable inspections
+#include:
+#  - name: <SomeEnabledInspectionId>
+
+#Disable inspections
+#exclude:
+#  - name: <SomeDisabledInspectionId>
+#    paths:
+#      - <path/where/not/run/inspection>
+
+projectJDK: "21" #(Applied in CI/CD pipeline)
+
+#Execute shell command before Qodana execution (Applied in CI/CD pipeline)
+#bootstrap: sh ./prepare-qodana.sh
+
+#Install IDE plugins before Qodana execution (Applied in CI/CD pipeline)
+#plugins:
+#  - id: <plugin.id> #(plugin id can be found at https://plugins.jetbrains.com)
+
+# Quality gate. Will fail the CI/CD pipeline if any condition is not met
+# severityThresholds - configures maximum thresholds for different problem severities
+# testCoverageThresholds - configures minimum code coverage on a whole project and newly added code
+# Code Coverage is available in Ultimate and Ultimate Plus plans
+#failureConditions:
+#  severityThresholds:
+#    any: 15
+#    critical: 5
+#  testCoverageThresholds:
+#    fresh: 70
+#    total: 50
+
+#Specify Qodana linter for analysis (Applied in CI/CD pipeline)
+linter: jetbrains/qodana-jvm:2025.3

backend/src/main/java/com/printcalculator/BackendApplication.java

@@ -2,8 +2,15 @@ package com.printcalculator;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.security.servlet.UserDetailsServiceAutoConfiguration;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
 
-@SpringBootApplication
+@SpringBootApplication(exclude = {UserDetailsServiceAutoConfiguration.class})
+@EnableTransactionManagement
+@EnableScheduling
+@EnableAsync
 public class BackendApplication {
 
 	public static void main(String[] args) {

backend/src/main/java/com/printcalculator/config/AppProperties.java

@@ -1,43 +0,0 @@
-package com.printcalculator.config;
-
-import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.context.annotation.Configuration;
-
-@Configuration
-@ConfigurationProperties(prefix = "pricing")
-public class AppProperties {
-
-    private double filamentCostPerKg;
-    private double machineCostPerHour;
-    private double energyCostPerKwh;
-    private double printerPowerWatts;
-    private double markupPercent;
-
-    private String slicerPath;
-    private String profilesRoot;
-
-    // Getters and Setters needed for Spring binding
-    
-    public double getFilamentCostPerKg() { return filamentCostPerKg; }
-    public void setFilamentCostPerKg(double filamentCostPerKg) { this.filamentCostPerKg = filamentCostPerKg; }
-
-    public double getMachineCostPerHour() { return machineCostPerHour; }
-    public void setMachineCostPerHour(double machineCostPerHour) { this.machineCostPerHour = machineCostPerHour; }
-
-    public double getEnergyCostPerKwh() { return energyCostPerKwh; }
-    public void setEnergyCostPerKwh(double energyCostPerKwh) { this.energyCostPerKwh = energyCostPerKwh; }
-
-    public double getPrinterPowerWatts() { return printerPowerWatts; }
-    public void setPrinterPowerWatts(double printerPowerWatts) { this.printerPowerWatts = printerPowerWatts; }
-
-    public double getMarkupPercent() { return markupPercent; }
-    public void setMarkupPercent(double markupPercent) { this.markupPercent = markupPercent; }
-
-    // Slicer props are not under "pricing" prefix in properties file?
-    // Wait, in application.properties I put them at root level/custom. 
-    // Let's fix this class to map correctly or change prefix.
-    // I'll make a separate section or just bind manually. 
-    // Actually, I'll just add @Value in services for simplicity or fix the prefix structure.
-    // Let's stick to standard @Value for simple paths if this is messy. 
-    // Or better, creating a dedicated SlicerProperties.
-}

backend/src/main/java/com/printcalculator/config/CorsConfig.java

@@ -0,0 +1,27 @@
+package com.printcalculator.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class CorsConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOrigins(
+                        "http://localhost",
+                        "http://localhost:4200",
+                        "http://localhost:80",
+                        "http://127.0.0.1",
+                        "https://dev.3d-fab.ch",
+                        "https://int.3d-fab.ch",
+                        "https://3d-fab.ch"
+                )
+                .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS", "PATCH")
+                .allowedHeaders("*")
+                .allowCredentials(true);
+    }
+}

backend/src/main/java/com/printcalculator/config/SecurityConfig.java

@@ -0,0 +1,47 @@
+package com.printcalculator.config;
+
+import com.printcalculator.security.AdminSessionAuthenticationFilter;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.security.config.Customizer;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
+import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
+
+@Configuration
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain securityFilterChain(
+            HttpSecurity http,
+            AdminSessionAuthenticationFilter adminSessionAuthenticationFilter
+    ) throws Exception {
+        http
+                .csrf(AbstractHttpConfigurer::disable)
+                .cors(Customizer.withDefaults())
+                .sessionManagement(sm -> sm.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
+                .httpBasic(AbstractHttpConfigurer::disable)
+                .formLogin(AbstractHttpConfigurer::disable)
+                .logout(AbstractHttpConfigurer::disable)
+                .authorizeHttpRequests(auth -> auth
+                        .requestMatchers(HttpMethod.OPTIONS, "/**").permitAll()
+                        .requestMatchers("/actuator/health", "/actuator/health/**").permitAll()
+                        .requestMatchers("/actuator/**").denyAll()
+                        .requestMatchers("/api/admin/auth/login").permitAll()
+                        .requestMatchers("/api/admin/**").authenticated()
+                        .anyRequest().permitAll()
+                )
+                .exceptionHandling(ex -> ex.authenticationEntryPoint((request, response, authException) -> {
+                    response.setStatus(401);
+                    response.setContentType(MediaType.APPLICATION_JSON_VALUE);
+                    response.getWriter().write("{\"error\":\"UNAUTHORIZED\"}");
+                }))
+                .addFilterBefore(adminSessionAuthenticationFilter, UsernamePasswordAuthenticationFilter.class);
+
+        return http.build();
+    }
+}

backend/src/main/java/com/printcalculator/config/SlicerConfig.java

@@ -1,13 +0,0 @@
-package com.printcalculator.config;
-
-import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.context.annotation.Configuration;
-
-@Configuration
-@ConfigurationProperties(prefix = "") 
-// Hack: standard prefix is usually required. I'll use @Value in service or correct this.
-// Better: make SlicerConfig class.
-public class SlicerConfig {
-    // Intentionally empty, will use @Value in service for simplicity 
-    // or fix in next step.
-}

backend/src/main/java/com/printcalculator/controller/CustomQuoteRequestController.java

@@ -0,0 +1,267 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.dto.QuoteRequestDto;
+import com.printcalculator.entity.CustomQuoteRequest;
+import com.printcalculator.entity.CustomQuoteRequestAttachment;
+import com.printcalculator.repository.CustomQuoteRequestAttachmentRepository;
+import com.printcalculator.repository.CustomQuoteRequestRepository;
+import com.printcalculator.service.ClamAVService;
+import com.printcalculator.service.email.EmailNotificationService;
+import jakarta.validation.Valid;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.time.OffsetDateTime;
+import java.time.Year;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.regex.Pattern;
+
+@RestController
+@RequestMapping("/api/custom-quote-requests")
+public class CustomQuoteRequestController {
+
+    private static final Logger logger = LoggerFactory.getLogger(CustomQuoteRequestController.class);
+    private final CustomQuoteRequestRepository requestRepo;
+    private final CustomQuoteRequestAttachmentRepository attachmentRepo;
+    private final ClamAVService clamAVService;
+    private final EmailNotificationService emailNotificationService;
+
+    @Value("${app.mail.contact-request.admin.enabled:true}")
+    private boolean contactRequestAdminMailEnabled;
+
+    @Value("${app.mail.contact-request.admin.address:infog@3d-fab.ch}")
+    private String contactRequestAdminMailAddress;
+
+    // TODO: Inject Storage Service
+    private static final Path STORAGE_ROOT = Paths.get("storage_requests").toAbsolutePath().normalize();
+    private static final Pattern SAFE_EXTENSION_PATTERN = Pattern.compile("^[a-z0-9]{1,10}$");
+    private static final Set<String> FORBIDDEN_COMPRESSED_EXTENSIONS = Set.of(
+            "zip", "rar", "7z", "tar", "gz", "tgz", "bz2", "tbz2", "xz", "txz", "zst"
+    );
+    private static final Set<String> FORBIDDEN_COMPRESSED_MIME_TYPES = Set.of(
+            "application/zip",
+            "application/x-zip-compressed",
+            "application/x-rar-compressed",
+            "application/vnd.rar",
+            "application/x-7z-compressed",
+            "application/gzip",
+            "application/x-gzip",
+            "application/x-tar",
+            "application/x-bzip2",
+            "application/x-xz",
+            "application/zstd",
+            "application/x-zstd"
+    );
+
+    public CustomQuoteRequestController(CustomQuoteRequestRepository requestRepo,
+                                        CustomQuoteRequestAttachmentRepository attachmentRepo,
+                                        ClamAVService clamAVService,
+                                        EmailNotificationService emailNotificationService) {
+        this.requestRepo = requestRepo;
+        this.attachmentRepo = attachmentRepo;
+        this.clamAVService = clamAVService;
+        this.emailNotificationService = emailNotificationService;
+    }
+
+    // 1. Create Custom Quote Request
+    @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<CustomQuoteRequest> createCustomQuoteRequest(
+            @Valid @RequestPart("request") QuoteRequestDto requestDto,
+            @RequestPart(value = "files", required = false) List<MultipartFile> files
+    ) throws IOException {
+        if (!requestDto.isAcceptTerms() || !requestDto.isAcceptPrivacy()) {
+            throw new ResponseStatusException(
+                    HttpStatus.BAD_REQUEST,
+                    "Accettazione Termini e Privacy obbligatoria."
+            );
+        }
+        
+        // 1. Create Request
+        CustomQuoteRequest request = new CustomQuoteRequest();
+        request.setRequestType(requestDto.getRequestType());
+        request.setCustomerType(requestDto.getCustomerType());
+        request.setEmail(requestDto.getEmail());
+        request.setPhone(requestDto.getPhone());
+        request.setName(requestDto.getName());
+        request.setCompanyName(requestDto.getCompanyName());
+        request.setContactPerson(requestDto.getContactPerson());
+        request.setMessage(requestDto.getMessage());
+        request.setStatus("PENDING");
+        request.setCreatedAt(OffsetDateTime.now());
+        request.setUpdatedAt(OffsetDateTime.now());
+        
+        request = requestRepo.save(request);
+        
+        // 2. Handle Attachments
+        int attachmentsCount = 0;
+        if (files != null && !files.isEmpty()) {
+            if (files.size() > 15) {
+                throw new IOException("Too many files. Max 15 allowed.");
+            }
+            
+            for (MultipartFile file : files) {
+                if (file.isEmpty()) continue;
+
+                if (isCompressedFile(file)) {
+                    throw new ResponseStatusException(
+                            HttpStatus.BAD_REQUEST,
+                            "Compressed files are not allowed."
+                    );
+                }
+                
+                // Scan for virus
+                clamAVService.scan(file.getInputStream());
+                
+                CustomQuoteRequestAttachment attachment = new CustomQuoteRequestAttachment();
+                attachment.setRequest(request);
+                attachment.setOriginalFilename(file.getOriginalFilename());
+                attachment.setMimeType(file.getContentType());
+                attachment.setFileSizeBytes(file.getSize());
+                attachment.setCreatedAt(OffsetDateTime.now());
+                
+                // Generate path
+                UUID fileUuid = UUID.randomUUID();
+                String storedFilename = fileUuid + ".upload";
+                
+                // Note: We don't have attachment ID yet.
+                // We'll save attachment first to get ID.
+                attachment.setStoredFilename(storedFilename);
+                attachment.setStoredRelativePath("PENDING");
+                
+                attachment = attachmentRepo.save(attachment);
+                
+                Path relativePath = Path.of(
+                        "quote-requests",
+                        request.getId().toString(),
+                        "attachments",
+                        attachment.getId().toString(),
+                        storedFilename
+                );
+                attachment.setStoredRelativePath(relativePath.toString());
+                attachmentRepo.save(attachment);
+                
+                // Save file to disk
+                Path absolutePath = resolveWithinStorageRoot(relativePath);
+                Files.createDirectories(absolutePath.getParent());
+                try (InputStream inputStream = file.getInputStream()) {
+                    Files.copy(inputStream, absolutePath, StandardCopyOption.REPLACE_EXISTING);
+                }
+                attachmentsCount++;
+            }
+        }
+
+        sendAdminContactRequestNotification(request, attachmentsCount);
+
+        return ResponseEntity.ok(request);
+    }
+    
+    // 2. Get Request
+    @GetMapping("/{id}")
+    public ResponseEntity<CustomQuoteRequest> getCustomQuoteRequest(@PathVariable UUID id) {
+        return requestRepo.findById(id)
+                .map(ResponseEntity::ok)
+                .orElse(ResponseEntity.notFound().build());
+    }
+    
+    // Helper
+    private String getExtension(String filename) {
+        if (filename == null) return "dat";
+        String cleaned = StringUtils.cleanPath(filename);
+        if (cleaned.contains("..")) {
+            return "dat";
+        }
+        int i = cleaned.lastIndexOf('.');
+        if (i > 0 && i < cleaned.length() - 1) {
+            String ext = cleaned.substring(i + 1).toLowerCase(Locale.ROOT);
+            if (SAFE_EXTENSION_PATTERN.matcher(ext).matches()) {
+                return ext;
+            }
+        }
+        return "dat";
+    }
+
+    private boolean isCompressedFile(MultipartFile file) {
+        String ext = getExtension(file.getOriginalFilename());
+        if (FORBIDDEN_COMPRESSED_EXTENSIONS.contains(ext)) {
+            return true;
+        }
+        String mime = file.getContentType();
+        return mime != null && FORBIDDEN_COMPRESSED_MIME_TYPES.contains(mime.toLowerCase());
+    }
+
+    private Path resolveWithinStorageRoot(Path relativePath) {
+        try {
+            Path normalizedRelative = relativePath.normalize();
+            if (normalizedRelative.isAbsolute()) {
+                throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid attachment path");
+            }
+            Path absolutePath = STORAGE_ROOT.resolve(normalizedRelative).normalize();
+            if (!absolutePath.startsWith(STORAGE_ROOT)) {
+                throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid attachment path");
+            }
+            return absolutePath;
+        } catch (InvalidPathException e) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid attachment path");
+        }
+    }
+
+    private void sendAdminContactRequestNotification(CustomQuoteRequest request, int attachmentsCount) {
+        if (!contactRequestAdminMailEnabled) {
+            return;
+        }
+        if (contactRequestAdminMailAddress == null || contactRequestAdminMailAddress.isBlank()) {
+            logger.warn("Contact request admin notification enabled but no admin address configured.");
+            return;
+        }
+
+        Map<String, Object> templateData = new HashMap<>();
+        templateData.put("requestId", request.getId());
+        templateData.put("createdAt", request.getCreatedAt());
+        templateData.put("requestType", safeValue(request.getRequestType()));
+        templateData.put("customerType", safeValue(request.getCustomerType()));
+        templateData.put("name", safeValue(request.getName()));
+        templateData.put("companyName", safeValue(request.getCompanyName()));
+        templateData.put("contactPerson", safeValue(request.getContactPerson()));
+        templateData.put("email", safeValue(request.getEmail()));
+        templateData.put("phone", safeValue(request.getPhone()));
+        templateData.put("message", safeValue(request.getMessage()));
+        templateData.put("attachmentsCount", attachmentsCount);
+        templateData.put("currentYear", Year.now().getValue());
+
+        emailNotificationService.sendEmail(
+                contactRequestAdminMailAddress,
+                "Nuova richiesta di contatto #" + request.getId(),
+                "contact-request-admin",
+                templateData
+        );
+    }
+
+    private String safeValue(String value) {
+        if (value == null || value.isBlank()) {
+            return "-";
+        }
+        return value;
+    }
+}

backend/src/main/java/com/printcalculator/controller/OptionsController.java

@@ -0,0 +1,223 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.dto.OptionsResponse;
+import com.printcalculator.entity.FilamentMaterialType;
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.entity.LayerHeightOption;
+import com.printcalculator.entity.MaterialOrcaProfileMap;
+import com.printcalculator.entity.NozzleOption;
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.entity.PrinterMachineProfile;
+import com.printcalculator.repository.FilamentMaterialTypeRepository;
+import com.printcalculator.repository.FilamentVariantRepository;
+import com.printcalculator.repository.LayerHeightOptionRepository;
+import com.printcalculator.repository.MaterialOrcaProfileMapRepository;
+import com.printcalculator.repository.NozzleOptionRepository;
+import com.printcalculator.repository.PrinterMachineRepository;
+import com.printcalculator.service.OrcaProfileResolver;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.math.BigDecimal;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@RestController
+public class OptionsController {
+
+    private final FilamentMaterialTypeRepository materialRepo;
+    private final FilamentVariantRepository variantRepo;
+    private final LayerHeightOptionRepository layerHeightRepo;
+    private final NozzleOptionRepository nozzleRepo;
+    private final PrinterMachineRepository printerMachineRepo;
+    private final MaterialOrcaProfileMapRepository materialOrcaMapRepo;
+    private final OrcaProfileResolver orcaProfileResolver;
+
+    public OptionsController(FilamentMaterialTypeRepository materialRepo,
+                             FilamentVariantRepository variantRepo,
+                             LayerHeightOptionRepository layerHeightRepo,
+                             NozzleOptionRepository nozzleRepo,
+                             PrinterMachineRepository printerMachineRepo,
+                             MaterialOrcaProfileMapRepository materialOrcaMapRepo,
+                             OrcaProfileResolver orcaProfileResolver) {
+        this.materialRepo = materialRepo;
+        this.variantRepo = variantRepo;
+        this.layerHeightRepo = layerHeightRepo;
+        this.nozzleRepo = nozzleRepo;
+        this.printerMachineRepo = printerMachineRepo;
+        this.materialOrcaMapRepo = materialOrcaMapRepo;
+        this.orcaProfileResolver = orcaProfileResolver;
+    }
+
+    @GetMapping("/api/calculator/options")
+    @Transactional(readOnly = true)
+    public ResponseEntity<OptionsResponse> getOptions(
+            @RequestParam(value = "printerMachineId", required = false) Long printerMachineId,
+            @RequestParam(value = "nozzleDiameter", required = false) Double nozzleDiameter
+    ) {
+        List<FilamentMaterialType> types = materialRepo.findAll();
+        List<FilamentVariant> allVariants = variantRepo.findByIsActiveTrue().stream()
+                .sorted(Comparator
+                        .comparing((FilamentVariant v) -> safeMaterialCode(v.getFilamentMaterialType()), String.CASE_INSENSITIVE_ORDER)
+                        .thenComparing(v -> safeString(v.getVariantDisplayName()), String.CASE_INSENSITIVE_ORDER))
+                .toList();
+
+        Set<Long> compatibleMaterialTypeIds = resolveCompatibleMaterialTypeIds(printerMachineId, nozzleDiameter);
+
+        List<OptionsResponse.MaterialOption> materialOptions = types.stream()
+                .sorted(Comparator.comparing(t -> safeString(t.getMaterialCode()), String.CASE_INSENSITIVE_ORDER))
+                .map(type -> {
+                    if (!compatibleMaterialTypeIds.isEmpty() && !compatibleMaterialTypeIds.contains(type.getId())) {
+                        return null;
+                    }
+
+                    List<OptionsResponse.VariantOption> variants = allVariants.stream()
+                            .filter(v -> v.getFilamentMaterialType() != null
+                                    && v.getFilamentMaterialType().getId().equals(type.getId()))
+                            .map(v -> new OptionsResponse.VariantOption(
+                                    v.getId(),
+                                    v.getVariantDisplayName(),
+                                    v.getColorName(),
+                                    resolveHexColor(v),
+                                    v.getFinishType() != null ? v.getFinishType() : "GLOSSY",
+                                    v.getStockSpools() != null ? v.getStockSpools().doubleValue() : 0d,
+                                    toStockFilamentGrams(v),
+                                    v.getStockSpools() == null || v.getStockSpools().doubleValue() <= 0
+                            ))
+                            .collect(Collectors.toList());
+
+                    if (variants.isEmpty()) {
+                        return null;
+                    }
+
+                    return new OptionsResponse.MaterialOption(
+                            type.getMaterialCode(),
+                            type.getMaterialCode() + (Boolean.TRUE.equals(type.getIsFlexible()) ? " (Flexible)" : " (Standard)"),
+                            variants
+                    );
+                })
+                .filter(m -> m != null)
+                .toList();
+
+        List<OptionsResponse.QualityOption> qualities = List.of(
+                new OptionsResponse.QualityOption("draft", "Draft"),
+                new OptionsResponse.QualityOption("standard", "Standard"),
+                new OptionsResponse.QualityOption("extra_fine", "High Definition")
+        );
+
+        List<OptionsResponse.InfillPatternOption> patterns = List.of(
+                new OptionsResponse.InfillPatternOption("grid", "Grid"),
+                new OptionsResponse.InfillPatternOption("gyroid", "Gyroid"),
+                new OptionsResponse.InfillPatternOption("cubic", "Cubic")
+        );
+
+        List<OptionsResponse.LayerHeightOptionDTO> layers = layerHeightRepo.findAll().stream()
+                .filter(l -> Boolean.TRUE.equals(l.getIsActive()))
+                .sorted(Comparator.comparing(LayerHeightOption::getLayerHeightMm))
+                .map(l -> new OptionsResponse.LayerHeightOptionDTO(
+                        l.getLayerHeightMm().doubleValue(),
+                        String.format("%.2f mm", l.getLayerHeightMm())
+                ))
+                .toList();
+
+        List<OptionsResponse.NozzleOptionDTO> nozzles = nozzleRepo.findAll().stream()
+                .filter(n -> Boolean.TRUE.equals(n.getIsActive()))
+                .sorted(Comparator.comparing(NozzleOption::getNozzleDiameterMm))
+                .map(n -> new OptionsResponse.NozzleOptionDTO(
+                        n.getNozzleDiameterMm().doubleValue(),
+                        String.format("%.1f mm%s", n.getNozzleDiameterMm(),
+                                n.getExtraNozzleChangeFeeChf().doubleValue() > 0
+                                        ? String.format(" (+ %.2f CHF)", n.getExtraNozzleChangeFeeChf())
+                                        : " (Standard)")
+                ))
+                .toList();
+
+        return ResponseEntity.ok(new OptionsResponse(materialOptions, qualities, patterns, layers, nozzles));
+    }
+
+    private Set<Long> resolveCompatibleMaterialTypeIds(Long printerMachineId, Double nozzleDiameter) {
+        PrinterMachine machine = null;
+        if (printerMachineId != null) {
+            machine = printerMachineRepo.findById(printerMachineId).orElse(null);
+        }
+        if (machine == null) {
+            machine = printerMachineRepo.findFirstByIsActiveTrue().orElse(null);
+        }
+        if (machine == null) {
+            return Set.of();
+        }
+
+        BigDecimal nozzle = nozzleDiameter != null
+                ? BigDecimal.valueOf(nozzleDiameter)
+                : BigDecimal.valueOf(0.40);
+
+        PrinterMachineProfile machineProfile = orcaProfileResolver
+                .resolveMachineProfile(machine, nozzle)
+                .orElse(null);
+
+        if (machineProfile == null) {
+            return Set.of();
+        }
+
+        List<MaterialOrcaProfileMap> maps = materialOrcaMapRepo.findByPrinterMachineProfileAndIsActiveTrue(machineProfile);
+        return maps.stream()
+                .map(MaterialOrcaProfileMap::getFilamentMaterialType)
+                .filter(m -> m != null && m.getId() != null)
+                .map(FilamentMaterialType::getId)
+                .collect(Collectors.toSet());
+    }
+
+    private String resolveHexColor(FilamentVariant variant) {
+        if (variant.getColorHex() != null && !variant.getColorHex().isBlank()) {
+            return variant.getColorHex();
+        }
+        return getColorHex(variant.getColorName());
+    }
+
+    private double toStockFilamentGrams(FilamentVariant variant) {
+        if (variant.getStockSpools() == null || variant.getSpoolNetKg() == null) {
+            return 0d;
+        }
+        return variant.getStockSpools()
+                .multiply(variant.getSpoolNetKg())
+                .multiply(BigDecimal.valueOf(1000))
+                .doubleValue();
+    }
+
+    private String safeMaterialCode(FilamentMaterialType type) {
+        if (type == null || type.getMaterialCode() == null) {
+            return "";
+        }
+        return type.getMaterialCode();
+    }
+
+    private String safeString(String value) {
+        return value == null ? "" : value;
+    }
+
+    // Temporary helper for legacy values where color hex is not yet set in DB
+    private String getColorHex(String colorName) {
+        if (colorName == null) {
+            return "#9e9e9e";
+        }
+        String lower = colorName.toLowerCase();
+        if (lower.contains("black") || lower.contains("nero")) return "#1a1a1a";
+        if (lower.contains("white") || lower.contains("bianco")) return "#f5f5f5";
+        if (lower.contains("blue") || lower.contains("blu")) return "#1976d2";
+        if (lower.contains("red") || lower.contains("rosso")) return "#d32f2f";
+        if (lower.contains("green") || lower.contains("verde")) return "#388e3c";
+        if (lower.contains("orange") || lower.contains("arancione")) return "#ffa726";
+        if (lower.contains("grey") || lower.contains("gray") || lower.contains("grigio")) {
+            if (lower.contains("dark") || lower.contains("scuro")) return "#424242";
+            return "#bdbdbd";
+        }
+        if (lower.contains("purple") || lower.contains("viola")) return "#7b1fa2";
+        if (lower.contains("yellow") || lower.contains("giallo")) return "#fbc02d";
+        return "#9e9e9e";
+    }
+}

backend/src/main/java/com/printcalculator/controller/OrderController.java

@@ -0,0 +1,360 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.dto.*;
+import com.printcalculator.entity.*;
+import com.printcalculator.repository.*;
+import com.printcalculator.service.InvoicePdfRenderingService;
+import com.printcalculator.service.OrderService;
+import com.printcalculator.service.PaymentService;
+import com.printcalculator.service.QrBillService;
+import com.printcalculator.service.StorageService;
+import com.printcalculator.service.TwintPaymentService;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.util.StringUtils;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+import jakarta.validation.Valid;
+
+import java.io.IOException;
+
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+
+import java.util.List;
+import java.util.UUID;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.Base64;
+import java.util.stream.Collectors;
+import java.net.URI;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+@RestController
+@RequestMapping("/api/orders")
+public class OrderController {
+    private static final Pattern SAFE_EXTENSION_PATTERN = Pattern.compile("^[a-z0-9]{1,10}$");
+
+    private final OrderService orderService;
+    private final OrderRepository orderRepo;
+    private final OrderItemRepository orderItemRepo;
+    private final QuoteSessionRepository quoteSessionRepo;
+    private final QuoteLineItemRepository quoteLineItemRepo;
+    private final CustomerRepository customerRepo;
+    private final StorageService storageService;
+    private final InvoicePdfRenderingService invoiceService;
+    private final QrBillService qrBillService;
+    private final TwintPaymentService twintPaymentService;
+    private final PaymentService paymentService;
+    private final PaymentRepository paymentRepo;
+
+
+    public OrderController(OrderService orderService,
+                           OrderRepository orderRepo,
+                           OrderItemRepository orderItemRepo,
+                           QuoteSessionRepository quoteSessionRepo,
+                           QuoteLineItemRepository quoteLineItemRepo,
+                           CustomerRepository customerRepo,
+                           StorageService storageService,
+                           InvoicePdfRenderingService invoiceService,
+                           QrBillService qrBillService,
+                           TwintPaymentService twintPaymentService,
+                           PaymentService paymentService,
+                           PaymentRepository paymentRepo) {
+        this.orderService = orderService;
+        this.orderRepo = orderRepo;
+        this.orderItemRepo = orderItemRepo;
+        this.quoteSessionRepo = quoteSessionRepo;
+        this.quoteLineItemRepo = quoteLineItemRepo;
+        this.customerRepo = customerRepo;
+        this.storageService = storageService;
+        this.invoiceService = invoiceService;
+        this.qrBillService = qrBillService;
+        this.twintPaymentService = twintPaymentService;
+        this.paymentService = paymentService;
+        this.paymentRepo = paymentRepo;
+    }
+
+
+    // 1. Create Order from Quote
+    @PostMapping("/from-quote/{quoteSessionId}")
+    @Transactional
+    public ResponseEntity<OrderDto> createOrderFromQuote(
+            @PathVariable UUID quoteSessionId,
+            @Valid @RequestBody com.printcalculator.dto.CreateOrderRequest request
+    ) {
+        Order order = orderService.createOrderFromQuote(quoteSessionId, request);
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(order.getId());
+        return ResponseEntity.ok(convertToDto(order, items));
+    }
+    
+    @PostMapping(value = "/{orderId}/items/{orderItemId}/file", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<Void> uploadOrderItemFile(
+        @PathVariable UUID orderId,
+        @PathVariable UUID orderItemId,
+        @RequestParam("file") MultipartFile file
+    ) throws IOException {
+        
+        OrderItem item = orderItemRepo.findById(orderItemId)
+                .orElseThrow(() -> new RuntimeException("OrderItem not found"));
+                
+        if (!item.getOrder().getId().equals(orderId)) {
+            return ResponseEntity.badRequest().build();
+        }
+        
+        String relativePath = item.getStoredRelativePath();
+        Path destinationRelativePath;
+        if (relativePath == null || relativePath.equals("PENDING")) {
+             String ext = getExtension(file.getOriginalFilename());
+             String storedFilename = UUID.randomUUID() + "." + ext;
+             destinationRelativePath = Path.of("orders", orderId.toString(), "3d-files", orderItemId.toString(), storedFilename);
+             item.setStoredRelativePath(destinationRelativePath.toString());
+             item.setStoredFilename(storedFilename);
+        } else {
+            destinationRelativePath = resolveOrderItemRelativePath(relativePath, orderId, orderItemId);
+            if (destinationRelativePath == null) {
+                return ResponseEntity.badRequest().build();
+            }
+        }
+
+        storageService.store(file, destinationRelativePath);
+        item.setFileSizeBytes(file.getSize());
+        item.setMimeType(file.getContentType());
+        orderItemRepo.save(item);
+        
+        return ResponseEntity.ok().build();
+    }
+
+    @GetMapping("/{orderId}")
+    public ResponseEntity<OrderDto> getOrder(@PathVariable UUID orderId) {
+        return orderRepo.findById(orderId)
+                .map(o -> {
+                    List<OrderItem> items = orderItemRepo.findByOrder_Id(o.getId());
+                    return ResponseEntity.ok(convertToDto(o, items));
+                })
+                .orElse(ResponseEntity.notFound().build());
+    }
+
+    @PostMapping("/{orderId}/payments/report")
+    @Transactional
+    public ResponseEntity<OrderDto> reportPayment(
+            @PathVariable UUID orderId,
+            @RequestBody Map<String, String> payload
+    ) {
+        String method = payload.get("method");
+        paymentService.reportPayment(orderId, method);
+        return getOrder(orderId);
+    }
+
+    @GetMapping("/{orderId}/confirmation")
+    public ResponseEntity<byte[]> getConfirmation(@PathVariable UUID orderId) {
+        return generateDocument(orderId, true);
+    }
+
+    @GetMapping("/{orderId}/invoice")
+    public ResponseEntity<byte[]> getInvoice(@PathVariable UUID orderId) {
+        // Paid invoices are sent by email after back-office payment confirmation.
+        // The public endpoint must not expose a "paid" invoice download.
+        return ResponseEntity.notFound().build();
+    }
+
+    private ResponseEntity<byte[]> generateDocument(UUID orderId, boolean isConfirmation) {
+        Order order = orderRepo.findById(orderId)
+                .orElseThrow(() -> new RuntimeException("Order not found"));
+
+        if (isConfirmation) {
+            Path relativePath = buildConfirmationPdfRelativePath(order);
+            try {
+                byte[] existingPdf = storageService.loadAsResource(relativePath).getInputStream().readAllBytes();
+                return ResponseEntity.ok()
+                        .header("Content-Disposition", "attachment; filename=\"confirmation-" + getDisplayOrderNumber(order) + ".pdf\"")
+                        .contentType(MediaType.APPLICATION_PDF)
+                        .body(existingPdf);
+            } catch (Exception ignored) {
+                // Fallback to on-the-fly generation if the stored file is missing or unreadable.
+            }
+        }
+
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(orderId);
+        Payment payment = paymentRepo.findByOrder_Id(orderId).orElse(null);
+
+        byte[] pdf = invoiceService.generateDocumentPdf(order, items, isConfirmation, qrBillService, payment);
+        String typePrefix = isConfirmation ? "confirmation-" : "invoice-";
+        String truncatedUuid = order.getId().toString().substring(0, 8);
+        return ResponseEntity.ok()
+                .header("Content-Disposition", "attachment; filename=\"" + typePrefix + truncatedUuid + ".pdf\"")
+                .contentType(MediaType.APPLICATION_PDF)
+                .body(pdf);
+    }
+
+    private Path buildConfirmationPdfRelativePath(Order order) {
+        return Path.of(
+                "orders",
+                order.getId().toString(),
+                "documents",
+                "confirmation-" + getDisplayOrderNumber(order) + ".pdf"
+        );
+    }
+
+    @GetMapping("/{orderId}/twint")
+    public ResponseEntity<Map<String, String>> getTwintPayment(@PathVariable UUID orderId) {
+        Order order = orderRepo.findById(orderId).orElse(null);
+        if (order == null) {
+            return ResponseEntity.notFound().build();
+        }
+
+        byte[] qrPng = twintPaymentService.generateQrPng(order, 360);
+        String qrDataUri = "data:image/png;base64," + Base64.getEncoder().encodeToString(qrPng);
+
+        Map<String, String> data = new HashMap<>();
+        data.put("paymentUrl", twintPaymentService.getTwintPaymentUrl(order));
+        data.put("openUrl", "/api/orders/" + orderId + "/twint/open");
+        data.put("qrImageUrl", "/api/orders/" + orderId + "/twint/qr");
+        data.put("qrImageDataUri", qrDataUri);
+        return ResponseEntity.ok(data);
+    }
+
+    @GetMapping("/{orderId}/twint/open")
+    public ResponseEntity<Void> openTwintPayment(@PathVariable UUID orderId) {
+        Order order = orderRepo.findById(orderId).orElse(null);
+        if (order == null) {
+            return ResponseEntity.notFound().build();
+        }
+
+        return ResponseEntity.status(302)
+                .location(URI.create(twintPaymentService.getTwintPaymentUrl(order)))
+                .build();
+    }
+
+    @GetMapping("/{orderId}/twint/qr")
+    public ResponseEntity<byte[]> getTwintQr(
+            @PathVariable UUID orderId,
+            @RequestParam(defaultValue = "320") int size
+    ) {
+        Order order = orderRepo.findById(orderId).orElse(null);
+        if (order == null) {
+            return ResponseEntity.notFound().build();
+        }
+
+        int normalizedSize = Math.max(200, Math.min(size, 600));
+        byte[] png = twintPaymentService.generateQrPng(order, normalizedSize);
+
+        return ResponseEntity.ok()
+                .contentType(MediaType.IMAGE_PNG)
+                .body(png);
+    }
+    
+    private String getExtension(String filename) {
+        if (filename == null) return "stl";
+        String cleaned = StringUtils.cleanPath(filename);
+        if (cleaned.contains("..")) {
+            return "stl";
+        }
+        int i = cleaned.lastIndexOf('.');
+        if (i > 0 && i < cleaned.length() - 1) {
+            String ext = cleaned.substring(i + 1).toLowerCase(Locale.ROOT);
+            if (SAFE_EXTENSION_PATTERN.matcher(ext).matches()) {
+                return ext;
+            }
+        }
+        return "stl";
+    }
+
+    private Path resolveOrderItemRelativePath(String storedRelativePath, UUID orderId, UUID orderItemId) {
+        try {
+            Path candidate = Path.of(storedRelativePath).normalize();
+            if (candidate.isAbsolute()) {
+                return null;
+            }
+
+            Path expectedPrefix = Path.of("orders", orderId.toString(), "3d-files", orderItemId.toString());
+            if (!candidate.startsWith(expectedPrefix)) {
+                return null;
+            }
+
+            return candidate;
+        } catch (InvalidPathException e) {
+            return null;
+        }
+    }
+
+    private OrderDto convertToDto(Order order, List<OrderItem> items) {
+        OrderDto dto = new OrderDto();
+        dto.setId(order.getId());
+        dto.setOrderNumber(getDisplayOrderNumber(order));
+        dto.setStatus(order.getStatus());
+
+        paymentRepo.findByOrder_Id(order.getId()).ifPresent(p -> {
+            dto.setPaymentStatus(p.getStatus());
+            dto.setPaymentMethod(p.getMethod());
+        });
+
+        dto.setCustomerEmail(order.getCustomerEmail());
+        dto.setCustomerPhone(order.getCustomerPhone());
+        dto.setPreferredLanguage(order.getPreferredLanguage());
+        dto.setBillingCustomerType(order.getBillingCustomerType());
+        dto.setCurrency(order.getCurrency());
+        dto.setSetupCostChf(order.getSetupCostChf());
+        dto.setShippingCostChf(order.getShippingCostChf());
+        dto.setDiscountChf(order.getDiscountChf());
+        dto.setSubtotalChf(order.getSubtotalChf());
+        dto.setTotalChf(order.getTotalChf());
+        dto.setCreatedAt(order.getCreatedAt());
+        dto.setShippingSameAsBilling(order.getShippingSameAsBilling());
+
+        AddressDto billing = new AddressDto();
+        billing.setFirstName(order.getBillingFirstName());
+        billing.setLastName(order.getBillingLastName());
+        billing.setCompanyName(order.getBillingCompanyName());
+        billing.setContactPerson(order.getBillingContactPerson());
+        billing.setAddressLine1(order.getBillingAddressLine1());
+        billing.setAddressLine2(order.getBillingAddressLine2());
+        billing.setZip(order.getBillingZip());
+        billing.setCity(order.getBillingCity());
+        billing.setCountryCode(order.getBillingCountryCode());
+        dto.setBillingAddress(billing);
+
+        if (!order.getShippingSameAsBilling()) {
+            AddressDto shipping = new AddressDto();
+            shipping.setFirstName(order.getShippingFirstName());
+            shipping.setLastName(order.getShippingLastName());
+            shipping.setCompanyName(order.getShippingCompanyName());
+            shipping.setContactPerson(order.getShippingContactPerson());
+            shipping.setAddressLine1(order.getShippingAddressLine1());
+            shipping.setAddressLine2(order.getShippingAddressLine2());
+            shipping.setZip(order.getShippingZip());
+            shipping.setCity(order.getShippingCity());
+            shipping.setCountryCode(order.getShippingCountryCode());
+            dto.setShippingAddress(shipping);
+        }
+
+        List<OrderItemDto> itemDtos = items.stream().map(i -> {
+            OrderItemDto idto = new OrderItemDto();
+            idto.setId(i.getId());
+            idto.setOriginalFilename(i.getOriginalFilename());
+            idto.setMaterialCode(i.getMaterialCode());
+            idto.setColorCode(i.getColorCode());
+            idto.setQuantity(i.getQuantity());
+            idto.setPrintTimeSeconds(i.getPrintTimeSeconds());
+            idto.setMaterialGrams(i.getMaterialGrams());
+            idto.setUnitPriceChf(i.getUnitPriceChf());
+            idto.setLineTotalChf(i.getLineTotalChf());
+            return idto;
+        }).collect(Collectors.toList());
+        dto.setItems(itemDtos);
+
+        return dto;
+    }
+
+    private String getDisplayOrderNumber(Order order) {
+        String orderNumber = order.getOrderNumber();
+        if (orderNumber != null && !orderNumber.isBlank()) {
+            return orderNumber;
+        }
+        return order.getId() != null ? order.getId().toString() : "unknown";
+    }
+
+}

backend/src/main/java/com/printcalculator/controller/QuoteController.java

@@ -1,43 +1,89 @@
 package com.printcalculator.controller;
 
+import com.printcalculator.entity.PrinterMachine;
 import com.printcalculator.model.PrintStats;
 import com.printcalculator.model.QuoteResult;
+import com.printcalculator.repository.PrinterMachineRepository;
 import com.printcalculator.service.QuoteCalculator;
 import com.printcalculator.service.SlicerService;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 
+import java.util.Map;
+import java.util.HashMap;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
 @RestController
-@CrossOrigin(origins = "*") // Allow all for development
 public class QuoteController {
 
     private final SlicerService slicerService;
     private final QuoteCalculator quoteCalculator;
+    private final PrinterMachineRepository machineRepo;
+    private final com.printcalculator.service.ClamAVService clamAVService;
 
-    // Defaults
-    private static final String DEFAULT_MACHINE = "Bambu_Lab_A1_machine";
-    private static final String DEFAULT_FILAMENT = "Bambu_PLA_Basic";
-    private static final String DEFAULT_PROCESS = "Bambu_Process_0.20_Standard";
+    // Defaults (using aliases defined in ProfileManager)
+    private static final String DEFAULT_FILAMENT = "pla_basic";
+    private static final String DEFAULT_PROCESS = "standard";
 
-    public QuoteController(SlicerService slicerService, QuoteCalculator quoteCalculator) {
+    public QuoteController(SlicerService slicerService, QuoteCalculator quoteCalculator, PrinterMachineRepository machineRepo, com.printcalculator.service.ClamAVService clamAVService) {
         this.slicerService = slicerService;
         this.quoteCalculator = quoteCalculator;
+        this.machineRepo = machineRepo;
+        this.clamAVService = clamAVService;
     }
 
     @PostMapping("/api/quote")
     public ResponseEntity<QuoteResult> calculateQuote(
             @RequestParam("file") MultipartFile file,
-            @RequestParam(value = "machine", defaultValue = DEFAULT_MACHINE) String machine,
-            @RequestParam(value = "filament", defaultValue = DEFAULT_FILAMENT) String filament,
-            @RequestParam(value = "process", defaultValue = DEFAULT_PROCESS) String process
+            @RequestParam(value = "filament", required = false, defaultValue = DEFAULT_FILAMENT) String filament,
+            @RequestParam(value = "process", required = false) String process,
+            @RequestParam(value = "quality", required = false) String quality,
+            // Advanced Options
+            @RequestParam(value = "infill_density", required = false) Integer infillDensity,
+            @RequestParam(value = "infill_pattern", required = false) String infillPattern,
+            @RequestParam(value = "layer_height", required = false) Double layerHeight,
+            @RequestParam(value = "nozzle_diameter", required = false) Double nozzleDiameter,
+            @RequestParam(value = "support_enabled", required = false) Boolean supportEnabled
             ) throws IOException {
 
-        return processRequest(file, machine, filament, process);
+        // ... process selection logic ...
+        String actualProcess = process;
+        if (actualProcess == null || actualProcess.isEmpty()) {
+            if (quality != null && !quality.isEmpty()) {
+                actualProcess = quality;
+            } else {
+                actualProcess = DEFAULT_PROCESS;
+            }
+        }
+
+        // Prepare Overrides
+        Map<String, String> processOverrides = new HashMap<>();
+        Map<String, String> machineOverrides = new HashMap<>();
+
+        if (infillDensity != null) {
+            processOverrides.put("sparse_infill_density", infillDensity + "%");
+        }
+        if (infillPattern != null && !infillPattern.isEmpty()) {
+            processOverrides.put("sparse_infill_pattern", infillPattern);
+        }
+        if (layerHeight != null) {
+            processOverrides.put("layer_height", String.valueOf(layerHeight));
+        }
+        if (supportEnabled != null) {
+            processOverrides.put("enable_support", supportEnabled ? "1" : "0");
+        }
+
+        if (nozzleDiameter != null) {
+            machineOverrides.put("nozzle_diameter", String.valueOf(nozzleDiameter));
+            // Also need to ensure the printer profile is compatible or just override?
+            // Usually nozzle diameter changes require a different printer profile or deep overrides.
+            // For now, we trust the override key works on the base profile.
+        }
+
+        return processRequest(file, filament, actualProcess, machineOverrides, processOverrides);
     }
 
     @PostMapping("/calculate/stl")
@@ -45,30 +91,40 @@ public class QuoteController {
             @RequestParam("file") MultipartFile file
     ) throws IOException {
         // Legacy endpoint uses defaults
-        return processRequest(file, DEFAULT_MACHINE, DEFAULT_FILAMENT, DEFAULT_PROCESS);
+        return processRequest(file, DEFAULT_FILAMENT, DEFAULT_PROCESS, null, null);
     }
 
-    private ResponseEntity<QuoteResult> processRequest(MultipartFile file, String machine, String filament, String process) throws IOException {
+    private ResponseEntity<QuoteResult> processRequest(MultipartFile file, String filament, String process,
+                                                       Map<String, String> machineOverrides,
+                                                       Map<String, String> processOverrides) throws IOException {
         if (file.isEmpty()) {
             return ResponseEntity.badRequest().build();
         }
 
+        // Scan for virus
+        clamAVService.scan(file.getInputStream());
+
+        // Fetch Default Active Machine
+        PrinterMachine machine = machineRepo.findFirstByIsActiveTrue()
+                .orElseThrow(() -> new IOException("No active printer found in database"));
+
         // Save uploaded file temporarily
         Path tempInput = Files.createTempFile("upload_", "_" + file.getOriginalFilename());
         try {
             file.transferTo(tempInput.toFile());
 
-            // Slice
-            PrintStats stats = slicerService.slice(tempInput.toFile(), machine, filament, process);
+            String slicerMachineProfile = "bambu_a1"; // TODO: Add to PrinterMachine entity
+
+            PrintStats stats = slicerService.slice(tempInput.toFile(), slicerMachineProfile, filament, process, machineOverrides, processOverrides);
             
-            // Calculate Quote
-            QuoteResult result = quoteCalculator.calculate(stats);
+            // Calculate Quote (Pass machine display name for pricing lookup)
+            QuoteResult result = quoteCalculator.calculate(stats, machine.getPrinterDisplayName(), filament);
             
             return ResponseEntity.ok(result);
 
         } catch (Exception e) {
             e.printStackTrace();
-            return ResponseEntity.internalServerError().build(); // Simplify error handling for now
+            return ResponseEntity.internalServerError().build();
         } finally {
             Files.deleteIfExists(tempInput);
         }

backend/src/main/java/com/printcalculator/controller/QuoteSessionController.java

@@ -0,0 +1,534 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.FilamentMaterialType;
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.entity.QuoteLineItem;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.model.ModelDimensions;
+import com.printcalculator.model.PrintStats;
+import com.printcalculator.model.QuoteResult;
+import com.printcalculator.repository.FilamentMaterialTypeRepository;
+import com.printcalculator.repository.FilamentVariantRepository;
+import com.printcalculator.repository.PrinterMachineRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
+import com.printcalculator.repository.QuoteSessionRepository;
+import com.printcalculator.service.OrcaProfileResolver;
+import com.printcalculator.service.QuoteCalculator;
+import com.printcalculator.service.SlicerService;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.Optional;
+import java.util.Locale;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+
+@RestController
+@RequestMapping("/api/quote-sessions")
+
+public class QuoteSessionController {
+    private static final Path QUOTE_STORAGE_ROOT = Paths.get("storage_quotes").toAbsolutePath().normalize();
+
+    private final QuoteSessionRepository sessionRepo;
+    private final QuoteLineItemRepository lineItemRepo;
+    private final SlicerService slicerService;
+    private final QuoteCalculator quoteCalculator;
+    private final PrinterMachineRepository machineRepo;
+    private final FilamentMaterialTypeRepository materialRepo;
+    private final FilamentVariantRepository variantRepo;
+    private final OrcaProfileResolver orcaProfileResolver;
+    private final com.printcalculator.repository.PricingPolicyRepository pricingRepo;
+    private final com.printcalculator.service.ClamAVService clamAVService;
+
+    public QuoteSessionController(QuoteSessionRepository sessionRepo,
+                                  QuoteLineItemRepository lineItemRepo,
+                                  SlicerService slicerService,
+                                  QuoteCalculator quoteCalculator,
+                                  PrinterMachineRepository machineRepo,
+                                  FilamentMaterialTypeRepository materialRepo,
+                                  FilamentVariantRepository variantRepo,
+                                  OrcaProfileResolver orcaProfileResolver,
+                                  com.printcalculator.repository.PricingPolicyRepository pricingRepo,
+                                  com.printcalculator.service.ClamAVService clamAVService) {
+        this.sessionRepo = sessionRepo;
+        this.lineItemRepo = lineItemRepo;
+        this.slicerService = slicerService;
+        this.quoteCalculator = quoteCalculator;
+        this.machineRepo = machineRepo;
+        this.materialRepo = materialRepo;
+        this.variantRepo = variantRepo;
+        this.orcaProfileResolver = orcaProfileResolver;
+        this.pricingRepo = pricingRepo;
+        this.clamAVService = clamAVService;
+    }
+
+    // 1. Start a new empty session
+    @PostMapping(value = "")
+    @Transactional
+    public ResponseEntity<QuoteSession> createSession() {
+        QuoteSession session = new QuoteSession();
+        session.setStatus("ACTIVE");
+        session.setPricingVersion("v1");
+        // Default material/settings will be set when items are added or updated?
+        // For now set safe defaults
+        session.setMaterialCode("PLA"); 
+        session.setSupportsEnabled(false);
+        session.setCreatedAt(OffsetDateTime.now());
+        session.setExpiresAt(OffsetDateTime.now().plusDays(30)); 
+        
+        var policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
+        session.setSetupCostChf(quoteCalculator.calculateSessionSetupFee(policy));
+        
+        session = sessionRepo.save(session);
+        return ResponseEntity.ok(session);
+    }
+    
+    // 2. Add item to existing session
+    @PostMapping(value = "/{id}/line-items", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<QuoteLineItem> addItemToExistingSession(
+            @PathVariable UUID id,
+            @RequestPart("settings") com.printcalculator.dto.PrintSettingsDto settings,
+            @RequestPart("file") MultipartFile file
+    ) throws IOException {
+        QuoteSession session = sessionRepo.findById(id)
+                .orElseThrow(() -> new RuntimeException("Session not found"));
+
+        QuoteLineItem item = addItemToSession(session, file, settings);
+        return ResponseEntity.ok(item);
+    }
+
+    // Helper to add item
+    private QuoteLineItem addItemToSession(QuoteSession session, MultipartFile file, com.printcalculator.dto.PrintSettingsDto settings) throws IOException {
+        if (file.isEmpty()) throw new IOException("File is empty");
+
+        // Scan for virus
+        clamAVService.scan(file.getInputStream());
+
+        // 1. Define Persistent Storage Path
+        // Structure: storage_quotes/{sessionId}/{uuid}.{ext}
+        Path sessionStorageDir = QUOTE_STORAGE_ROOT.resolve(session.getId().toString()).normalize();
+        if (!sessionStorageDir.startsWith(QUOTE_STORAGE_ROOT)) {
+            throw new IOException("Invalid quote session storage path");
+        }
+        Files.createDirectories(sessionStorageDir);
+
+        String originalFilename = file.getOriginalFilename();
+        String ext = getSafeExtension(originalFilename, "stl");
+        String storedFilename = UUID.randomUUID() + "." + ext;
+        Path persistentPath = sessionStorageDir.resolve(storedFilename).normalize();
+        if (!persistentPath.startsWith(sessionStorageDir)) {
+            throw new IOException("Invalid quote line-item storage path");
+        }
+
+        // Save file
+        try (InputStream inputStream = file.getInputStream()) {
+            Files.copy(inputStream, persistentPath, StandardCopyOption.REPLACE_EXISTING);
+        }
+
+        try {
+            // Apply Basic/Advanced Logic
+            applyPrintSettings(settings);
+
+            BigDecimal nozzleDiameter = BigDecimal.valueOf(settings.getNozzleDiameter() != null ? settings.getNozzleDiameter() : 0.4);
+
+            // Pick machine (selected machine if provided, otherwise first active)
+            PrinterMachine machine = resolvePrinterMachine(settings.getPrinterMachineId());
+
+            // Resolve selected filament variant
+            FilamentVariant selectedVariant = resolveFilamentVariant(settings);
+
+            // Update session global settings from the most recent item added
+            session.setMaterialCode(selectedVariant.getFilamentMaterialType().getMaterialCode());
+            session.setNozzleDiameterMm(nozzleDiameter);
+            session.setLayerHeightMm(BigDecimal.valueOf(settings.getLayerHeight() != null ? settings.getLayerHeight() : 0.2));
+            session.setInfillPattern(settings.getInfillPattern());
+            session.setInfillPercent(settings.getInfillDensity() != null ? settings.getInfillDensity().intValue() : 20);
+            session.setSupportsEnabled(settings.getSupportsEnabled() != null ? settings.getSupportsEnabled() : false);
+            sessionRepo.save(session);
+
+            OrcaProfileResolver.ResolvedProfiles profiles = orcaProfileResolver.resolve(machine, nozzleDiameter, selectedVariant);
+            String machineProfile = profiles.machineProfileName();
+            String filamentProfile = profiles.filamentProfileName();
+
+            String processProfile = "standard";
+            if (settings.getLayerHeight() != null) {
+                 if (settings.getLayerHeight() >= 0.28) processProfile = "draft";
+                 else if (settings.getLayerHeight() <= 0.12) processProfile = "extra_fine";
+            }
+            
+            // Build overrides map from settings
+            Map<String, String> processOverrides = new HashMap<>();
+            if (settings.getLayerHeight() != null) processOverrides.put("layer_height", String.valueOf(settings.getLayerHeight()));
+            if (settings.getInfillDensity() != null) processOverrides.put("sparse_infill_density", settings.getInfillDensity() + "%");
+            if (settings.getInfillPattern() != null) processOverrides.put("sparse_infill_pattern", settings.getInfillPattern());
+            
+            // 3. Slice (Use persistent path)
+            PrintStats stats = slicerService.slice(
+                persistentPath.toFile(), 
+                machineProfile, 
+                filamentProfile, 
+                processProfile, 
+                null, // machine overrides
+                processOverrides
+            );
+
+            Optional<ModelDimensions> modelDimensions = slicerService.inspectModelDimensions(persistentPath.toFile());
+            
+            // 4. Calculate Quote
+            QuoteResult result = quoteCalculator.calculate(stats, machine.getPrinterDisplayName(), selectedVariant);
+
+            // 5. Create Line Item
+            QuoteLineItem item = new QuoteLineItem();
+            item.setQuoteSession(session);
+            item.setOriginalFilename(file.getOriginalFilename());
+            item.setStoredPath(QUOTE_STORAGE_ROOT.relativize(persistentPath).toString()); // SAVE PATH (relative to root)
+            item.setQuantity(1);
+            item.setColorCode(selectedVariant.getColorName());
+            item.setFilamentVariant(selectedVariant);
+            item.setStatus("READY"); // or CALCULATED
+            
+            item.setPrintTimeSeconds((int) stats.printTimeSeconds());
+            item.setMaterialGrams(BigDecimal.valueOf(stats.filamentWeightGrams()));
+            item.setUnitPriceChf(BigDecimal.valueOf(result.getTotalPrice()));
+            
+            // Store breakdown
+            Map<String, Object> breakdown = new HashMap<>();
+            breakdown.put("machine_cost", result.getTotalPrice()); // Excludes setup fee which is at session level
+            breakdown.put("setup_fee", 0);
+            item.setPricingBreakdown(breakdown);
+            
+            // Dimensions for shipping/package checks are computed server-side from the uploaded model.
+            item.setBoundingBoxXMm(modelDimensions
+                    .map(dim -> BigDecimal.valueOf(dim.xMm()))
+                    .orElseGet(() -> settings.getBoundingBoxX() != null ? BigDecimal.valueOf(settings.getBoundingBoxX()) : BigDecimal.ZERO));
+            item.setBoundingBoxYMm(modelDimensions
+                    .map(dim -> BigDecimal.valueOf(dim.yMm()))
+                    .orElseGet(() -> settings.getBoundingBoxY() != null ? BigDecimal.valueOf(settings.getBoundingBoxY()) : BigDecimal.ZERO));
+            item.setBoundingBoxZMm(modelDimensions
+                    .map(dim -> BigDecimal.valueOf(dim.zMm()))
+                    .orElseGet(() -> settings.getBoundingBoxZ() != null ? BigDecimal.valueOf(settings.getBoundingBoxZ()) : BigDecimal.ZERO));
+            
+            item.setCreatedAt(OffsetDateTime.now());
+            item.setUpdatedAt(OffsetDateTime.now());
+            
+            return lineItemRepo.save(item);
+
+        } catch (Exception e) {
+            // Cleanup if failed
+            Files.deleteIfExists(persistentPath);
+            throw e;
+        }
+    }
+
+    private void applyPrintSettings(com.printcalculator.dto.PrintSettingsDto settings) {
+        if ("BASIC".equalsIgnoreCase(settings.getComplexityMode())) {
+            // Set defaults based on Quality
+            String quality = settings.getQuality() != null ? settings.getQuality().toLowerCase() : "standard";
+            
+            switch (quality) {
+                case "draft":
+                    settings.setLayerHeight(0.28);
+                    settings.setInfillDensity(15.0);
+                    settings.setInfillPattern("grid");
+                    break;
+                case "high":
+                    settings.setLayerHeight(0.12);
+                    settings.setInfillDensity(20.0);
+                    settings.setInfillPattern("gyroid");
+                    break;
+                case "standard":
+                default:
+                    settings.setLayerHeight(0.20);
+                    settings.setInfillDensity(15.0);
+                    settings.setInfillPattern("grid");
+                    break;
+            }
+        } else {
+            // ADVANCED Mode: Use values from Frontend, set defaults if missing
+            if (settings.getLayerHeight() == null) settings.setLayerHeight(0.20);
+            if (settings.getInfillDensity() == null) settings.setInfillDensity(20.0);
+            if (settings.getInfillPattern() == null) settings.setInfillPattern("grid");
+        }
+    }
+
+    private PrinterMachine resolvePrinterMachine(Long printerMachineId) {
+        if (printerMachineId != null) {
+            PrinterMachine selected = machineRepo.findById(printerMachineId)
+                    .orElseThrow(() -> new RuntimeException("Printer machine not found: " + printerMachineId));
+            if (!Boolean.TRUE.equals(selected.getIsActive())) {
+                throw new RuntimeException("Selected printer machine is not active");
+            }
+            return selected;
+        }
+
+        return machineRepo.findFirstByIsActiveTrue()
+                .orElseThrow(() -> new RuntimeException("No active printer found"));
+    }
+
+    private FilamentVariant resolveFilamentVariant(com.printcalculator.dto.PrintSettingsDto settings) {
+        if (settings.getFilamentVariantId() != null) {
+            FilamentVariant variant = variantRepo.findById(settings.getFilamentVariantId())
+                    .orElseThrow(() -> new RuntimeException("Filament variant not found: " + settings.getFilamentVariantId()));
+            if (!Boolean.TRUE.equals(variant.getIsActive())) {
+                throw new RuntimeException("Selected filament variant is not active");
+            }
+            return variant;
+        }
+
+        String requestedMaterialCode = normalizeRequestedMaterialCode(settings.getMaterial());
+
+        FilamentMaterialType materialType = materialRepo.findByMaterialCode(requestedMaterialCode)
+                .orElseGet(() -> materialRepo.findByMaterialCode("PLA")
+                        .orElseThrow(() -> new RuntimeException("Fallback material PLA not configured")));
+
+        String requestedColor = settings.getColor() != null ? settings.getColor().trim() : null;
+        if (requestedColor != null && !requestedColor.isBlank()) {
+            Optional<FilamentVariant> byColor = variantRepo.findByFilamentMaterialTypeAndColorName(materialType, requestedColor);
+            if (byColor.isPresent() && Boolean.TRUE.equals(byColor.get().getIsActive())) {
+                return byColor.get();
+            }
+        }
+
+        return variantRepo.findFirstByFilamentMaterialTypeAndIsActiveTrue(materialType)
+                .orElseThrow(() -> new RuntimeException("No active variant for material: " + requestedMaterialCode));
+    }
+
+    private String normalizeRequestedMaterialCode(String value) {
+        if (value == null || value.isBlank()) {
+            return "PLA";
+        }
+
+        return value.trim()
+                .toUpperCase(Locale.ROOT)
+                .replace('_', ' ')
+                .replace('-', ' ')
+                .replaceAll("\\s+", " ");
+    }
+
+    // 3. Update Line Item
+    @PatchMapping("/line-items/{lineItemId}")
+    @Transactional
+    public ResponseEntity<QuoteLineItem> updateLineItem(
+            @PathVariable UUID lineItemId,
+            @RequestBody Map<String, Object> updates
+    ) {
+        QuoteLineItem item = lineItemRepo.findById(lineItemId)
+                .orElseThrow(() -> new RuntimeException("Item not found"));
+        
+        if (updates.containsKey("quantity")) {
+            item.setQuantity((Integer) updates.get("quantity"));
+        }
+        if (updates.containsKey("color_code")) {
+            item.setColorCode((String) updates.get("color_code"));
+        }
+        
+        // Recalculate price if needed? 
+        // For now, unit price is fixed in mock. Total is calculated on GET.
+        
+        item.setUpdatedAt(OffsetDateTime.now());
+        return ResponseEntity.ok(lineItemRepo.save(item));
+    }
+    
+    // 4. Delete Line Item
+    @DeleteMapping("/{sessionId}/line-items/{lineItemId}")
+    @Transactional
+    public ResponseEntity<Void> deleteLineItem(
+            @PathVariable UUID sessionId,
+            @PathVariable UUID lineItemId
+    ) {
+        // Verify item belongs to session?
+        QuoteLineItem item = lineItemRepo.findById(lineItemId)
+                .orElseThrow(() -> new RuntimeException("Item not found"));
+        
+        if (!item.getQuoteSession().getId().equals(sessionId)) {
+            return ResponseEntity.badRequest().build();
+        }
+        
+        lineItemRepo.delete(item);
+        return ResponseEntity.noContent().build();
+    }
+    
+    // 5. Get Session (Session + Items + Total)
+    @GetMapping("/{id}")
+    public ResponseEntity<Map<String, Object>> getQuoteSession(@PathVariable UUID id) {
+        QuoteSession session = sessionRepo.findById(id)
+                .orElseThrow(() -> new RuntimeException("Session not found"));
+        
+        List<QuoteLineItem> items = lineItemRepo.findByQuoteSessionId(id);
+        
+        // Calculate Totals and global session hours
+        BigDecimal itemsTotal = BigDecimal.ZERO;
+        BigDecimal totalSeconds = BigDecimal.ZERO;
+
+        for (QuoteLineItem item : items) {
+            BigDecimal lineTotal = item.getUnitPriceChf().multiply(BigDecimal.valueOf(item.getQuantity()));
+            itemsTotal = itemsTotal.add(lineTotal);
+            
+            if (item.getPrintTimeSeconds() != null) {
+                totalSeconds = totalSeconds.add(BigDecimal.valueOf(item.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(item.getQuantity())));
+            }
+        }
+        
+        BigDecimal totalHours = totalSeconds.divide(BigDecimal.valueOf(3600), 4, RoundingMode.HALF_UP);
+        com.printcalculator.entity.PricingPolicy policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
+        BigDecimal globalMachineCost = quoteCalculator.calculateSessionMachineCost(policy, totalHours);
+        
+        itemsTotal = itemsTotal.add(globalMachineCost);
+        
+        // Map items to DTO to embed distributed machine cost
+        List<Map<String, Object>> itemsDto = new ArrayList<>();
+        for (QuoteLineItem item : items) {
+            Map<String, Object> dto = new HashMap<>();
+            dto.put("id", item.getId());
+            dto.put("originalFilename", item.getOriginalFilename());
+            dto.put("quantity", item.getQuantity());
+            dto.put("printTimeSeconds", item.getPrintTimeSeconds());
+            dto.put("materialGrams", item.getMaterialGrams());
+            dto.put("colorCode", item.getColorCode());
+            dto.put("filamentVariantId", item.getFilamentVariant() != null ? item.getFilamentVariant().getId() : null);
+            dto.put("status", item.getStatus());
+            
+            BigDecimal unitPrice = item.getUnitPriceChf();
+            if (totalSeconds.compareTo(BigDecimal.ZERO) > 0 && item.getPrintTimeSeconds() != null) {
+                BigDecimal itemSeconds = BigDecimal.valueOf(item.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(item.getQuantity()));
+                BigDecimal share = itemSeconds.divide(totalSeconds, 8, RoundingMode.HALF_UP);
+                BigDecimal itemMachineCost = globalMachineCost.multiply(share);
+                BigDecimal unitMachineCost = itemMachineCost.divide(BigDecimal.valueOf(item.getQuantity()), 2, RoundingMode.HALF_UP);
+                unitPrice = unitPrice.add(unitMachineCost);
+            }
+            dto.put("unitPriceChf", unitPrice);
+            itemsDto.add(dto);
+        }
+        
+        BigDecimal setupFee = session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO;
+        
+        // Calculate shipping cost based on dimensions
+        boolean exceedsBaseSize = false;
+        for (QuoteLineItem item : items) {
+            BigDecimal x = item.getBoundingBoxXMm() != null ? item.getBoundingBoxXMm() : BigDecimal.ZERO;
+            BigDecimal y = item.getBoundingBoxYMm() != null ? item.getBoundingBoxYMm() : BigDecimal.ZERO;
+            BigDecimal z = item.getBoundingBoxZMm() != null ? item.getBoundingBoxZMm() : BigDecimal.ZERO;
+            
+            BigDecimal[] dims = {x, y, z};
+            java.util.Arrays.sort(dims);
+            
+            if (dims[2].compareTo(BigDecimal.valueOf(250.0)) > 0 ||
+                dims[1].compareTo(BigDecimal.valueOf(176.0)) > 0 ||
+                dims[0].compareTo(BigDecimal.valueOf(20.0)) > 0) {
+                exceedsBaseSize = true;
+                break;
+            }
+        }
+        int totalQuantity = items.stream()
+                .mapToInt(i -> i.getQuantity() != null ? i.getQuantity() : 1)
+                .sum();
+
+        BigDecimal shippingCostChf;
+        if (exceedsBaseSize) {
+            shippingCostChf = totalQuantity > 5 ? BigDecimal.valueOf(9.00) : BigDecimal.valueOf(4.00);
+        } else {
+            shippingCostChf = BigDecimal.valueOf(2.00);
+        }
+
+        BigDecimal grandTotal = itemsTotal.add(setupFee).add(shippingCostChf);
+        
+        Map<String, Object> response = new HashMap<>();
+        response.put("session", session);
+        response.put("items", itemsDto);
+        response.put("itemsTotalChf", itemsTotal); // Includes the base cost of all items + the global tiered machine cost
+        response.put("shippingCostChf", shippingCostChf);
+        response.put("globalMachineCostChf", globalMachineCost); // Provide it so frontend knows how much it was (optional now)
+        response.put("grandTotalChf", grandTotal);
+        
+        return ResponseEntity.ok(response);
+    }
+
+    // 6. Download Line Item Content
+    @GetMapping(value = "/{sessionId}/line-items/{lineItemId}/content")
+    public ResponseEntity<org.springframework.core.io.Resource> downloadLineItemContent(
+            @PathVariable UUID sessionId,
+            @PathVariable UUID lineItemId
+    ) throws IOException {
+        QuoteLineItem item = lineItemRepo.findById(lineItemId)
+                .orElseThrow(() -> new RuntimeException("Item not found"));
+
+        if (!item.getQuoteSession().getId().equals(sessionId)) {
+            return ResponseEntity.badRequest().build();
+        }
+
+        if (item.getStoredPath() == null) {
+            return ResponseEntity.notFound().build();
+        }
+
+        Path path = resolveStoredQuotePath(item.getStoredPath(), sessionId);
+        if (path == null || !Files.exists(path)) {
+            return ResponseEntity.notFound().build();
+        }
+
+        org.springframework.core.io.Resource resource = new UrlResource(path.toUri());
+
+        return ResponseEntity.ok()
+                .contentType(MediaType.APPLICATION_OCTET_STREAM)
+                .header(org.springframework.http.HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + item.getOriginalFilename() + "\"")
+                .body(resource);
+    }
+
+    private String getSafeExtension(String filename, String fallback) {
+        if (filename == null) {
+            return fallback;
+        }
+        String cleaned = StringUtils.cleanPath(filename);
+        if (cleaned.contains("..")) {
+            return fallback;
+        }
+        int index = cleaned.lastIndexOf('.');
+        if (index <= 0 || index >= cleaned.length() - 1) {
+            return fallback;
+        }
+        String ext = cleaned.substring(index + 1).toLowerCase(Locale.ROOT);
+        return switch (ext) {
+            case "stl" -> "stl";
+            case "3mf" -> "3mf";
+            case "step", "stp" -> "step";
+            default -> fallback;
+        };
+    }
+
+    private Path resolveStoredQuotePath(String storedPath, UUID expectedSessionId) {
+        if (storedPath == null || storedPath.isBlank()) {
+            return null;
+        }
+        try {
+            Path raw = Path.of(storedPath).normalize();
+            Path resolved = raw.isAbsolute() ? raw : QUOTE_STORAGE_ROOT.resolve(raw).normalize();
+            Path expectedSessionRoot = QUOTE_STORAGE_ROOT.resolve(expectedSessionId.toString()).normalize();
+            if (!resolved.startsWith(expectedSessionRoot)) {
+                return null;
+            }
+            return resolved;
+        } catch (InvalidPathException e) {
+            return null;
+        }
+    }
+}

backend/src/main/java/com/printcalculator/controller/admin/AdminAuthController.java

@@ -0,0 +1,83 @@
+package com.printcalculator.controller.admin;
+
+import com.printcalculator.dto.AdminLoginRequest;
+import com.printcalculator.security.AdminLoginThrottleService;
+import com.printcalculator.security.AdminSessionService;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import jakarta.validation.Valid;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Map;
+import java.util.OptionalLong;
+
+@RestController
+@RequestMapping("/api/admin/auth")
+public class AdminAuthController {
+
+    private final AdminSessionService adminSessionService;
+    private final AdminLoginThrottleService adminLoginThrottleService;
+
+    public AdminAuthController(
+            AdminSessionService adminSessionService,
+            AdminLoginThrottleService adminLoginThrottleService
+    ) {
+        this.adminSessionService = adminSessionService;
+        this.adminLoginThrottleService = adminLoginThrottleService;
+    }
+
+    @PostMapping("/login")
+    public ResponseEntity<Map<String, Object>> login(
+            @Valid @RequestBody AdminLoginRequest request,
+            HttpServletRequest httpRequest,
+            HttpServletResponse response
+    ) {
+        String clientKey = adminLoginThrottleService.resolveClientKey(httpRequest);
+        OptionalLong remainingLock = adminLoginThrottleService.getRemainingLockSeconds(clientKey);
+        if (remainingLock.isPresent()) {
+            long retryAfter = remainingLock.getAsLong();
+            return ResponseEntity.status(429)
+                    .header(HttpHeaders.RETRY_AFTER, String.valueOf(retryAfter))
+                    .body(Map.of(
+                            "authenticated", false,
+                            "retryAfterSeconds", retryAfter
+                    ));
+        }
+
+        if (!adminSessionService.isPasswordValid(request.getPassword())) {
+            long retryAfter = adminLoginThrottleService.registerFailure(clientKey);
+            return ResponseEntity.status(401)
+                    .header(HttpHeaders.RETRY_AFTER, String.valueOf(retryAfter))
+                    .body(Map.of(
+                            "authenticated", false,
+                            "retryAfterSeconds", retryAfter
+                    ));
+        }
+
+        adminLoginThrottleService.reset(clientKey);
+        String token = adminSessionService.createSessionToken();
+        response.addHeader(HttpHeaders.SET_COOKIE, adminSessionService.buildLoginCookie(token).toString());
+
+        return ResponseEntity.ok(Map.of(
+                "authenticated", true,
+                "expiresInMinutes", adminSessionService.getSessionTtlMinutes()
+        ));
+    }
+
+    @PostMapping("/logout")
+    public ResponseEntity<Map<String, Object>> logout(HttpServletResponse response) {
+        response.addHeader(HttpHeaders.SET_COOKIE, adminSessionService.buildLogoutCookie().toString());
+        return ResponseEntity.ok(Map.of("authenticated", false));
+    }
+
+    @GetMapping("/me")
+    public ResponseEntity<Map<String, Object>> me() {
+        return ResponseEntity.ok(Map.of("authenticated", true));
+    }
+}

backend/src/main/java/com/printcalculator/controller/admin/AdminFilamentController.java

@@ -0,0 +1,355 @@
+package com.printcalculator.controller.admin;
+
+import com.printcalculator.dto.AdminFilamentMaterialTypeDto;
+import com.printcalculator.dto.AdminFilamentVariantDto;
+import com.printcalculator.dto.AdminUpsertFilamentMaterialTypeRequest;
+import com.printcalculator.dto.AdminUpsertFilamentVariantRequest;
+import com.printcalculator.entity.FilamentMaterialType;
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.repository.FilamentMaterialTypeRepository;
+import com.printcalculator.repository.FilamentVariantRepository;
+import com.printcalculator.repository.OrderItemRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.regex.Pattern;
+
+import static org.springframework.http.HttpStatus.BAD_REQUEST;
+import static org.springframework.http.HttpStatus.CONFLICT;
+import static org.springframework.http.HttpStatus.NOT_FOUND;
+
+@RestController
+@RequestMapping("/api/admin/filaments")
+@Transactional(readOnly = true)
+public class AdminFilamentController {
+    private static final BigDecimal MAX_NUMERIC_6_3 = new BigDecimal("999.999");
+    private static final Pattern HEX_COLOR_PATTERN = Pattern.compile("^#[0-9A-Fa-f]{6}$");
+    private static final Set<String> ALLOWED_FINISH_TYPES = Set.of(
+            "GLOSSY", "MATTE", "MARBLE", "SILK", "TRANSLUCENT", "SPECIAL"
+    );
+
+    private final FilamentMaterialTypeRepository materialRepo;
+    private final FilamentVariantRepository variantRepo;
+    private final QuoteLineItemRepository quoteLineItemRepo;
+    private final OrderItemRepository orderItemRepo;
+
+    public AdminFilamentController(
+            FilamentMaterialTypeRepository materialRepo,
+            FilamentVariantRepository variantRepo,
+            QuoteLineItemRepository quoteLineItemRepo,
+            OrderItemRepository orderItemRepo
+    ) {
+        this.materialRepo = materialRepo;
+        this.variantRepo = variantRepo;
+        this.quoteLineItemRepo = quoteLineItemRepo;
+        this.orderItemRepo = orderItemRepo;
+    }
+
+    @GetMapping("/materials")
+    public ResponseEntity<List<AdminFilamentMaterialTypeDto>> getMaterials() {
+        List<AdminFilamentMaterialTypeDto> response = materialRepo.findAll().stream()
+                .sorted(Comparator.comparing(FilamentMaterialType::getMaterialCode, String.CASE_INSENSITIVE_ORDER))
+                .map(this::toMaterialDto)
+                .toList();
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/variants")
+    public ResponseEntity<List<AdminFilamentVariantDto>> getVariants() {
+        List<AdminFilamentVariantDto> response = variantRepo.findAll().stream()
+                .sorted(Comparator
+                        .comparing((FilamentVariant v) -> {
+                            FilamentMaterialType type = v.getFilamentMaterialType();
+                            return type != null && type.getMaterialCode() != null ? type.getMaterialCode() : "";
+                        }, String.CASE_INSENSITIVE_ORDER)
+                        .thenComparing(v -> v.getVariantDisplayName() != null ? v.getVariantDisplayName() : "", String.CASE_INSENSITIVE_ORDER))
+                .map(this::toVariantDto)
+                .toList();
+        return ResponseEntity.ok(response);
+    }
+
+    @PostMapping("/materials")
+    @Transactional
+    public ResponseEntity<AdminFilamentMaterialTypeDto> createMaterial(
+            @RequestBody AdminUpsertFilamentMaterialTypeRequest payload
+    ) {
+        String materialCode = normalizeAndValidateMaterialCode(payload);
+        ensureMaterialCodeAvailable(materialCode, null);
+
+        FilamentMaterialType material = new FilamentMaterialType();
+        applyMaterialPayload(material, payload, materialCode);
+        FilamentMaterialType saved = materialRepo.save(material);
+        return ResponseEntity.ok(toMaterialDto(saved));
+    }
+
+    @PutMapping("/materials/{materialTypeId}")
+    @Transactional
+    public ResponseEntity<AdminFilamentMaterialTypeDto> updateMaterial(
+            @PathVariable Long materialTypeId,
+            @RequestBody AdminUpsertFilamentMaterialTypeRequest payload
+    ) {
+        FilamentMaterialType material = materialRepo.findById(materialTypeId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Filament material not found"));
+
+        String materialCode = normalizeAndValidateMaterialCode(payload);
+        ensureMaterialCodeAvailable(materialCode, materialTypeId);
+
+        applyMaterialPayload(material, payload, materialCode);
+        FilamentMaterialType saved = materialRepo.save(material);
+        return ResponseEntity.ok(toMaterialDto(saved));
+    }
+
+    @PostMapping("/variants")
+    @Transactional
+    public ResponseEntity<AdminFilamentVariantDto> createVariant(
+            @RequestBody AdminUpsertFilamentVariantRequest payload
+    ) {
+        FilamentMaterialType material = validateAndResolveMaterial(payload);
+        String normalizedDisplayName = normalizeAndValidateVariantDisplayName(payload.getVariantDisplayName());
+        String normalizedColorName = normalizeAndValidateColorName(payload.getColorName());
+        validateNumericPayload(payload);
+        ensureVariantDisplayNameAvailable(material, normalizedDisplayName, null);
+
+        FilamentVariant variant = new FilamentVariant();
+        variant.setCreatedAt(OffsetDateTime.now());
+        applyVariantPayload(variant, payload, material, normalizedDisplayName, normalizedColorName);
+        FilamentVariant saved = variantRepo.save(variant);
+        return ResponseEntity.ok(toVariantDto(saved));
+    }
+
+    @PutMapping("/variants/{variantId}")
+    @Transactional
+    public ResponseEntity<AdminFilamentVariantDto> updateVariant(
+            @PathVariable Long variantId,
+            @RequestBody AdminUpsertFilamentVariantRequest payload
+    ) {
+        FilamentVariant variant = variantRepo.findById(variantId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Filament variant not found"));
+
+        FilamentMaterialType material = validateAndResolveMaterial(payload);
+        String normalizedDisplayName = normalizeAndValidateVariantDisplayName(payload.getVariantDisplayName());
+        String normalizedColorName = normalizeAndValidateColorName(payload.getColorName());
+        validateNumericPayload(payload);
+        ensureVariantDisplayNameAvailable(material, normalizedDisplayName, variantId);
+
+        applyVariantPayload(variant, payload, material, normalizedDisplayName, normalizedColorName);
+        FilamentVariant saved = variantRepo.save(variant);
+        return ResponseEntity.ok(toVariantDto(saved));
+    }
+
+    @DeleteMapping("/variants/{variantId}")
+    @Transactional
+    public ResponseEntity<Void> deleteVariant(@PathVariable Long variantId) {
+        FilamentVariant variant = variantRepo.findById(variantId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Filament variant not found"));
+
+        if (quoteLineItemRepo.existsByFilamentVariant_Id(variantId) || orderItemRepo.existsByFilamentVariant_Id(variantId)) {
+            throw new ResponseStatusException(CONFLICT, "Variant is already used in quotes/orders and cannot be deleted");
+        }
+
+        variantRepo.delete(variant);
+        return ResponseEntity.noContent().build();
+    }
+
+    private void applyMaterialPayload(
+            FilamentMaterialType material,
+            AdminUpsertFilamentMaterialTypeRequest payload,
+            String normalizedMaterialCode
+    ) {
+        boolean isFlexible = payload != null && Boolean.TRUE.equals(payload.getIsFlexible());
+        boolean isTechnical = payload != null && Boolean.TRUE.equals(payload.getIsTechnical());
+        String technicalTypeLabel = payload != null && payload.getTechnicalTypeLabel() != null
+                ? payload.getTechnicalTypeLabel().trim()
+                : null;
+
+        material.setMaterialCode(normalizedMaterialCode);
+        material.setIsFlexible(isFlexible);
+        material.setIsTechnical(isTechnical);
+        material.setTechnicalTypeLabel(isTechnical && technicalTypeLabel != null && !technicalTypeLabel.isBlank()
+                ? technicalTypeLabel
+                : null);
+    }
+
+    private void applyVariantPayload(
+            FilamentVariant variant,
+            AdminUpsertFilamentVariantRequest payload,
+            FilamentMaterialType material,
+            String normalizedDisplayName,
+            String normalizedColorName
+    ) {
+        String normalizedColorHex = normalizeAndValidateColorHex(payload.getColorHex());
+        String normalizedFinishType = normalizeAndValidateFinishType(payload.getFinishType(), payload.getIsMatte());
+        String normalizedBrand = normalizeOptional(payload.getBrand());
+
+        variant.setFilamentMaterialType(material);
+        variant.setVariantDisplayName(normalizedDisplayName);
+        variant.setColorName(normalizedColorName);
+        variant.setColorHex(normalizedColorHex);
+        variant.setFinishType(normalizedFinishType);
+        variant.setBrand(normalizedBrand);
+        variant.setIsMatte(Boolean.TRUE.equals(payload.getIsMatte()) || "MATTE".equals(normalizedFinishType));
+        variant.setIsSpecial(Boolean.TRUE.equals(payload.getIsSpecial()));
+        variant.setCostChfPerKg(payload.getCostChfPerKg());
+        variant.setStockSpools(payload.getStockSpools());
+        variant.setSpoolNetKg(payload.getSpoolNetKg());
+        variant.setIsActive(payload.getIsActive() == null || payload.getIsActive());
+    }
+
+    private String normalizeAndValidateMaterialCode(AdminUpsertFilamentMaterialTypeRequest payload) {
+        if (payload == null || payload.getMaterialCode() == null || payload.getMaterialCode().isBlank()) {
+            throw new ResponseStatusException(BAD_REQUEST, "Material code is required");
+        }
+        return payload.getMaterialCode().trim().toUpperCase();
+    }
+
+    private String normalizeAndValidateVariantDisplayName(String value) {
+        if (value == null || value.isBlank()) {
+            throw new ResponseStatusException(BAD_REQUEST, "Variant display name is required");
+        }
+        return value.trim();
+    }
+
+    private String normalizeAndValidateColorName(String value) {
+        if (value == null || value.isBlank()) {
+            throw new ResponseStatusException(BAD_REQUEST, "Color name is required");
+        }
+        return value.trim();
+    }
+
+    private String normalizeAndValidateColorHex(String value) {
+        if (value == null || value.isBlank()) {
+            return null;
+        }
+        String normalized = value.trim();
+        if (!HEX_COLOR_PATTERN.matcher(normalized).matches()) {
+            throw new ResponseStatusException(BAD_REQUEST, "Color hex must be in format #RRGGBB");
+        }
+        return normalized.toUpperCase(Locale.ROOT);
+    }
+
+    private String normalizeAndValidateFinishType(String finishType, Boolean isMatte) {
+        String normalized = finishType == null || finishType.isBlank()
+                ? (Boolean.TRUE.equals(isMatte) ? "MATTE" : "GLOSSY")
+                : finishType.trim().toUpperCase(Locale.ROOT);
+        if (!ALLOWED_FINISH_TYPES.contains(normalized)) {
+            throw new ResponseStatusException(BAD_REQUEST, "Invalid finish type");
+        }
+        return normalized;
+    }
+
+    private String normalizeOptional(String value) {
+        if (value == null) {
+            return null;
+        }
+        String normalized = value.trim();
+        return normalized.isBlank() ? null : normalized;
+    }
+
+    private FilamentMaterialType validateAndResolveMaterial(AdminUpsertFilamentVariantRequest payload) {
+        if (payload == null || payload.getMaterialTypeId() == null) {
+            throw new ResponseStatusException(BAD_REQUEST, "Material type id is required");
+        }
+
+        return materialRepo.findById(payload.getMaterialTypeId())
+                .orElseThrow(() -> new ResponseStatusException(BAD_REQUEST, "Material type not found"));
+    }
+
+    private void validateNumericPayload(AdminUpsertFilamentVariantRequest payload) {
+        if (payload.getCostChfPerKg() == null || payload.getCostChfPerKg().compareTo(BigDecimal.ZERO) < 0) {
+            throw new ResponseStatusException(BAD_REQUEST, "Cost CHF/kg must be >= 0");
+        }
+        validateNumeric63(payload.getStockSpools(), "Stock spools", true);
+        validateNumeric63(payload.getSpoolNetKg(), "Spool net kg", false);
+    }
+
+    private void validateNumeric63(BigDecimal value, String fieldName, boolean allowZero) {
+        if (value == null) {
+            throw new ResponseStatusException(BAD_REQUEST, fieldName + " is required");
+        }
+
+        if (allowZero) {
+            if (value.compareTo(BigDecimal.ZERO) < 0) {
+                throw new ResponseStatusException(BAD_REQUEST, fieldName + " must be >= 0");
+            }
+        } else if (value.compareTo(BigDecimal.ZERO) <= 0) {
+            throw new ResponseStatusException(BAD_REQUEST, fieldName + " must be > 0");
+        }
+
+        if (value.scale() > 3) {
+            throw new ResponseStatusException(BAD_REQUEST, fieldName + " must have at most 3 decimal places");
+        }
+
+        if (value.compareTo(MAX_NUMERIC_6_3) > 0) {
+            throw new ResponseStatusException(BAD_REQUEST, fieldName + " must be <= 999.999");
+        }
+    }
+
+    private void ensureMaterialCodeAvailable(String materialCode, Long currentMaterialId) {
+        materialRepo.findByMaterialCode(materialCode).ifPresent(existing -> {
+            if (currentMaterialId == null || !existing.getId().equals(currentMaterialId)) {
+                throw new ResponseStatusException(BAD_REQUEST, "Material code already exists");
+            }
+        });
+    }
+
+    private void ensureVariantDisplayNameAvailable(FilamentMaterialType material, String displayName, Long currentVariantId) {
+        variantRepo.findByFilamentMaterialTypeAndVariantDisplayName(material, displayName).ifPresent(existing -> {
+            if (currentVariantId == null || !existing.getId().equals(currentVariantId)) {
+                throw new ResponseStatusException(BAD_REQUEST, "Variant display name already exists for this material");
+            }
+        });
+    }
+
+    private AdminFilamentMaterialTypeDto toMaterialDto(FilamentMaterialType material) {
+        AdminFilamentMaterialTypeDto dto = new AdminFilamentMaterialTypeDto();
+        dto.setId(material.getId());
+        dto.setMaterialCode(material.getMaterialCode());
+        dto.setIsFlexible(material.getIsFlexible());
+        dto.setIsTechnical(material.getIsTechnical());
+        dto.setTechnicalTypeLabel(material.getTechnicalTypeLabel());
+        return dto;
+    }
+
+    private AdminFilamentVariantDto toVariantDto(FilamentVariant variant) {
+        AdminFilamentVariantDto dto = new AdminFilamentVariantDto();
+        dto.setId(variant.getId());
+
+        FilamentMaterialType material = variant.getFilamentMaterialType();
+        if (material != null) {
+            dto.setMaterialTypeId(material.getId());
+            dto.setMaterialCode(material.getMaterialCode());
+            dto.setMaterialIsFlexible(material.getIsFlexible());
+            dto.setMaterialIsTechnical(material.getIsTechnical());
+            dto.setMaterialTechnicalTypeLabel(material.getTechnicalTypeLabel());
+        }
+
+        dto.setVariantDisplayName(variant.getVariantDisplayName());
+        dto.setColorName(variant.getColorName());
+        dto.setColorHex(variant.getColorHex());
+        dto.setFinishType(variant.getFinishType());
+        dto.setBrand(variant.getBrand());
+        dto.setIsMatte(variant.getIsMatte());
+        dto.setIsSpecial(variant.getIsSpecial());
+        dto.setCostChfPerKg(variant.getCostChfPerKg());
+        dto.setStockSpools(variant.getStockSpools());
+        dto.setSpoolNetKg(variant.getSpoolNetKg());
+        BigDecimal stockKg = BigDecimal.ZERO;
+        if (variant.getStockSpools() != null && variant.getSpoolNetKg() != null) {
+            stockKg = variant.getStockSpools().multiply(variant.getSpoolNetKg());
+        }
+        dto.setStockKg(stockKg);
+        dto.setStockFilamentGrams(stockKg.multiply(BigDecimal.valueOf(1000)));
+        dto.setIsActive(variant.getIsActive());
+        dto.setCreatedAt(variant.getCreatedAt());
+        return dto;
+    }
+}

backend/src/main/java/com/printcalculator/controller/admin/AdminOperationsController.java

@@ -0,0 +1,372 @@
+package com.printcalculator.controller.admin;
+
+import com.printcalculator.dto.AdminContactRequestDto;
+import com.printcalculator.dto.AdminContactRequestAttachmentDto;
+import com.printcalculator.dto.AdminContactRequestDetailDto;
+import com.printcalculator.dto.AdminFilamentStockDto;
+import com.printcalculator.dto.AdminQuoteSessionDto;
+import com.printcalculator.dto.AdminUpdateContactRequestStatusRequest;
+import com.printcalculator.entity.CustomQuoteRequest;
+import com.printcalculator.entity.CustomQuoteRequestAttachment;
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.entity.FilamentVariantStockKg;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.repository.CustomQuoteRequestAttachmentRepository;
+import com.printcalculator.repository.CustomQuoteRequestRepository;
+import com.printcalculator.repository.FilamentVariantRepository;
+import com.printcalculator.repository.FilamentVariantStockKgRepository;
+import com.printcalculator.repository.OrderRepository;
+import com.printcalculator.repository.QuoteSessionRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+import org.springframework.data.domain.Sort;
+import org.springframework.http.ContentDisposition;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.math.BigDecimal;
+import java.net.MalformedURLException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static org.springframework.http.HttpStatus.BAD_REQUEST;
+import static org.springframework.http.HttpStatus.CONFLICT;
+import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR;
+import static org.springframework.http.HttpStatus.NOT_FOUND;
+
+@RestController
+@RequestMapping("/api/admin")
+@Transactional(readOnly = true)
+public class AdminOperationsController {
+    private static final Logger logger = LoggerFactory.getLogger(AdminOperationsController.class);
+    private static final Path CONTACT_ATTACHMENTS_ROOT = Paths.get("storage_requests").toAbsolutePath().normalize();
+    private static final Set<String> CONTACT_REQUEST_ALLOWED_STATUSES = Set.of(
+            "NEW", "PENDING", "IN_PROGRESS", "DONE", "CLOSED"
+    );
+
+    private final FilamentVariantStockKgRepository filamentStockRepo;
+    private final FilamentVariantRepository filamentVariantRepo;
+    private final CustomQuoteRequestRepository customQuoteRequestRepo;
+    private final CustomQuoteRequestAttachmentRepository customQuoteRequestAttachmentRepo;
+    private final QuoteSessionRepository quoteSessionRepo;
+    private final OrderRepository orderRepo;
+
+    public AdminOperationsController(
+            FilamentVariantStockKgRepository filamentStockRepo,
+            FilamentVariantRepository filamentVariantRepo,
+            CustomQuoteRequestRepository customQuoteRequestRepo,
+            CustomQuoteRequestAttachmentRepository customQuoteRequestAttachmentRepo,
+            QuoteSessionRepository quoteSessionRepo,
+            OrderRepository orderRepo
+    ) {
+        this.filamentStockRepo = filamentStockRepo;
+        this.filamentVariantRepo = filamentVariantRepo;
+        this.customQuoteRequestRepo = customQuoteRequestRepo;
+        this.customQuoteRequestAttachmentRepo = customQuoteRequestAttachmentRepo;
+        this.quoteSessionRepo = quoteSessionRepo;
+        this.orderRepo = orderRepo;
+    }
+
+    @GetMapping("/filament-stock")
+    public ResponseEntity<List<AdminFilamentStockDto>> getFilamentStock() {
+        List<FilamentVariantStockKg> stocks = filamentStockRepo.findAll(Sort.by(Sort.Direction.ASC, "stockKg"));
+        Set<Long> variantIds = stocks.stream()
+                .map(FilamentVariantStockKg::getFilamentVariantId)
+                .collect(Collectors.toSet());
+
+        Map<Long, FilamentVariant> variantsById;
+        if (variantIds.isEmpty()) {
+            variantsById = Collections.emptyMap();
+        } else {
+            variantsById = filamentVariantRepo.findAllById(variantIds).stream()
+                    .collect(Collectors.toMap(FilamentVariant::getId, variant -> variant));
+        }
+
+        List<AdminFilamentStockDto> response = stocks.stream().map(stock -> {
+            FilamentVariant variant = variantsById.get(stock.getFilamentVariantId());
+            AdminFilamentStockDto dto = new AdminFilamentStockDto();
+            dto.setFilamentVariantId(stock.getFilamentVariantId());
+            dto.setStockSpools(stock.getStockSpools());
+            dto.setSpoolNetKg(stock.getSpoolNetKg());
+            dto.setStockKg(stock.getStockKg());
+            BigDecimal grams = stock.getStockKg() != null
+                    ? stock.getStockKg().multiply(BigDecimal.valueOf(1000))
+                    : BigDecimal.ZERO;
+            dto.setStockFilamentGrams(grams);
+
+            if (variant != null) {
+                dto.setMaterialCode(
+                        variant.getFilamentMaterialType() != null
+                                ? variant.getFilamentMaterialType().getMaterialCode()
+                                : "UNKNOWN"
+                );
+                dto.setVariantDisplayName(variant.getVariantDisplayName());
+                dto.setColorName(variant.getColorName());
+                dto.setActive(variant.getIsActive());
+            } else {
+                dto.setMaterialCode("UNKNOWN");
+                dto.setVariantDisplayName("Variant " + stock.getFilamentVariantId());
+                dto.setColorName("-");
+                dto.setActive(false);
+            }
+
+            return dto;
+        }).toList();
+
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/contact-requests")
+    public ResponseEntity<List<AdminContactRequestDto>> getContactRequests() {
+        List<AdminContactRequestDto> response = customQuoteRequestRepo.findAll(
+                        Sort.by(Sort.Direction.DESC, "createdAt")
+                )
+                .stream()
+                .map(this::toContactRequestDto)
+                .toList();
+
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/contact-requests/{requestId}")
+    public ResponseEntity<AdminContactRequestDetailDto> getContactRequestDetail(@PathVariable UUID requestId) {
+        CustomQuoteRequest request = customQuoteRequestRepo.findById(requestId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Contact request not found"));
+
+        List<AdminContactRequestAttachmentDto> attachments = customQuoteRequestAttachmentRepo
+                .findByRequest_IdOrderByCreatedAtAsc(requestId)
+                .stream()
+                .map(this::toContactRequestAttachmentDto)
+                .toList();
+
+        return ResponseEntity.ok(toContactRequestDetailDto(request, attachments));
+    }
+
+    @PatchMapping("/contact-requests/{requestId}/status")
+    @Transactional
+    public ResponseEntity<AdminContactRequestDetailDto> updateContactRequestStatus(
+            @PathVariable UUID requestId,
+            @RequestBody AdminUpdateContactRequestStatusRequest payload
+    ) {
+        CustomQuoteRequest request = customQuoteRequestRepo.findById(requestId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Contact request not found"));
+
+        String requestedStatus = payload != null && payload.getStatus() != null
+                ? payload.getStatus().trim().toUpperCase(Locale.ROOT)
+                : "";
+
+        if (!CONTACT_REQUEST_ALLOWED_STATUSES.contains(requestedStatus)) {
+            throw new ResponseStatusException(
+                    BAD_REQUEST,
+                    "Invalid status. Allowed: " + String.join(", ", CONTACT_REQUEST_ALLOWED_STATUSES)
+            );
+        }
+
+        request.setStatus(requestedStatus);
+        request.setUpdatedAt(OffsetDateTime.now());
+        CustomQuoteRequest saved = customQuoteRequestRepo.save(request);
+
+        List<AdminContactRequestAttachmentDto> attachments = customQuoteRequestAttachmentRepo
+                .findByRequest_IdOrderByCreatedAtAsc(requestId)
+                .stream()
+                .map(this::toContactRequestAttachmentDto)
+                .toList();
+
+        return ResponseEntity.ok(toContactRequestDetailDto(saved, attachments));
+    }
+
+    @GetMapping("/contact-requests/{requestId}/attachments/{attachmentId}/file")
+    public ResponseEntity<Resource> downloadContactRequestAttachment(
+            @PathVariable UUID requestId,
+            @PathVariable UUID attachmentId
+    ) {
+        CustomQuoteRequestAttachment attachment = customQuoteRequestAttachmentRepo.findById(attachmentId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Attachment not found"));
+
+        if (!attachment.getRequest().getId().equals(requestId)) {
+            throw new ResponseStatusException(NOT_FOUND, "Attachment not found for request");
+        }
+
+        String relativePath = attachment.getStoredRelativePath();
+        if (relativePath == null || relativePath.isBlank() || "PENDING".equals(relativePath)) {
+            throw new ResponseStatusException(NOT_FOUND, "Attachment file not available");
+        }
+
+        String expectedPrefix = "quote-requests/" + requestId + "/attachments/" + attachmentId + "/";
+        if (!relativePath.startsWith(expectedPrefix)) {
+            throw new ResponseStatusException(NOT_FOUND, "Attachment file not available");
+        }
+
+        Path filePath = CONTACT_ATTACHMENTS_ROOT.resolve(relativePath).normalize();
+        if (!filePath.startsWith(CONTACT_ATTACHMENTS_ROOT)) {
+            throw new ResponseStatusException(NOT_FOUND, "Attachment file not available");
+        }
+
+        if (!Files.exists(filePath)) {
+            throw new ResponseStatusException(NOT_FOUND, "Attachment file not available");
+        }
+
+        try {
+            Resource resource = new UrlResource(filePath.toUri());
+            if (!resource.exists() || !resource.isReadable()) {
+                throw new ResponseStatusException(NOT_FOUND, "Attachment file not available");
+            }
+
+            MediaType mediaType = MediaType.APPLICATION_OCTET_STREAM;
+            String mimeType = attachment.getMimeType();
+            if (mimeType != null && !mimeType.isBlank()) {
+                try {
+                    mediaType = MediaType.parseMediaType(mimeType);
+                } catch (Exception ignored) {
+                    mediaType = MediaType.APPLICATION_OCTET_STREAM;
+                }
+            }
+
+            String filename = attachment.getOriginalFilename();
+            if (filename == null || filename.isBlank()) {
+                filename = attachment.getStoredFilename() != null && !attachment.getStoredFilename().isBlank()
+                        ? attachment.getStoredFilename()
+                        : "attachment-" + attachmentId;
+            }
+
+            return ResponseEntity.ok()
+                    .contentType(mediaType)
+                    .header(HttpHeaders.CONTENT_DISPOSITION, ContentDisposition.attachment()
+                            .filename(filename, StandardCharsets.UTF_8)
+                            .build()
+                            .toString())
+                    .body(resource);
+        } catch (MalformedURLException e) {
+            throw new ResponseStatusException(NOT_FOUND, "Attachment file not available");
+        }
+    }
+
+    @GetMapping("/sessions")
+    public ResponseEntity<List<AdminQuoteSessionDto>> getQuoteSessions() {
+        List<AdminQuoteSessionDto> response = quoteSessionRepo.findAll(
+                        Sort.by(Sort.Direction.DESC, "createdAt")
+                )
+                .stream()
+                .map(this::toQuoteSessionDto)
+                .toList();
+
+        return ResponseEntity.ok(response);
+    }
+
+    @DeleteMapping("/sessions/{sessionId}")
+    @Transactional
+    public ResponseEntity<Void> deleteQuoteSession(@PathVariable UUID sessionId) {
+        QuoteSession session = quoteSessionRepo.findById(sessionId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Session not found"));
+
+        if (orderRepo.existsBySourceQuoteSession_Id(sessionId)) {
+            throw new ResponseStatusException(CONFLICT, "Cannot delete session already linked to an order");
+        }
+
+        deleteSessionFiles(sessionId);
+        quoteSessionRepo.delete(session);
+        return ResponseEntity.noContent().build();
+    }
+
+    private AdminContactRequestDto toContactRequestDto(CustomQuoteRequest request) {
+        AdminContactRequestDto dto = new AdminContactRequestDto();
+        dto.setId(request.getId());
+        dto.setRequestType(request.getRequestType());
+        dto.setCustomerType(request.getCustomerType());
+        dto.setEmail(request.getEmail());
+        dto.setPhone(request.getPhone());
+        dto.setName(request.getName());
+        dto.setCompanyName(request.getCompanyName());
+        dto.setStatus(request.getStatus());
+        dto.setCreatedAt(request.getCreatedAt());
+        return dto;
+    }
+
+    private AdminContactRequestAttachmentDto toContactRequestAttachmentDto(CustomQuoteRequestAttachment attachment) {
+        AdminContactRequestAttachmentDto dto = new AdminContactRequestAttachmentDto();
+        dto.setId(attachment.getId());
+        dto.setOriginalFilename(attachment.getOriginalFilename());
+        dto.setMimeType(attachment.getMimeType());
+        dto.setFileSizeBytes(attachment.getFileSizeBytes());
+        dto.setCreatedAt(attachment.getCreatedAt());
+        return dto;
+    }
+
+    private AdminContactRequestDetailDto toContactRequestDetailDto(
+            CustomQuoteRequest request,
+            List<AdminContactRequestAttachmentDto> attachments
+    ) {
+        AdminContactRequestDetailDto dto = new AdminContactRequestDetailDto();
+        dto.setId(request.getId());
+        dto.setRequestType(request.getRequestType());
+        dto.setCustomerType(request.getCustomerType());
+        dto.setEmail(request.getEmail());
+        dto.setPhone(request.getPhone());
+        dto.setName(request.getName());
+        dto.setCompanyName(request.getCompanyName());
+        dto.setContactPerson(request.getContactPerson());
+        dto.setMessage(request.getMessage());
+        dto.setStatus(request.getStatus());
+        dto.setCreatedAt(request.getCreatedAt());
+        dto.setUpdatedAt(request.getUpdatedAt());
+        dto.setAttachments(attachments);
+        return dto;
+    }
+
+    private AdminQuoteSessionDto toQuoteSessionDto(QuoteSession session) {
+        AdminQuoteSessionDto dto = new AdminQuoteSessionDto();
+        dto.setId(session.getId());
+        dto.setStatus(session.getStatus());
+        dto.setMaterialCode(session.getMaterialCode());
+        dto.setCreatedAt(session.getCreatedAt());
+        dto.setExpiresAt(session.getExpiresAt());
+        dto.setConvertedOrderId(session.getConvertedOrderId());
+        return dto;
+    }
+
+    private void deleteSessionFiles(UUID sessionId) {
+        Path sessionDir = Paths.get("storage_quotes", sessionId.toString());
+        if (!Files.exists(sessionDir)) {
+            return;
+        }
+
+        try (Stream<Path> walk = Files.walk(sessionDir)) {
+            walk.sorted(Comparator.reverseOrder()).forEach(path -> {
+                try {
+                    Files.deleteIfExists(path);
+                } catch (IOException e) {
+                    throw new UncheckedIOException(e);
+                }
+            });
+        } catch (IOException | UncheckedIOException e) {
+            logger.error("Failed to delete files for session {}", sessionId, e);
+            throw new ResponseStatusException(INTERNAL_SERVER_ERROR, "Unable to delete session files");
+        }
+    }
+}

backend/src/main/java/com/printcalculator/controller/admin/AdminOrderController.java

@@ -0,0 +1,327 @@
+package com.printcalculator.controller.admin;
+
+import com.printcalculator.dto.AddressDto;
+import com.printcalculator.dto.AdminOrderStatusUpdateRequest;
+import com.printcalculator.dto.OrderDto;
+import com.printcalculator.dto.OrderItemDto;
+import com.printcalculator.entity.Order;
+import com.printcalculator.entity.OrderItem;
+import com.printcalculator.entity.Payment;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.repository.OrderItemRepository;
+import com.printcalculator.repository.OrderRepository;
+import com.printcalculator.repository.PaymentRepository;
+import com.printcalculator.service.InvoicePdfRenderingService;
+import com.printcalculator.service.PaymentService;
+import com.printcalculator.service.QrBillService;
+import com.printcalculator.service.StorageService;
+import org.springframework.core.io.Resource;
+import org.springframework.http.ContentDisposition;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.UUID;
+
+import static org.springframework.http.HttpStatus.BAD_REQUEST;
+import static org.springframework.http.HttpStatus.NOT_FOUND;
+
+@RestController
+@RequestMapping("/api/admin/orders")
+@Transactional(readOnly = true)
+public class AdminOrderController {
+    private static final List<String> ALLOWED_ORDER_STATUSES = List.of(
+            "PENDING_PAYMENT",
+            "PAID",
+            "IN_PRODUCTION",
+            "SHIPPED",
+            "COMPLETED",
+            "CANCELLED"
+    );
+
+    private final OrderRepository orderRepo;
+    private final OrderItemRepository orderItemRepo;
+    private final PaymentRepository paymentRepo;
+    private final PaymentService paymentService;
+    private final StorageService storageService;
+    private final InvoicePdfRenderingService invoiceService;
+    private final QrBillService qrBillService;
+
+    public AdminOrderController(
+            OrderRepository orderRepo,
+            OrderItemRepository orderItemRepo,
+            PaymentRepository paymentRepo,
+            PaymentService paymentService,
+            StorageService storageService,
+            InvoicePdfRenderingService invoiceService,
+            QrBillService qrBillService
+    ) {
+        this.orderRepo = orderRepo;
+        this.orderItemRepo = orderItemRepo;
+        this.paymentRepo = paymentRepo;
+        this.paymentService = paymentService;
+        this.storageService = storageService;
+        this.invoiceService = invoiceService;
+        this.qrBillService = qrBillService;
+    }
+
+    @GetMapping
+    public ResponseEntity<List<OrderDto>> listOrders() {
+        List<OrderDto> response = orderRepo.findAllByOrderByCreatedAtDesc()
+                .stream()
+                .map(this::toOrderDto)
+                .toList();
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/{orderId}")
+    public ResponseEntity<OrderDto> getOrder(@PathVariable UUID orderId) {
+        return ResponseEntity.ok(toOrderDto(getOrderOrThrow(orderId)));
+    }
+
+    @PostMapping("/{orderId}/payments/confirm")
+    @Transactional
+    public ResponseEntity<OrderDto> confirmPayment(
+            @PathVariable UUID orderId,
+            @RequestBody(required = false) Map<String, String> payload
+    ) {
+        getOrderOrThrow(orderId);
+        String method = payload != null ? payload.get("method") : null;
+        paymentService.confirmPayment(orderId, method);
+        return ResponseEntity.ok(toOrderDto(getOrderOrThrow(orderId)));
+    }
+
+    @PostMapping("/{orderId}/status")
+    @Transactional
+    public ResponseEntity<OrderDto> updateOrderStatus(
+            @PathVariable UUID orderId,
+            @RequestBody AdminOrderStatusUpdateRequest payload
+    ) {
+        if (payload == null || payload.getStatus() == null || payload.getStatus().isBlank()) {
+            throw new ResponseStatusException(org.springframework.http.HttpStatus.BAD_REQUEST, "Status is required");
+        }
+
+        Order order = getOrderOrThrow(orderId);
+        String normalizedStatus = payload.getStatus().trim().toUpperCase(Locale.ROOT);
+        if (!ALLOWED_ORDER_STATUSES.contains(normalizedStatus)) {
+            throw new ResponseStatusException(
+                    BAD_REQUEST,
+                    "Invalid order status. Allowed values: " + String.join(", ", ALLOWED_ORDER_STATUSES)
+            );
+        }
+        order.setStatus(normalizedStatus);
+        orderRepo.save(order);
+
+        return ResponseEntity.ok(toOrderDto(order));
+    }
+
+    @GetMapping("/{orderId}/items/{orderItemId}/file")
+    public ResponseEntity<Resource> downloadOrderItemFile(
+            @PathVariable UUID orderId,
+            @PathVariable UUID orderItemId
+    ) {
+        OrderItem item = orderItemRepo.findById(orderItemId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Order item not found"));
+
+        if (!item.getOrder().getId().equals(orderId)) {
+            throw new ResponseStatusException(NOT_FOUND, "Order item not found for order");
+        }
+
+        String relativePath = item.getStoredRelativePath();
+        if (relativePath == null || relativePath.isBlank() || "PENDING".equals(relativePath)) {
+            throw new ResponseStatusException(NOT_FOUND, "File not available");
+        }
+        Path safeRelativePath = resolveOrderItemRelativePath(relativePath, orderId, orderItemId);
+        if (safeRelativePath == null) {
+            throw new ResponseStatusException(NOT_FOUND, "File not available");
+        }
+
+        try {
+            Resource resource = storageService.loadAsResource(safeRelativePath);
+            MediaType contentType = MediaType.APPLICATION_OCTET_STREAM;
+            if (item.getMimeType() != null && !item.getMimeType().isBlank()) {
+                try {
+                    contentType = MediaType.parseMediaType(item.getMimeType());
+                } catch (Exception ignored) {
+                    contentType = MediaType.APPLICATION_OCTET_STREAM;
+                }
+            }
+
+            String filename = item.getOriginalFilename() != null && !item.getOriginalFilename().isBlank()
+                    ? item.getOriginalFilename()
+                    : "order-item-" + orderItemId;
+
+            return ResponseEntity.ok()
+                    .contentType(contentType)
+                    .header(HttpHeaders.CONTENT_DISPOSITION, ContentDisposition.attachment()
+                            .filename(filename, StandardCharsets.UTF_8)
+                            .build()
+                            .toString())
+                    .body(resource);
+        } catch (Exception e) {
+            throw new ResponseStatusException(NOT_FOUND, "File not available");
+        }
+    }
+
+    @GetMapping("/{orderId}/documents/confirmation")
+    public ResponseEntity<byte[]> downloadOrderConfirmation(@PathVariable UUID orderId) {
+        return generateDocument(getOrderOrThrow(orderId), true);
+    }
+
+    @GetMapping("/{orderId}/documents/invoice")
+    public ResponseEntity<byte[]> downloadOrderInvoice(@PathVariable UUID orderId) {
+        return generateDocument(getOrderOrThrow(orderId), false);
+    }
+
+    private Order getOrderOrThrow(UUID orderId) {
+        return orderRepo.findById(orderId)
+                .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Order not found"));
+    }
+
+    private OrderDto toOrderDto(Order order) {
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(order.getId());
+        OrderDto dto = new OrderDto();
+        dto.setId(order.getId());
+        dto.setOrderNumber(getDisplayOrderNumber(order));
+        dto.setStatus(order.getStatus());
+
+        paymentRepo.findByOrder_Id(order.getId()).ifPresent(p -> {
+            dto.setPaymentStatus(p.getStatus());
+            dto.setPaymentMethod(p.getMethod());
+        });
+
+        dto.setCustomerEmail(order.getCustomerEmail());
+        dto.setCustomerPhone(order.getCustomerPhone());
+        dto.setPreferredLanguage(order.getPreferredLanguage());
+        dto.setBillingCustomerType(order.getBillingCustomerType());
+        dto.setCurrency(order.getCurrency());
+        dto.setSetupCostChf(order.getSetupCostChf());
+        dto.setShippingCostChf(order.getShippingCostChf());
+        dto.setDiscountChf(order.getDiscountChf());
+        dto.setSubtotalChf(order.getSubtotalChf());
+        dto.setTotalChf(order.getTotalChf());
+        dto.setCreatedAt(order.getCreatedAt());
+        dto.setShippingSameAsBilling(order.getShippingSameAsBilling());
+        QuoteSession sourceSession = order.getSourceQuoteSession();
+        if (sourceSession != null) {
+            dto.setPrintMaterialCode(sourceSession.getMaterialCode());
+            dto.setPrintNozzleDiameterMm(sourceSession.getNozzleDiameterMm());
+            dto.setPrintLayerHeightMm(sourceSession.getLayerHeightMm());
+            dto.setPrintInfillPattern(sourceSession.getInfillPattern());
+            dto.setPrintInfillPercent(sourceSession.getInfillPercent());
+            dto.setPrintSupportsEnabled(sourceSession.getSupportsEnabled());
+        }
+
+        AddressDto billing = new AddressDto();
+        billing.setFirstName(order.getBillingFirstName());
+        billing.setLastName(order.getBillingLastName());
+        billing.setCompanyName(order.getBillingCompanyName());
+        billing.setContactPerson(order.getBillingContactPerson());
+        billing.setAddressLine1(order.getBillingAddressLine1());
+        billing.setAddressLine2(order.getBillingAddressLine2());
+        billing.setZip(order.getBillingZip());
+        billing.setCity(order.getBillingCity());
+        billing.setCountryCode(order.getBillingCountryCode());
+        dto.setBillingAddress(billing);
+
+        if (!Boolean.TRUE.equals(order.getShippingSameAsBilling())) {
+            AddressDto shipping = new AddressDto();
+            shipping.setFirstName(order.getShippingFirstName());
+            shipping.setLastName(order.getShippingLastName());
+            shipping.setCompanyName(order.getShippingCompanyName());
+            shipping.setContactPerson(order.getShippingContactPerson());
+            shipping.setAddressLine1(order.getShippingAddressLine1());
+            shipping.setAddressLine2(order.getShippingAddressLine2());
+            shipping.setZip(order.getShippingZip());
+            shipping.setCity(order.getShippingCity());
+            shipping.setCountryCode(order.getShippingCountryCode());
+            dto.setShippingAddress(shipping);
+        }
+
+        List<OrderItemDto> itemDtos = items.stream().map(i -> {
+            OrderItemDto idto = new OrderItemDto();
+            idto.setId(i.getId());
+            idto.setOriginalFilename(i.getOriginalFilename());
+            idto.setMaterialCode(i.getMaterialCode());
+            idto.setColorCode(i.getColorCode());
+            idto.setQuantity(i.getQuantity());
+            idto.setPrintTimeSeconds(i.getPrintTimeSeconds());
+            idto.setMaterialGrams(i.getMaterialGrams());
+            idto.setUnitPriceChf(i.getUnitPriceChf());
+            idto.setLineTotalChf(i.getLineTotalChf());
+            return idto;
+        }).toList();
+        dto.setItems(itemDtos);
+
+        return dto;
+    }
+
+    private String getDisplayOrderNumber(Order order) {
+        String orderNumber = order.getOrderNumber();
+        if (orderNumber != null && !orderNumber.isBlank()) {
+            return orderNumber;
+        }
+        return order.getId() != null ? order.getId().toString() : "unknown";
+    }
+
+    private ResponseEntity<byte[]> generateDocument(Order order, boolean isConfirmation) {
+        String displayOrderNumber = getDisplayOrderNumber(order);
+        if (isConfirmation) {
+            Path relativePath = buildConfirmationPdfRelativePath(order.getId(), displayOrderNumber);
+            try {
+                byte[] existingPdf = storageService.loadAsResource(relativePath).getInputStream().readAllBytes();
+                return ResponseEntity.ok()
+                        .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"confirmation-" + displayOrderNumber + ".pdf\"")
+                        .contentType(MediaType.APPLICATION_PDF)
+                        .body(existingPdf);
+            } catch (Exception ignored) {
+                // fallback to generated confirmation document
+            }
+        }
+
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(order.getId());
+        Payment payment = paymentRepo.findByOrder_Id(order.getId()).orElse(null);
+        byte[] pdf = invoiceService.generateDocumentPdf(order, items, isConfirmation, qrBillService, payment);
+
+        String prefix = isConfirmation ? "confirmation-" : "invoice-";
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + prefix + displayOrderNumber + ".pdf\"")
+                .contentType(MediaType.APPLICATION_PDF)
+                .body(pdf);
+    }
+
+    private Path resolveOrderItemRelativePath(String storedRelativePath, UUID orderId, UUID orderItemId) {
+        try {
+            Path candidate = Path.of(storedRelativePath).normalize();
+            if (candidate.isAbsolute()) {
+                return null;
+            }
+            Path expectedPrefix = Path.of("orders", orderId.toString(), "3d-files", orderItemId.toString());
+            if (!candidate.startsWith(expectedPrefix)) {
+                return null;
+            }
+            return candidate;
+        } catch (InvalidPathException e) {
+            return null;
+        }
+    }
+
+    private Path buildConfirmationPdfRelativePath(UUID orderId, String orderNumber) {
+        return Path.of("orders", orderId.toString(), "documents", "confirmation-" + orderNumber + ".pdf");
+    }
+}

backend/src/main/java/com/printcalculator/dto/AddressDto.java

@@ -0,0 +1,16 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+
+@Data
+public class AddressDto {
+    private String firstName;
+    private String lastName;
+    private String companyName;
+    private String contactPerson;
+    private String addressLine1;
+    private String addressLine2;
+    private String zip;
+    private String city;
+    private String countryCode;
+}

backend/src/main/java/com/printcalculator/dto/AdminContactRequestAttachmentDto.java

@@ -0,0 +1,52 @@
+package com.printcalculator.dto;
+
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+public class AdminContactRequestAttachmentDto {
+    private UUID id;
+    private String originalFilename;
+    private String mimeType;
+    private Long fileSizeBytes;
+    private OffsetDateTime createdAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getOriginalFilename() {
+        return originalFilename;
+    }
+
+    public void setOriginalFilename(String originalFilename) {
+        this.originalFilename = originalFilename;
+    }
+
+    public String getMimeType() {
+        return mimeType;
+    }
+
+    public void setMimeType(String mimeType) {
+        this.mimeType = mimeType;
+    }
+
+    public Long getFileSizeBytes() {
+        return fileSizeBytes;
+    }
+
+    public void setFileSizeBytes(Long fileSizeBytes) {
+        this.fileSizeBytes = fileSizeBytes;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminContactRequestDetailDto.java

@@ -0,0 +1,125 @@
+package com.printcalculator.dto;
+
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.UUID;
+
+public class AdminContactRequestDetailDto {
+    private UUID id;
+    private String requestType;
+    private String customerType;
+    private String email;
+    private String phone;
+    private String name;
+    private String companyName;
+    private String contactPerson;
+    private String message;
+    private String status;
+    private OffsetDateTime createdAt;
+    private OffsetDateTime updatedAt;
+    private List<AdminContactRequestAttachmentDto> attachments;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getRequestType() {
+        return requestType;
+    }
+
+    public void setRequestType(String requestType) {
+        this.requestType = requestType;
+    }
+
+    public String getCustomerType() {
+        return customerType;
+    }
+
+    public void setCustomerType(String customerType) {
+        this.customerType = customerType;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCompanyName() {
+        return companyName;
+    }
+
+    public void setCompanyName(String companyName) {
+        this.companyName = companyName;
+    }
+
+    public String getContactPerson() {
+        return contactPerson;
+    }
+
+    public void setContactPerson(String contactPerson) {
+        this.contactPerson = contactPerson;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(OffsetDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
+    public List<AdminContactRequestAttachmentDto> getAttachments() {
+        return attachments;
+    }
+
+    public void setAttachments(List<AdminContactRequestAttachmentDto> attachments) {
+        this.attachments = attachments;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminContactRequestDto.java

@@ -0,0 +1,88 @@
+package com.printcalculator.dto;
+
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+public class AdminContactRequestDto {
+    private UUID id;
+    private String requestType;
+    private String customerType;
+    private String email;
+    private String phone;
+    private String name;
+    private String companyName;
+    private String status;
+    private OffsetDateTime createdAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getRequestType() {
+        return requestType;
+    }
+
+    public void setRequestType(String requestType) {
+        this.requestType = requestType;
+    }
+
+    public String getCustomerType() {
+        return customerType;
+    }
+
+    public void setCustomerType(String customerType) {
+        this.customerType = customerType;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCompanyName() {
+        return companyName;
+    }
+
+    public void setCompanyName(String companyName) {
+        this.companyName = companyName;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminFilamentMaterialTypeDto.java

@@ -0,0 +1,49 @@
+package com.printcalculator.dto;
+
+public class AdminFilamentMaterialTypeDto {
+    private Long id;
+    private String materialCode;
+    private Boolean isFlexible;
+    private Boolean isTechnical;
+    private String technicalTypeLabel;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public Boolean getIsFlexible() {
+        return isFlexible;
+    }
+
+    public void setIsFlexible(Boolean isFlexible) {
+        this.isFlexible = isFlexible;
+    }
+
+    public Boolean getIsTechnical() {
+        return isTechnical;
+    }
+
+    public void setIsTechnical(Boolean isTechnical) {
+        this.isTechnical = isTechnical;
+    }
+
+    public String getTechnicalTypeLabel() {
+        return technicalTypeLabel;
+    }
+
+    public void setTechnicalTypeLabel(String technicalTypeLabel) {
+        this.technicalTypeLabel = technicalTypeLabel;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminFilamentStockDto.java

@@ -0,0 +1,87 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+
+public class AdminFilamentStockDto {
+    private Long filamentVariantId;
+    private String materialCode;
+    private String variantDisplayName;
+    private String colorName;
+    private BigDecimal stockSpools;
+    private BigDecimal spoolNetKg;
+    private BigDecimal stockKg;
+    private BigDecimal stockFilamentGrams;
+    private Boolean active;
+
+    public Long getFilamentVariantId() {
+        return filamentVariantId;
+    }
+
+    public void setFilamentVariantId(Long filamentVariantId) {
+        this.filamentVariantId = filamentVariantId;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public String getVariantDisplayName() {
+        return variantDisplayName;
+    }
+
+    public void setVariantDisplayName(String variantDisplayName) {
+        this.variantDisplayName = variantDisplayName;
+    }
+
+    public String getColorName() {
+        return colorName;
+    }
+
+    public void setColorName(String colorName) {
+        this.colorName = colorName;
+    }
+
+    public BigDecimal getStockSpools() {
+        return stockSpools;
+    }
+
+    public void setStockSpools(BigDecimal stockSpools) {
+        this.stockSpools = stockSpools;
+    }
+
+    public BigDecimal getSpoolNetKg() {
+        return spoolNetKg;
+    }
+
+    public void setSpoolNetKg(BigDecimal spoolNetKg) {
+        this.spoolNetKg = spoolNetKg;
+    }
+
+    public BigDecimal getStockKg() {
+        return stockKg;
+    }
+
+    public void setStockKg(BigDecimal stockKg) {
+        this.stockKg = stockKg;
+    }
+
+    public BigDecimal getStockFilamentGrams() {
+        return stockFilamentGrams;
+    }
+
+    public void setStockFilamentGrams(BigDecimal stockFilamentGrams) {
+        this.stockFilamentGrams = stockFilamentGrams;
+    }
+
+    public Boolean getActive() {
+        return active;
+    }
+
+    public void setActive(Boolean active) {
+        this.active = active;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminFilamentVariantDto.java

@@ -0,0 +1,187 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+
+public class AdminFilamentVariantDto {
+    private Long id;
+    private Long materialTypeId;
+    private String materialCode;
+    private Boolean materialIsFlexible;
+    private Boolean materialIsTechnical;
+    private String materialTechnicalTypeLabel;
+    private String variantDisplayName;
+    private String colorName;
+    private String colorHex;
+    private String finishType;
+    private String brand;
+    private Boolean isMatte;
+    private Boolean isSpecial;
+    private BigDecimal costChfPerKg;
+    private BigDecimal stockSpools;
+    private BigDecimal spoolNetKg;
+    private BigDecimal stockKg;
+    private BigDecimal stockFilamentGrams;
+    private Boolean isActive;
+    private OffsetDateTime createdAt;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public Long getMaterialTypeId() {
+        return materialTypeId;
+    }
+
+    public void setMaterialTypeId(Long materialTypeId) {
+        this.materialTypeId = materialTypeId;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public Boolean getMaterialIsFlexible() {
+        return materialIsFlexible;
+    }
+
+    public void setMaterialIsFlexible(Boolean materialIsFlexible) {
+        this.materialIsFlexible = materialIsFlexible;
+    }
+
+    public Boolean getMaterialIsTechnical() {
+        return materialIsTechnical;
+    }
+
+    public void setMaterialIsTechnical(Boolean materialIsTechnical) {
+        this.materialIsTechnical = materialIsTechnical;
+    }
+
+    public String getMaterialTechnicalTypeLabel() {
+        return materialTechnicalTypeLabel;
+    }
+
+    public void setMaterialTechnicalTypeLabel(String materialTechnicalTypeLabel) {
+        this.materialTechnicalTypeLabel = materialTechnicalTypeLabel;
+    }
+
+    public String getVariantDisplayName() {
+        return variantDisplayName;
+    }
+
+    public void setVariantDisplayName(String variantDisplayName) {
+        this.variantDisplayName = variantDisplayName;
+    }
+
+    public String getColorName() {
+        return colorName;
+    }
+
+    public void setColorName(String colorName) {
+        this.colorName = colorName;
+    }
+
+    public String getColorHex() {
+        return colorHex;
+    }
+
+    public void setColorHex(String colorHex) {
+        this.colorHex = colorHex;
+    }
+
+    public String getFinishType() {
+        return finishType;
+    }
+
+    public void setFinishType(String finishType) {
+        this.finishType = finishType;
+    }
+
+    public String getBrand() {
+        return brand;
+    }
+
+    public void setBrand(String brand) {
+        this.brand = brand;
+    }
+
+    public Boolean getIsMatte() {
+        return isMatte;
+    }
+
+    public void setIsMatte(Boolean isMatte) {
+        this.isMatte = isMatte;
+    }
+
+    public Boolean getIsSpecial() {
+        return isSpecial;
+    }
+
+    public void setIsSpecial(Boolean isSpecial) {
+        this.isSpecial = isSpecial;
+    }
+
+    public BigDecimal getCostChfPerKg() {
+        return costChfPerKg;
+    }
+
+    public void setCostChfPerKg(BigDecimal costChfPerKg) {
+        this.costChfPerKg = costChfPerKg;
+    }
+
+    public BigDecimal getStockSpools() {
+        return stockSpools;
+    }
+
+    public void setStockSpools(BigDecimal stockSpools) {
+        this.stockSpools = stockSpools;
+    }
+
+    public BigDecimal getSpoolNetKg() {
+        return spoolNetKg;
+    }
+
+    public void setSpoolNetKg(BigDecimal spoolNetKg) {
+        this.spoolNetKg = spoolNetKg;
+    }
+
+    public BigDecimal getStockKg() {
+        return stockKg;
+    }
+
+    public void setStockKg(BigDecimal stockKg) {
+        this.stockKg = stockKg;
+    }
+
+    public BigDecimal getStockFilamentGrams() {
+        return stockFilamentGrams;
+    }
+
+    public void setStockFilamentGrams(BigDecimal stockFilamentGrams) {
+        this.stockFilamentGrams = stockFilamentGrams;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminLoginRequest.java

@@ -0,0 +1,17 @@
+package com.printcalculator.dto;
+
+import jakarta.validation.constraints.NotBlank;
+
+public class AdminLoginRequest {
+
+    @NotBlank
+    private String password;
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminOrderStatusUpdateRequest.java

@@ -0,0 +1,13 @@
+package com.printcalculator.dto;
+
+public class AdminOrderStatusUpdateRequest {
+    private String status;
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminQuoteSessionDto.java

@@ -0,0 +1,61 @@
+package com.printcalculator.dto;
+
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+public class AdminQuoteSessionDto {
+    private UUID id;
+    private String status;
+    private String materialCode;
+    private OffsetDateTime createdAt;
+    private OffsetDateTime expiresAt;
+    private UUID convertedOrderId;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getExpiresAt() {
+        return expiresAt;
+    }
+
+    public void setExpiresAt(OffsetDateTime expiresAt) {
+        this.expiresAt = expiresAt;
+    }
+
+    public UUID getConvertedOrderId() {
+        return convertedOrderId;
+    }
+
+    public void setConvertedOrderId(UUID convertedOrderId) {
+        this.convertedOrderId = convertedOrderId;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminUpdateContactRequestStatusRequest.java

@@ -0,0 +1,13 @@
+package com.printcalculator.dto;
+
+public class AdminUpdateContactRequestStatusRequest {
+    private String status;
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminUpsertFilamentMaterialTypeRequest.java

@@ -0,0 +1,40 @@
+package com.printcalculator.dto;
+
+public class AdminUpsertFilamentMaterialTypeRequest {
+    private String materialCode;
+    private Boolean isFlexible;
+    private Boolean isTechnical;
+    private String technicalTypeLabel;
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public Boolean getIsFlexible() {
+        return isFlexible;
+    }
+
+    public void setIsFlexible(Boolean isFlexible) {
+        this.isFlexible = isFlexible;
+    }
+
+    public Boolean getIsTechnical() {
+        return isTechnical;
+    }
+
+    public void setIsTechnical(Boolean isTechnical) {
+        this.isTechnical = isTechnical;
+    }
+
+    public String getTechnicalTypeLabel() {
+        return technicalTypeLabel;
+    }
+
+    public void setTechnicalTypeLabel(String technicalTypeLabel) {
+        this.technicalTypeLabel = technicalTypeLabel;
+    }
+}

backend/src/main/java/com/printcalculator/dto/AdminUpsertFilamentVariantRequest.java

@@ -0,0 +1,114 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+
+public class AdminUpsertFilamentVariantRequest {
+    private Long materialTypeId;
+    private String variantDisplayName;
+    private String colorName;
+    private String colorHex;
+    private String finishType;
+    private String brand;
+    private Boolean isMatte;
+    private Boolean isSpecial;
+    private BigDecimal costChfPerKg;
+    private BigDecimal stockSpools;
+    private BigDecimal spoolNetKg;
+    private Boolean isActive;
+
+    public Long getMaterialTypeId() {
+        return materialTypeId;
+    }
+
+    public void setMaterialTypeId(Long materialTypeId) {
+        this.materialTypeId = materialTypeId;
+    }
+
+    public String getVariantDisplayName() {
+        return variantDisplayName;
+    }
+
+    public void setVariantDisplayName(String variantDisplayName) {
+        this.variantDisplayName = variantDisplayName;
+    }
+
+    public String getColorName() {
+        return colorName;
+    }
+
+    public void setColorName(String colorName) {
+        this.colorName = colorName;
+    }
+
+    public String getColorHex() {
+        return colorHex;
+    }
+
+    public void setColorHex(String colorHex) {
+        this.colorHex = colorHex;
+    }
+
+    public String getFinishType() {
+        return finishType;
+    }
+
+    public void setFinishType(String finishType) {
+        this.finishType = finishType;
+    }
+
+    public String getBrand() {
+        return brand;
+    }
+
+    public void setBrand(String brand) {
+        this.brand = brand;
+    }
+
+    public Boolean getIsMatte() {
+        return isMatte;
+    }
+
+    public void setIsMatte(Boolean isMatte) {
+        this.isMatte = isMatte;
+    }
+
+    public Boolean getIsSpecial() {
+        return isSpecial;
+    }
+
+    public void setIsSpecial(Boolean isSpecial) {
+        this.isSpecial = isSpecial;
+    }
+
+    public BigDecimal getCostChfPerKg() {
+        return costChfPerKg;
+    }
+
+    public void setCostChfPerKg(BigDecimal costChfPerKg) {
+        this.costChfPerKg = costChfPerKg;
+    }
+
+    public BigDecimal getStockSpools() {
+        return stockSpools;
+    }
+
+    public void setStockSpools(BigDecimal stockSpools) {
+        this.stockSpools = stockSpools;
+    }
+
+    public BigDecimal getSpoolNetKg() {
+        return spoolNetKg;
+    }
+
+    public void setSpoolNetKg(BigDecimal spoolNetKg) {
+        this.spoolNetKg = spoolNetKg;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+}

backend/src/main/java/com/printcalculator/dto/CreateOrderRequest.java

@@ -0,0 +1,19 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+import jakarta.validation.constraints.AssertTrue;
+
+@Data
+public class CreateOrderRequest {
+    private CustomerDto customer;
+    private AddressDto billingAddress;
+    private AddressDto shippingAddress;
+    private String language;
+    private boolean shippingSameAsBilling;
+
+    @AssertTrue(message = "L'accettazione dei Termini e Condizioni e obbligatoria.")
+    private boolean acceptTerms;
+
+    @AssertTrue(message = "L'accettazione dell'Informativa Privacy e obbligatoria.")
+    private boolean acceptPrivacy;
+}

backend/src/main/java/com/printcalculator/dto/CustomerDto.java

@@ -0,0 +1,10 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+
+@Data
+public class CustomerDto {
+    private String email;
+    private String phone;
+    private String customerType; // "PRIVATE", "BUSINESS"
+}

backend/src/main/java/com/printcalculator/dto/OptionsResponse.java

@@ -0,0 +1,27 @@
+package com.printcalculator.dto;
+
+import java.util.List;
+
+public record OptionsResponse(
+    List<MaterialOption> materials,
+    List<QualityOption> qualities,
+    List<InfillPatternOption> infillPatterns,
+    List<LayerHeightOptionDTO> layerHeights,
+    List<NozzleOptionDTO> nozzleDiameters
+) {
+    public record MaterialOption(String code, String label, List<VariantOption> variants) {}
+    public record VariantOption(
+            Long id,
+            String name,
+            String colorName,
+            String hexColor,
+            String finishType,
+            Double stockSpools,
+            Double stockFilamentGrams,
+            boolean isOutOfStock
+    ) {}
+    public record QualityOption(String id, String label) {}
+    public record InfillPatternOption(String id, String label) {}
+    public record LayerHeightOptionDTO(double value, String label) {}
+    public record NozzleOptionDTO(double value, String label) {}
+}

backend/src/main/java/com/printcalculator/dto/OrderDto.java

@@ -0,0 +1,114 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.UUID;
+
+public class OrderDto {
+    private UUID id;
+    private String orderNumber;
+    private String status;
+    private String paymentStatus;
+    private String paymentMethod;
+    private String customerEmail;
+    private String customerPhone;
+    private String preferredLanguage;
+    private String billingCustomerType;
+    private AddressDto billingAddress;
+    private AddressDto shippingAddress;
+    private Boolean shippingSameAsBilling;
+    private String currency;
+    private BigDecimal setupCostChf;
+    private BigDecimal shippingCostChf;
+    private BigDecimal discountChf;
+    private BigDecimal subtotalChf;
+    private BigDecimal totalChf;
+    private OffsetDateTime createdAt;
+    private String printMaterialCode;
+    private BigDecimal printNozzleDiameterMm;
+    private BigDecimal printLayerHeightMm;
+    private String printInfillPattern;
+    private Integer printInfillPercent;
+    private Boolean printSupportsEnabled;
+    private List<OrderItemDto> items;
+
+    // Getters and Setters
+    public UUID getId() { return id; }
+    public void setId(UUID id) { this.id = id; }
+
+    public String getOrderNumber() { return orderNumber; }
+    public void setOrderNumber(String orderNumber) { this.orderNumber = orderNumber; }
+
+    public String getStatus() { return status; }
+    public void setStatus(String status) { this.status = status; }
+
+    public String getPaymentStatus() { return paymentStatus; }
+    public void setPaymentStatus(String paymentStatus) { this.paymentStatus = paymentStatus; }
+
+    public String getPaymentMethod() { return paymentMethod; }
+    public void setPaymentMethod(String paymentMethod) { this.paymentMethod = paymentMethod; }
+
+    public String getCustomerEmail() { return customerEmail; }
+    public void setCustomerEmail(String customerEmail) { this.customerEmail = customerEmail; }
+
+    public String getCustomerPhone() { return customerPhone; }
+    public void setCustomerPhone(String customerPhone) { this.customerPhone = customerPhone; }
+
+    public String getPreferredLanguage() { return preferredLanguage; }
+    public void setPreferredLanguage(String preferredLanguage) { this.preferredLanguage = preferredLanguage; }
+
+    public String getBillingCustomerType() { return billingCustomerType; }
+    public void setBillingCustomerType(String billingCustomerType) { this.billingCustomerType = billingCustomerType; }
+
+    public AddressDto getBillingAddress() { return billingAddress; }
+    public void setBillingAddress(AddressDto billingAddress) { this.billingAddress = billingAddress; }
+
+    public AddressDto getShippingAddress() { return shippingAddress; }
+    public void setShippingAddress(AddressDto shippingAddress) { this.shippingAddress = shippingAddress; }
+
+    public Boolean getShippingSameAsBilling() { return shippingSameAsBilling; }
+    public void setShippingSameAsBilling(Boolean shippingSameAsBilling) { this.shippingSameAsBilling = shippingSameAsBilling; }
+
+    public String getCurrency() { return currency; }
+    public void setCurrency(String currency) { this.currency = currency; }
+
+    public BigDecimal getSetupCostChf() { return setupCostChf; }
+    public void setSetupCostChf(BigDecimal setupCostChf) { this.setupCostChf = setupCostChf; }
+
+    public BigDecimal getShippingCostChf() { return shippingCostChf; }
+    public void setShippingCostChf(BigDecimal shippingCostChf) { this.shippingCostChf = shippingCostChf; }
+
+    public BigDecimal getDiscountChf() { return discountChf; }
+    public void setDiscountChf(BigDecimal discountChf) { this.discountChf = discountChf; }
+
+    public BigDecimal getSubtotalChf() { return subtotalChf; }
+    public void setSubtotalChf(BigDecimal subtotalChf) { this.subtotalChf = subtotalChf; }
+
+    public BigDecimal getTotalChf() { return totalChf; }
+    public void setTotalChf(BigDecimal totalChf) { this.totalChf = totalChf; }
+
+    public OffsetDateTime getCreatedAt() { return createdAt; }
+    public void setCreatedAt(OffsetDateTime createdAt) { this.createdAt = createdAt; }
+
+    public String getPrintMaterialCode() { return printMaterialCode; }
+    public void setPrintMaterialCode(String printMaterialCode) { this.printMaterialCode = printMaterialCode; }
+
+    public BigDecimal getPrintNozzleDiameterMm() { return printNozzleDiameterMm; }
+    public void setPrintNozzleDiameterMm(BigDecimal printNozzleDiameterMm) { this.printNozzleDiameterMm = printNozzleDiameterMm; }
+
+    public BigDecimal getPrintLayerHeightMm() { return printLayerHeightMm; }
+    public void setPrintLayerHeightMm(BigDecimal printLayerHeightMm) { this.printLayerHeightMm = printLayerHeightMm; }
+
+    public String getPrintInfillPattern() { return printInfillPattern; }
+    public void setPrintInfillPattern(String printInfillPattern) { this.printInfillPattern = printInfillPattern; }
+
+    public Integer getPrintInfillPercent() { return printInfillPercent; }
+    public void setPrintInfillPercent(Integer printInfillPercent) { this.printInfillPercent = printInfillPercent; }
+
+    public Boolean getPrintSupportsEnabled() { return printSupportsEnabled; }
+    public void setPrintSupportsEnabled(Boolean printSupportsEnabled) { this.printSupportsEnabled = printSupportsEnabled; }
+
+    public List<OrderItemDto> getItems() { return items; }
+    public void setItems(List<OrderItemDto> items) { this.items = items; }
+}

backend/src/main/java/com/printcalculator/dto/OrderItemDto.java

@@ -0,0 +1,44 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.util.UUID;
+
+public class OrderItemDto {
+    private UUID id;
+    private String originalFilename;
+    private String materialCode;
+    private String colorCode;
+    private Integer quantity;
+    private Integer printTimeSeconds;
+    private BigDecimal materialGrams;
+    private BigDecimal unitPriceChf;
+    private BigDecimal lineTotalChf;
+
+    // Getters and Setters
+    public UUID getId() { return id; }
+    public void setId(UUID id) { this.id = id; }
+
+    public String getOriginalFilename() { return originalFilename; }
+    public void setOriginalFilename(String originalFilename) { this.originalFilename = originalFilename; }
+
+    public String getMaterialCode() { return materialCode; }
+    public void setMaterialCode(String materialCode) { this.materialCode = materialCode; }
+
+    public String getColorCode() { return colorCode; }
+    public void setColorCode(String colorCode) { this.colorCode = colorCode; }
+
+    public Integer getQuantity() { return quantity; }
+    public void setQuantity(Integer quantity) { this.quantity = quantity; }
+
+    public Integer getPrintTimeSeconds() { return printTimeSeconds; }
+    public void setPrintTimeSeconds(Integer printTimeSeconds) { this.printTimeSeconds = printTimeSeconds; }
+
+    public BigDecimal getMaterialGrams() { return materialGrams; }
+    public void setMaterialGrams(BigDecimal materialGrams) { this.materialGrams = materialGrams; }
+
+    public BigDecimal getUnitPriceChf() { return unitPriceChf; }
+    public void setUnitPriceChf(BigDecimal unitPriceChf) { this.unitPriceChf = unitPriceChf; }
+
+    public BigDecimal getLineTotalChf() { return lineTotalChf; }
+    public void setLineTotalChf(BigDecimal lineTotalChf) { this.lineTotalChf = lineTotalChf; }
+}

backend/src/main/java/com/printcalculator/dto/PrintSettingsDto.java

@@ -0,0 +1,31 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+
+@Data
+public class PrintSettingsDto {
+    // Mode: "BASIC" or "ADVANCED"
+    private String complexityMode;
+    
+    // Common
+    private String material; // e.g. "PLA", "PLA TOUGH", "PETG"
+    private String color;    // e.g. "White", "#FFFFFF"
+    private Long filamentVariantId;
+    private Long printerMachineId;
+    
+    // Basic Mode
+    private String quality;  // "draft", "standard", "high"
+    
+    // Advanced Mode (Optional in Basic)
+    private Double nozzleDiameter;
+    private Double layerHeight;
+    private Double infillDensity;
+    private String infillPattern;
+    private Boolean supportsEnabled;
+    private String notes;
+
+    // Dimensions
+    private Double boundingBoxX;
+    private Double boundingBoxY;
+    private Double boundingBoxZ;
+}

backend/src/main/java/com/printcalculator/dto/QuoteRequestDto.java

@@ -0,0 +1,22 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+import jakarta.validation.constraints.AssertTrue;
+
+@Data
+public class QuoteRequestDto {
+    private String requestType; // "PRINT_SERVICE" or "DESIGN_SERVICE"
+    private String customerType; // "PRIVATE" or "BUSINESS"
+    private String email;
+    private String phone;
+    private String name;
+    private String companyName;
+    private String contactPerson;
+    private String message;
+
+    @AssertTrue(message = "L'accettazione dei Termini e Condizioni e obbligatoria.")
+    private boolean acceptTerms;
+
+    @AssertTrue(message = "L'accettazione dell'Informativa Privacy e obbligatoria.")
+    private boolean acceptPrivacy;
+}

backend/src/main/java/com/printcalculator/entity/CustomQuoteRequest.java

@@ -0,0 +1,149 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "custom_quote_requests", indexes = {@Index(name = "ix_custom_quote_requests_status",
+        columnList = "status")})
+public class CustomQuoteRequest {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "request_id", nullable = false)
+    private UUID id;
+
+    @Column(name = "request_type", nullable = false, length = Integer.MAX_VALUE)
+    private String requestType;
+
+    @Column(name = "customer_type", nullable = false, length = Integer.MAX_VALUE)
+    private String customerType;
+
+    @Column(name = "email", nullable = false, length = Integer.MAX_VALUE)
+    private String email;
+
+    @Column(name = "phone", length = Integer.MAX_VALUE)
+    private String phone;
+
+    @Column(name = "name", length = Integer.MAX_VALUE)
+    private String name;
+
+    @Column(name = "company_name", length = Integer.MAX_VALUE)
+    private String companyName;
+
+    @Column(name = "contact_person", length = Integer.MAX_VALUE)
+    private String contactPerson;
+
+    @Column(name = "message", nullable = false, length = Integer.MAX_VALUE)
+    private String message;
+
+    @Column(name = "status", nullable = false, length = Integer.MAX_VALUE)
+    private String status;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    @ColumnDefault("now()")
+    @Column(name = "updated_at", nullable = false)
+    private OffsetDateTime updatedAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getRequestType() {
+        return requestType;
+    }
+
+    public void setRequestType(String requestType) {
+        this.requestType = requestType;
+    }
+
+    public String getCustomerType() {
+        return customerType;
+    }
+
+    public void setCustomerType(String customerType) {
+        this.customerType = customerType;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCompanyName() {
+        return companyName;
+    }
+
+    public void setCompanyName(String companyName) {
+        this.companyName = companyName;
+    }
+
+    public String getContactPerson() {
+        return contactPerson;
+    }
+
+    public void setContactPerson(String contactPerson) {
+        this.contactPerson = contactPerson;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(OffsetDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/CustomQuoteRequestAttachment.java

@@ -0,0 +1,121 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.OnDelete;
+import org.hibernate.annotations.OnDeleteAction;
+
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "custom_quote_request_attachments", indexes = {@Index(name = "ix_custom_quote_attachments_request",
+        columnList = "request_id")})
+public class CustomQuoteRequestAttachment {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "attachment_id", nullable = false)
+    private UUID id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @OnDelete(action = OnDeleteAction.CASCADE)
+    @JoinColumn(name = "request_id", nullable = false)
+    private CustomQuoteRequest request;
+
+    @Column(name = "original_filename", nullable = false, length = Integer.MAX_VALUE)
+    private String originalFilename;
+
+    @Column(name = "stored_relative_path", nullable = false, length = Integer.MAX_VALUE)
+    private String storedRelativePath;
+
+    @Column(name = "stored_filename", nullable = false, length = Integer.MAX_VALUE)
+    private String storedFilename;
+
+    @Column(name = "file_size_bytes")
+    private Long fileSizeBytes;
+
+    @Column(name = "mime_type", length = Integer.MAX_VALUE)
+    private String mimeType;
+
+    @Column(name = "sha256_hex", length = Integer.MAX_VALUE)
+    private String sha256Hex;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public CustomQuoteRequest getRequest() {
+        return request;
+    }
+
+    public void setRequest(CustomQuoteRequest request) {
+        this.request = request;
+    }
+
+    public String getOriginalFilename() {
+        return originalFilename;
+    }
+
+    public void setOriginalFilename(String originalFilename) {
+        this.originalFilename = originalFilename;
+    }
+
+    public String getStoredRelativePath() {
+        return storedRelativePath;
+    }
+
+    public void setStoredRelativePath(String storedRelativePath) {
+        this.storedRelativePath = storedRelativePath;
+    }
+
+    public String getStoredFilename() {
+        return storedFilename;
+    }
+
+    public void setStoredFilename(String storedFilename) {
+        this.storedFilename = storedFilename;
+    }
+
+    public Long getFileSizeBytes() {
+        return fileSizeBytes;
+    }
+
+    public void setFileSizeBytes(Long fileSizeBytes) {
+        this.fileSizeBytes = fileSizeBytes;
+    }
+
+    public String getMimeType() {
+        return mimeType;
+    }
+
+    public void setMimeType(String mimeType) {
+        this.mimeType = mimeType;
+    }
+
+    public String getSha256Hex() {
+        return sha256Hex;
+    }
+
+    public void setSha256Hex(String sha256Hex) {
+        this.sha256Hex = sha256Hex;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public void setCustomQuoteRequest(CustomQuoteRequest request) {
+    }
+}

backend/src/main/java/com/printcalculator/entity/Customer.java

@@ -0,0 +1,126 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "customers")
+public class Customer {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "customer_id", nullable = false)
+    private UUID id;
+
+    @Column(name = "customer_type", nullable = false, length = Integer.MAX_VALUE)
+    private String customerType;
+
+    @Column(name = "email", nullable = false, length = Integer.MAX_VALUE)
+    private String email;
+
+    @Column(name = "phone", length = Integer.MAX_VALUE)
+    private String phone;
+
+    @Column(name = "first_name", length = Integer.MAX_VALUE)
+    private String firstName;
+
+    @Column(name = "last_name", length = Integer.MAX_VALUE)
+    private String lastName;
+
+    @Column(name = "company_name", length = Integer.MAX_VALUE)
+    private String companyName;
+
+    @Column(name = "contact_person", length = Integer.MAX_VALUE)
+    private String contactPerson;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    @ColumnDefault("now()")
+    @Column(name = "updated_at", nullable = false)
+    private OffsetDateTime updatedAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getCustomerType() {
+        return customerType;
+    }
+
+    public void setCustomerType(String customerType) {
+        this.customerType = customerType;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getCompanyName() {
+        return companyName;
+    }
+
+    public void setCompanyName(String companyName) {
+        this.companyName = companyName;
+    }
+
+    public String getContactPerson() {
+        return contactPerson;
+    }
+
+    public void setContactPerson(String contactPerson) {
+        this.contactPerson = contactPerson;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(OffsetDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/FilamentMaterialType.java

@@ -0,0 +1,68 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+@Entity
+@Table(name = "filament_material_type")
+public class FilamentMaterialType {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "filament_material_type_id", nullable = false)
+    private Long id;
+
+    @Column(name = "material_code", nullable = false, length = Integer.MAX_VALUE)
+    private String materialCode;
+
+    @ColumnDefault("false")
+    @Column(name = "is_flexible", nullable = false)
+    private Boolean isFlexible;
+
+    @ColumnDefault("false")
+    @Column(name = "is_technical", nullable = false)
+    private Boolean isTechnical;
+
+    @Column(name = "technical_type_label", length = Integer.MAX_VALUE)
+    private String technicalTypeLabel;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public Boolean getIsFlexible() {
+        return isFlexible;
+    }
+
+    public void setIsFlexible(Boolean isFlexible) {
+        this.isFlexible = isFlexible;
+    }
+
+    public Boolean getIsTechnical() {
+        return isTechnical;
+    }
+
+    public void setIsTechnical(Boolean isTechnical) {
+        this.isTechnical = isTechnical;
+    }
+
+    public String getTechnicalTypeLabel() {
+        return technicalTypeLabel;
+    }
+
+    public void setTechnicalTypeLabel(String technicalTypeLabel) {
+        this.technicalTypeLabel = technicalTypeLabel;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/FilamentVariant.java

@@ -0,0 +1,176 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+
+@Entity
+@Table(name = "filament_variant")
+public class FilamentVariant {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "filament_variant_id", nullable = false)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "filament_material_type_id", nullable = false)
+    private FilamentMaterialType filamentMaterialType;
+
+    @Column(name = "variant_display_name", nullable = false, length = Integer.MAX_VALUE)
+    private String variantDisplayName;
+
+    @Column(name = "color_name", nullable = false, length = Integer.MAX_VALUE)
+    private String colorName;
+
+    @Column(name = "color_hex", length = Integer.MAX_VALUE)
+    private String colorHex;
+
+    @ColumnDefault("'GLOSSY'")
+    @Column(name = "finish_type", length = Integer.MAX_VALUE)
+    private String finishType;
+
+    @Column(name = "brand", length = Integer.MAX_VALUE)
+    private String brand;
+
+    @ColumnDefault("false")
+    @Column(name = "is_matte", nullable = false)
+    private Boolean isMatte;
+
+    @ColumnDefault("false")
+    @Column(name = "is_special", nullable = false)
+    private Boolean isSpecial;
+
+    @Column(name = "cost_chf_per_kg", nullable = false, precision = 10, scale = 2)
+    private BigDecimal costChfPerKg;
+
+    @ColumnDefault("0.000")
+    @Column(name = "stock_spools", nullable = false, precision = 6, scale = 3)
+    private BigDecimal stockSpools;
+
+    @ColumnDefault("1.000")
+    @Column(name = "spool_net_kg", nullable = false, precision = 6, scale = 3)
+    private BigDecimal spoolNetKg;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public FilamentMaterialType getFilamentMaterialType() {
+        return filamentMaterialType;
+    }
+
+    public void setFilamentMaterialType(FilamentMaterialType filamentMaterialType) {
+        this.filamentMaterialType = filamentMaterialType;
+    }
+
+    public String getVariantDisplayName() {
+        return variantDisplayName;
+    }
+
+    public void setVariantDisplayName(String variantDisplayName) {
+        this.variantDisplayName = variantDisplayName;
+    }
+
+    public String getColorName() {
+        return colorName;
+    }
+
+    public void setColorName(String colorName) {
+        this.colorName = colorName;
+    }
+
+    public String getColorHex() {
+        return colorHex;
+    }
+
+    public void setColorHex(String colorHex) {
+        this.colorHex = colorHex;
+    }
+
+    public String getFinishType() {
+        return finishType;
+    }
+
+    public void setFinishType(String finishType) {
+        this.finishType = finishType;
+    }
+
+    public String getBrand() {
+        return brand;
+    }
+
+    public void setBrand(String brand) {
+        this.brand = brand;
+    }
+
+    public Boolean getIsMatte() {
+        return isMatte;
+    }
+
+    public void setIsMatte(Boolean isMatte) {
+        this.isMatte = isMatte;
+    }
+
+    public Boolean getIsSpecial() {
+        return isSpecial;
+    }
+
+    public void setIsSpecial(Boolean isSpecial) {
+        this.isSpecial = isSpecial;
+    }
+
+    public BigDecimal getCostChfPerKg() {
+        return costChfPerKg;
+    }
+
+    public void setCostChfPerKg(BigDecimal costChfPerKg) {
+        this.costChfPerKg = costChfPerKg;
+    }
+
+    public BigDecimal getStockSpools() {
+        return stockSpools;
+    }
+
+    public void setStockSpools(BigDecimal stockSpools) {
+        this.stockSpools = stockSpools;
+    }
+
+    public BigDecimal getSpoolNetKg() {
+        return spoolNetKg;
+    }
+
+    public void setSpoolNetKg(BigDecimal spoolNetKg) {
+        this.spoolNetKg = spoolNetKg;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/FilamentVariantOrcaOverride.java

@@ -0,0 +1,72 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+@Entity
+@Table(name = "filament_variant_orca_override", uniqueConstraints = {
+        @UniqueConstraint(name = "ux_filament_variant_orca_override_variant_machine", columnNames = {
+                "filament_variant_id", "printer_machine_profile_id"
+        })
+})
+public class FilamentVariantOrcaOverride {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "filament_variant_orca_override_id", nullable = false)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "filament_variant_id", nullable = false)
+    private FilamentVariant filamentVariant;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "printer_machine_profile_id", nullable = false)
+    private PrinterMachineProfile printerMachineProfile;
+
+    @Column(name = "orca_filament_profile_name", nullable = false, length = Integer.MAX_VALUE)
+    private String orcaFilamentProfileName;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public FilamentVariant getFilamentVariant() {
+        return filamentVariant;
+    }
+
+    public void setFilamentVariant(FilamentVariant filamentVariant) {
+        this.filamentVariant = filamentVariant;
+    }
+
+    public PrinterMachineProfile getPrinterMachineProfile() {
+        return printerMachineProfile;
+    }
+
+    public void setPrinterMachineProfile(PrinterMachineProfile printerMachineProfile) {
+        this.printerMachineProfile = printerMachineProfile;
+    }
+
+    public String getOrcaFilamentProfileName() {
+        return orcaFilamentProfileName;
+    }
+
+    public void setOrcaFilamentProfileName(String orcaFilamentProfileName) {
+        this.orcaFilamentProfileName = orcaFilamentProfileName;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+}

backend/src/main/java/com/printcalculator/entity/FilamentVariantStockKg.java

@@ -0,0 +1,44 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import org.hibernate.annotations.Immutable;
+
+import java.math.BigDecimal;
+
+@Entity
+@Immutable
+@Table(name = "filament_variant_stock_kg")
+public class FilamentVariantStockKg {
+    @Id
+    @Column(name = "filament_variant_id")
+    private Long filamentVariantId;
+
+    @Column(name = "stock_spools", precision = 6, scale = 3)
+    private BigDecimal stockSpools;
+
+    @Column(name = "spool_net_kg", precision = 6, scale = 3)
+    private BigDecimal spoolNetKg;
+
+    @Column(name = "stock_kg")
+    private BigDecimal stockKg;
+
+    public Long getFilamentVariantId() {
+        return filamentVariantId;
+    }
+
+    public BigDecimal getStockSpools() {
+        return stockSpools;
+    }
+
+    public BigDecimal getSpoolNetKg() {
+        return spoolNetKg;
+    }
+
+    public BigDecimal getStockKg() {
+        return stockKg;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/InfillPattern.java

@@ -0,0 +1,56 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+@Entity
+@Table(name = "infill_pattern")
+public class InfillPattern {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "infill_pattern_id", nullable = false)
+    private Long id;
+
+    @Column(name = "pattern_code", nullable = false, length = Integer.MAX_VALUE)
+    private String patternCode;
+
+    @Column(name = "display_name", nullable = false, length = Integer.MAX_VALUE)
+    private String displayName;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getPatternCode() {
+        return patternCode;
+    }
+
+    public void setPatternCode(String patternCode) {
+        this.patternCode = patternCode;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public void setDisplayName(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/LayerHeightOption.java

@@ -0,0 +1,59 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+
+@Entity
+@Table(name = "layer_height_option")
+public class LayerHeightOption {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "layer_height_option_id", nullable = false)
+    private Long id;
+
+    @Column(name = "layer_height_mm", nullable = false, precision = 5, scale = 3)
+    private BigDecimal layerHeightMm;
+
+    @ColumnDefault("1.000")
+    @Column(name = "time_multiplier", nullable = false, precision = 6, scale = 3)
+    private BigDecimal timeMultiplier;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public BigDecimal getLayerHeightMm() {
+        return layerHeightMm;
+    }
+
+    public void setLayerHeightMm(BigDecimal layerHeightMm) {
+        this.layerHeightMm = layerHeightMm;
+    }
+
+    public BigDecimal getTimeMultiplier() {
+        return timeMultiplier;
+    }
+
+    public void setTimeMultiplier(BigDecimal timeMultiplier) {
+        this.timeMultiplier = timeMultiplier;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/LayerHeightProfile.java

@@ -0,0 +1,80 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+
+@Entity
+@Table(name = "layer_height_profile")
+public class LayerHeightProfile {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "layer_height_profile_id", nullable = false)
+    private Long id;
+
+    @Column(name = "profile_name", nullable = false, length = Integer.MAX_VALUE)
+    private String profileName;
+
+    @Column(name = "min_layer_height_mm", nullable = false, precision = 5, scale = 3)
+    private BigDecimal minLayerHeightMm;
+
+    @Column(name = "max_layer_height_mm", nullable = false, precision = 5, scale = 3)
+    private BigDecimal maxLayerHeightMm;
+
+    @Column(name = "default_layer_height_mm", nullable = false, precision = 5, scale = 3)
+    private BigDecimal defaultLayerHeightMm;
+
+    @ColumnDefault("1.000")
+    @Column(name = "time_multiplier", nullable = false, precision = 6, scale = 3)
+    private BigDecimal timeMultiplier;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getProfileName() {
+        return profileName;
+    }
+
+    public void setProfileName(String profileName) {
+        this.profileName = profileName;
+    }
+
+    public BigDecimal getMinLayerHeightMm() {
+        return minLayerHeightMm;
+    }
+
+    public void setMinLayerHeightMm(BigDecimal minLayerHeightMm) {
+        this.minLayerHeightMm = minLayerHeightMm;
+    }
+
+    public BigDecimal getMaxLayerHeightMm() {
+        return maxLayerHeightMm;
+    }
+
+    public void setMaxLayerHeightMm(BigDecimal maxLayerHeightMm) {
+        this.maxLayerHeightMm = maxLayerHeightMm;
+    }
+
+    public BigDecimal getDefaultLayerHeightMm() {
+        return defaultLayerHeightMm;
+    }
+
+    public void setDefaultLayerHeightMm(BigDecimal defaultLayerHeightMm) {
+        this.defaultLayerHeightMm = defaultLayerHeightMm;
+    }
+
+    public BigDecimal getTimeMultiplier() {
+        return timeMultiplier;
+    }
+
+    public void setTimeMultiplier(BigDecimal timeMultiplier) {
+        this.timeMultiplier = timeMultiplier;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/MaterialOrcaProfileMap.java

@@ -0,0 +1,72 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+@Entity
+@Table(name = "material_orca_profile_map", uniqueConstraints = {
+        @UniqueConstraint(name = "ux_material_orca_profile_map_machine_material", columnNames = {
+                "printer_machine_profile_id", "filament_material_type_id"
+        })
+})
+public class MaterialOrcaProfileMap {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "material_orca_profile_map_id", nullable = false)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "printer_machine_profile_id", nullable = false)
+    private PrinterMachineProfile printerMachineProfile;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "filament_material_type_id", nullable = false)
+    private FilamentMaterialType filamentMaterialType;
+
+    @Column(name = "orca_filament_profile_name", nullable = false, length = Integer.MAX_VALUE)
+    private String orcaFilamentProfileName;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public PrinterMachineProfile getPrinterMachineProfile() {
+        return printerMachineProfile;
+    }
+
+    public void setPrinterMachineProfile(PrinterMachineProfile printerMachineProfile) {
+        this.printerMachineProfile = printerMachineProfile;
+    }
+
+    public FilamentMaterialType getFilamentMaterialType() {
+        return filamentMaterialType;
+    }
+
+    public void setFilamentMaterialType(FilamentMaterialType filamentMaterialType) {
+        this.filamentMaterialType = filamentMaterialType;
+    }
+
+    public String getOrcaFilamentProfileName() {
+        return orcaFilamentProfileName;
+    }
+
+    public void setOrcaFilamentProfileName(String orcaFilamentProfileName) {
+        this.orcaFilamentProfileName = orcaFilamentProfileName;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+}

backend/src/main/java/com/printcalculator/entity/NozzleOption.java

@@ -0,0 +1,84 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+
+@Entity
+@Table(name = "nozzle_option")
+public class NozzleOption {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "nozzle_option_id", nullable = false)
+    private Long id;
+
+    @Column(name = "nozzle_diameter_mm", nullable = false, precision = 4, scale = 2)
+    private BigDecimal nozzleDiameterMm;
+
+    @ColumnDefault("0")
+    @Column(name = "owned_quantity", nullable = false)
+    private Integer ownedQuantity;
+
+    @ColumnDefault("0.00")
+    @Column(name = "extra_nozzle_change_fee_chf", nullable = false, precision = 10, scale = 2)
+    private BigDecimal extraNozzleChangeFeeChf;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public BigDecimal getNozzleDiameterMm() {
+        return nozzleDiameterMm;
+    }
+
+    public void setNozzleDiameterMm(BigDecimal nozzleDiameterMm) {
+        this.nozzleDiameterMm = nozzleDiameterMm;
+    }
+
+    public Integer getOwnedQuantity() {
+        return ownedQuantity;
+    }
+
+    public void setOwnedQuantity(Integer ownedQuantity) {
+        this.ownedQuantity = ownedQuantity;
+    }
+
+    public BigDecimal getExtraNozzleChangeFeeChf() {
+        return extraNozzleChangeFeeChf;
+    }
+
+    public void setExtraNozzleChangeFeeChf(BigDecimal extraNozzleChangeFeeChf) {
+        this.extraNozzleChangeFeeChf = extraNozzleChangeFeeChf;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/Order.java

@@ -0,0 +1,435 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "orders", indexes = {@Index(name = "ix_orders_status",
+        columnList = "status")})
+public class Order {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "order_id", nullable = false)
+    private UUID id;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "source_quote_session_id")
+    private QuoteSession sourceQuoteSession;
+
+    @Column(name = "status", nullable = false, length = Integer.MAX_VALUE)
+    private String status;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "customer_id")
+    private Customer customer;
+
+    @Column(name = "customer_email", nullable = false, length = Integer.MAX_VALUE)
+    private String customerEmail;
+
+    @Column(name = "customer_phone", length = Integer.MAX_VALUE)
+    private String customerPhone;
+
+    @Column(name = "billing_customer_type", nullable = false, length = Integer.MAX_VALUE)
+    private String billingCustomerType;
+
+    @Column(name = "billing_first_name", length = Integer.MAX_VALUE)
+    private String billingFirstName;
+
+    @Column(name = "billing_last_name", length = Integer.MAX_VALUE)
+    private String billingLastName;
+
+    @Column(name = "billing_company_name", length = Integer.MAX_VALUE)
+    private String billingCompanyName;
+
+    @Column(name = "billing_contact_person", length = Integer.MAX_VALUE)
+    private String billingContactPerson;
+
+    @Column(name = "billing_address_line1", nullable = false, length = Integer.MAX_VALUE)
+    private String billingAddressLine1;
+
+    @Column(name = "billing_address_line2", length = Integer.MAX_VALUE)
+    private String billingAddressLine2;
+
+    @Column(name = "billing_zip", nullable = false, length = Integer.MAX_VALUE)
+    private String billingZip;
+
+    @Column(name = "billing_city", nullable = false, length = Integer.MAX_VALUE)
+    private String billingCity;
+
+    @ColumnDefault("'CH'")
+    @Column(name = "billing_country_code", nullable = false, length = 2)
+    private String billingCountryCode;
+
+    @ColumnDefault("true")
+    @Column(name = "shipping_same_as_billing", nullable = false)
+    private Boolean shippingSameAsBilling;
+
+    @Column(name = "shipping_first_name", length = Integer.MAX_VALUE)
+    private String shippingFirstName;
+
+    @Column(name = "shipping_last_name", length = Integer.MAX_VALUE)
+    private String shippingLastName;
+
+    @Column(name = "shipping_company_name", length = Integer.MAX_VALUE)
+    private String shippingCompanyName;
+
+    @Column(name = "shipping_contact_person", length = Integer.MAX_VALUE)
+    private String shippingContactPerson;
+
+    @Column(name = "shipping_address_line1", length = Integer.MAX_VALUE)
+    private String shippingAddressLine1;
+
+    @Column(name = "shipping_address_line2", length = Integer.MAX_VALUE)
+    private String shippingAddressLine2;
+
+    @Column(name = "shipping_zip", length = Integer.MAX_VALUE)
+    private String shippingZip;
+
+    @Column(name = "shipping_city", length = Integer.MAX_VALUE)
+    private String shippingCity;
+
+    @Column(name = "shipping_country_code", length = 2)
+    private String shippingCountryCode;
+
+    @ColumnDefault("'it'")
+    @Column(name = "preferred_language", length = 2)
+    private String preferredLanguage;
+
+    @ColumnDefault("'CHF'")
+    @Column(name = "currency", nullable = false, length = 3)
+    private String currency;
+
+    @ColumnDefault("0.00")
+    @Column(name = "setup_cost_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal setupCostChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "shipping_cost_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal shippingCostChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "discount_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal discountChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "subtotal_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal subtotalChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "total_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal totalChf;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    @ColumnDefault("now()")
+    @Column(name = "updated_at", nullable = false)
+    private OffsetDateTime updatedAt;
+
+    @Column(name = "paid_at")
+    private OffsetDateTime paidAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    @Transient
+    public String getOrderNumber() {
+        if (id == null) {
+            return null;
+        }
+        String rawId = id.toString();
+        int dashIndex = rawId.indexOf('-');
+        return dashIndex > 0 ? rawId.substring(0, dashIndex) : rawId;
+    }
+
+    public QuoteSession getSourceQuoteSession() {
+        return sourceQuoteSession;
+    }
+
+    public void setSourceQuoteSession(QuoteSession sourceQuoteSession) {
+        this.sourceQuoteSession = sourceQuoteSession;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public Customer getCustomer() {
+        return customer;
+    }
+
+    public void setCustomer(Customer customer) {
+        this.customer = customer;
+    }
+
+    public String getCustomerEmail() {
+        return customerEmail;
+    }
+
+    public void setCustomerEmail(String customerEmail) {
+        this.customerEmail = customerEmail;
+    }
+
+    public String getCustomerPhone() {
+        return customerPhone;
+    }
+
+    public void setCustomerPhone(String customerPhone) {
+        this.customerPhone = customerPhone;
+    }
+
+    public String getBillingCustomerType() {
+        return billingCustomerType;
+    }
+
+    public void setBillingCustomerType(String billingCustomerType) {
+        this.billingCustomerType = billingCustomerType;
+    }
+
+    public String getBillingFirstName() {
+        return billingFirstName;
+    }
+
+    public void setBillingFirstName(String billingFirstName) {
+        this.billingFirstName = billingFirstName;
+    }
+
+    public String getBillingLastName() {
+        return billingLastName;
+    }
+
+    public void setBillingLastName(String billingLastName) {
+        this.billingLastName = billingLastName;
+    }
+
+    public String getBillingCompanyName() {
+        return billingCompanyName;
+    }
+
+    public void setBillingCompanyName(String billingCompanyName) {
+        this.billingCompanyName = billingCompanyName;
+    }
+
+    public String getBillingContactPerson() {
+        return billingContactPerson;
+    }
+
+    public void setBillingContactPerson(String billingContactPerson) {
+        this.billingContactPerson = billingContactPerson;
+    }
+
+    public String getBillingAddressLine1() {
+        return billingAddressLine1;
+    }
+
+    public void setBillingAddressLine1(String billingAddressLine1) {
+        this.billingAddressLine1 = billingAddressLine1;
+    }
+
+    public String getBillingAddressLine2() {
+        return billingAddressLine2;
+    }
+
+    public void setBillingAddressLine2(String billingAddressLine2) {
+        this.billingAddressLine2 = billingAddressLine2;
+    }
+
+    public String getBillingZip() {
+        return billingZip;
+    }
+
+    public void setBillingZip(String billingZip) {
+        this.billingZip = billingZip;
+    }
+
+    public String getBillingCity() {
+        return billingCity;
+    }
+
+    public void setBillingCity(String billingCity) {
+        this.billingCity = billingCity;
+    }
+
+    public String getBillingCountryCode() {
+        return billingCountryCode;
+    }
+
+    public void setBillingCountryCode(String billingCountryCode) {
+        this.billingCountryCode = billingCountryCode;
+    }
+
+    public Boolean getShippingSameAsBilling() {
+        return shippingSameAsBilling;
+    }
+
+    public void setShippingSameAsBilling(Boolean shippingSameAsBilling) {
+        this.shippingSameAsBilling = shippingSameAsBilling;
+    }
+
+    public String getShippingFirstName() {
+        return shippingFirstName;
+    }
+
+    public void setShippingFirstName(String shippingFirstName) {
+        this.shippingFirstName = shippingFirstName;
+    }
+
+    public String getShippingLastName() {
+        return shippingLastName;
+    }
+
+    public void setShippingLastName(String shippingLastName) {
+        this.shippingLastName = shippingLastName;
+    }
+
+    public String getShippingCompanyName() {
+        return shippingCompanyName;
+    }
+
+    public void setShippingCompanyName(String shippingCompanyName) {
+        this.shippingCompanyName = shippingCompanyName;
+    }
+
+    public String getShippingContactPerson() {
+        return shippingContactPerson;
+    }
+
+    public void setShippingContactPerson(String shippingContactPerson) {
+        this.shippingContactPerson = shippingContactPerson;
+    }
+
+    public String getShippingAddressLine1() {
+        return shippingAddressLine1;
+    }
+
+    public void setShippingAddressLine1(String shippingAddressLine1) {
+        this.shippingAddressLine1 = shippingAddressLine1;
+    }
+
+    public String getShippingAddressLine2() {
+        return shippingAddressLine2;
+    }
+
+    public void setShippingAddressLine2(String shippingAddressLine2) {
+        this.shippingAddressLine2 = shippingAddressLine2;
+    }
+
+    public String getShippingZip() {
+        return shippingZip;
+    }
+
+    public void setShippingZip(String shippingZip) {
+        this.shippingZip = shippingZip;
+    }
+
+    public String getShippingCity() {
+        return shippingCity;
+    }
+
+    public void setShippingCity(String shippingCity) {
+        this.shippingCity = shippingCity;
+    }
+
+    public String getShippingCountryCode() {
+        return shippingCountryCode;
+    }
+
+    public void setShippingCountryCode(String shippingCountryCode) {
+        this.shippingCountryCode = shippingCountryCode;
+    }
+
+    public String getCurrency() {
+        return currency;
+    }
+
+    public void setCurrency(String currency) {
+        this.currency = currency;
+    }
+
+    public String getPreferredLanguage() {
+        return preferredLanguage;
+    }
+
+    public void setPreferredLanguage(String preferredLanguage) {
+        this.preferredLanguage = preferredLanguage;
+    }
+
+    public BigDecimal getSetupCostChf() {
+        return setupCostChf;
+    }
+
+    public void setSetupCostChf(BigDecimal setupCostChf) {
+        this.setupCostChf = setupCostChf;
+    }
+
+    public BigDecimal getShippingCostChf() {
+        return shippingCostChf;
+    }
+
+    public void setShippingCostChf(BigDecimal shippingCostChf) {
+        this.shippingCostChf = shippingCostChf;
+    }
+
+    public BigDecimal getDiscountChf() {
+        return discountChf;
+    }
+
+    public void setDiscountChf(BigDecimal discountChf) {
+        this.discountChf = discountChf;
+    }
+
+    public BigDecimal getSubtotalChf() {
+        return subtotalChf;
+    }
+
+    public void setSubtotalChf(BigDecimal subtotalChf) {
+        this.subtotalChf = subtotalChf;
+    }
+
+    public BigDecimal getTotalChf() {
+        return totalChf;
+    }
+
+    public void setTotalChf(BigDecimal totalChf) {
+        this.totalChf = totalChf;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(OffsetDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
+    public OffsetDateTime getPaidAt() {
+        return paidAt;
+    }
+
+    public void setPaidAt(OffsetDateTime paidAt) {
+        this.paidAt = paidAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/OrderItem.java

@@ -0,0 +1,253 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.OnDelete;
+import org.hibernate.annotations.OnDeleteAction;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "order_items", indexes = {@Index(name = "ix_order_items_order",
+        columnList = "order_id")})
+public class OrderItem {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "order_item_id", nullable = false)
+    private UUID id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @OnDelete(action = OnDeleteAction.CASCADE)
+    @JoinColumn(name = "order_id", nullable = false)
+    private Order order;
+
+    @Column(name = "original_filename", nullable = false, length = Integer.MAX_VALUE)
+    private String originalFilename;
+
+    @Column(name = "stored_relative_path", nullable = false, length = Integer.MAX_VALUE)
+    private String storedRelativePath;
+
+    @Column(name = "stored_filename", nullable = false, length = Integer.MAX_VALUE)
+    private String storedFilename;
+
+    @Column(name = "file_size_bytes")
+    private Long fileSizeBytes;
+
+    @Column(name = "mime_type", length = Integer.MAX_VALUE)
+    private String mimeType;
+
+    @Column(name = "sha256_hex", length = Integer.MAX_VALUE)
+    private String sha256Hex;
+
+    @Column(name = "material_code", nullable = false, length = Integer.MAX_VALUE)
+    private String materialCode;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "filament_variant_id")
+    private FilamentVariant filamentVariant;
+
+    @Column(name = "color_code", length = Integer.MAX_VALUE)
+    private String colorCode;
+
+    @ColumnDefault("1")
+    @Column(name = "quantity", nullable = false)
+    private Integer quantity;
+
+    @Column(name = "print_time_seconds")
+    private Integer printTimeSeconds;
+
+    @Column(name = "material_grams", precision = 12, scale = 2)
+    private BigDecimal materialGrams;
+
+    @Column(name = "bounding_box_x_mm", precision = 10, scale = 3)
+    private BigDecimal boundingBoxXMm;
+
+    @Column(name = "bounding_box_y_mm", precision = 10, scale = 3)
+    private BigDecimal boundingBoxYMm;
+
+    @Column(name = "bounding_box_z_mm", precision = 10, scale = 3)
+    private BigDecimal boundingBoxZMm;
+
+    @Column(name = "unit_price_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal unitPriceChf;
+
+    @Column(name = "line_total_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal lineTotalChf;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    @PrePersist
+    private void onCreate() {
+        if (createdAt == null) {
+            createdAt = OffsetDateTime.now();
+        }
+        if (quantity == null) {
+            quantity = 1;
+        }
+    }
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public Order getOrder() {
+        return order;
+    }
+
+    public void setOrder(Order order) {
+        this.order = order;
+    }
+
+    public String getOriginalFilename() {
+        return originalFilename;
+    }
+
+    public void setOriginalFilename(String originalFilename) {
+        this.originalFilename = originalFilename;
+    }
+
+    public String getStoredRelativePath() {
+        return storedRelativePath;
+    }
+
+    public void setStoredRelativePath(String storedRelativePath) {
+        this.storedRelativePath = storedRelativePath;
+    }
+
+    public String getStoredFilename() {
+        return storedFilename;
+    }
+
+    public void setStoredFilename(String storedFilename) {
+        this.storedFilename = storedFilename;
+    }
+
+    public Long getFileSizeBytes() {
+        return fileSizeBytes;
+    }
+
+    public void setFileSizeBytes(Long fileSizeBytes) {
+        this.fileSizeBytes = fileSizeBytes;
+    }
+
+    public String getMimeType() {
+        return mimeType;
+    }
+
+    public void setMimeType(String mimeType) {
+        this.mimeType = mimeType;
+    }
+
+    public String getSha256Hex() {
+        return sha256Hex;
+    }
+
+    public void setSha256Hex(String sha256Hex) {
+        this.sha256Hex = sha256Hex;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public FilamentVariant getFilamentVariant() {
+        return filamentVariant;
+    }
+
+    public void setFilamentVariant(FilamentVariant filamentVariant) {
+        this.filamentVariant = filamentVariant;
+    }
+
+    public String getColorCode() {
+        return colorCode;
+    }
+
+    public void setColorCode(String colorCode) {
+        this.colorCode = colorCode;
+    }
+
+    public Integer getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(Integer quantity) {
+        this.quantity = quantity;
+    }
+
+    public Integer getPrintTimeSeconds() {
+        return printTimeSeconds;
+    }
+
+    public void setPrintTimeSeconds(Integer printTimeSeconds) {
+        this.printTimeSeconds = printTimeSeconds;
+    }
+
+    public BigDecimal getMaterialGrams() {
+        return materialGrams;
+    }
+
+    public void setMaterialGrams(BigDecimal materialGrams) {
+        this.materialGrams = materialGrams;
+    }
+
+    public BigDecimal getBoundingBoxXMm() {
+        return boundingBoxXMm;
+    }
+
+    public void setBoundingBoxXMm(BigDecimal boundingBoxXMm) {
+        this.boundingBoxXMm = boundingBoxXMm;
+    }
+
+    public BigDecimal getBoundingBoxYMm() {
+        return boundingBoxYMm;
+    }
+
+    public void setBoundingBoxYMm(BigDecimal boundingBoxYMm) {
+        this.boundingBoxYMm = boundingBoxYMm;
+    }
+
+    public BigDecimal getBoundingBoxZMm() {
+        return boundingBoxZMm;
+    }
+
+    public void setBoundingBoxZMm(BigDecimal boundingBoxZMm) {
+        this.boundingBoxZMm = boundingBoxZMm;
+    }
+
+    public BigDecimal getUnitPriceChf() {
+        return unitPriceChf;
+    }
+
+    public void setUnitPriceChf(BigDecimal unitPriceChf) {
+        this.unitPriceChf = unitPriceChf;
+    }
+
+    public BigDecimal getLineTotalChf() {
+        return lineTotalChf;
+    }
+
+    public void setLineTotalChf(BigDecimal lineTotalChf) {
+        this.lineTotalChf = lineTotalChf;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/Payment.java

@@ -0,0 +1,157 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.OnDelete;
+import org.hibernate.annotations.OnDeleteAction;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "payments", indexes = {
+        @Index(name = "ix_payments_order",
+                columnList = "order_id"),
+        @Index(name = "ix_payments_reference",
+                columnList = "payment_reference")})
+public class Payment {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "payment_id", nullable = false)
+    private UUID id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @OnDelete(action = OnDeleteAction.CASCADE)
+    @JoinColumn(name = "order_id", nullable = false)
+    private Order order;
+
+    @Column(name = "method", nullable = false, length = Integer.MAX_VALUE)
+    private String method;
+
+    @Column(name = "status", nullable = false, length = Integer.MAX_VALUE)
+    private String status;
+
+    @ColumnDefault("'CHF'")
+    @Column(name = "currency", nullable = false, length = 3)
+    private String currency;
+
+    @Column(name = "amount_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal amountChf;
+
+    @Column(name = "payment_reference", length = Integer.MAX_VALUE)
+    private String paymentReference;
+
+    @Column(name = "provider_transaction_id", length = Integer.MAX_VALUE)
+    private String providerTransactionId;
+
+    @Column(name = "qr_payload", length = Integer.MAX_VALUE)
+    private String qrPayload;
+
+    @ColumnDefault("now()")
+    @Column(name = "initiated_at", nullable = false)
+    private OffsetDateTime initiatedAt;
+
+    @Column(name = "reported_at")
+    private OffsetDateTime reportedAt;
+
+    @Column(name = "received_at")
+    private OffsetDateTime receivedAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public Order getOrder() {
+        return order;
+    }
+
+    public void setOrder(Order order) {
+        this.order = order;
+    }
+
+    public String getMethod() {
+        return method;
+    }
+
+    public void setMethod(String method) {
+        this.method = method;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public String getCurrency() {
+        return currency;
+    }
+
+    public void setCurrency(String currency) {
+        this.currency = currency;
+    }
+
+    public BigDecimal getAmountChf() {
+        return amountChf;
+    }
+
+    public void setAmountChf(BigDecimal amountChf) {
+        this.amountChf = amountChf;
+    }
+
+    public String getPaymentReference() {
+        return paymentReference;
+    }
+
+    public void setPaymentReference(String paymentReference) {
+        this.paymentReference = paymentReference;
+    }
+
+    public String getProviderTransactionId() {
+        return providerTransactionId;
+    }
+
+    public void setProviderTransactionId(String providerTransactionId) {
+        this.providerTransactionId = providerTransactionId;
+    }
+
+    public String getQrPayload() {
+        return qrPayload;
+    }
+
+    public void setQrPayload(String qrPayload) {
+        this.qrPayload = qrPayload;
+    }
+
+    public OffsetDateTime getInitiatedAt() {
+        return initiatedAt;
+    }
+
+    public void setInitiatedAt(OffsetDateTime initiatedAt) {
+        this.initiatedAt = initiatedAt;
+    }
+
+    public OffsetDateTime getReportedAt() {
+        return reportedAt;
+    }
+
+    public void setReportedAt(OffsetDateTime reportedAt) {
+        this.reportedAt = reportedAt;
+    }
+
+    public OffsetDateTime getReceivedAt() {
+        return receivedAt;
+    }
+
+    public void setReceivedAt(OffsetDateTime receivedAt) {
+        this.receivedAt = receivedAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/PricingPolicy.java

@@ -0,0 +1,141 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+
+@Entity
+@Table(name = "pricing_policy")
+public class PricingPolicy {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "pricing_policy_id", nullable = false)
+    private Long id;
+
+    @Column(name = "policy_name", nullable = false, length = Integer.MAX_VALUE)
+    private String policyName;
+
+    @Column(name = "valid_from", nullable = false)
+    private OffsetDateTime validFrom;
+
+    @Column(name = "valid_to")
+    private OffsetDateTime validTo;
+
+    @Column(name = "electricity_cost_chf_per_kwh", nullable = false, precision = 10, scale = 6)
+    private BigDecimal electricityCostChfPerKwh;
+
+    @ColumnDefault("20.000")
+    @Column(name = "markup_percent", nullable = false, precision = 6, scale = 3)
+    private BigDecimal markupPercent;
+
+    @ColumnDefault("0.00")
+    @Column(name = "fixed_job_fee_chf", nullable = false, precision = 10, scale = 2)
+    private BigDecimal fixedJobFeeChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "nozzle_change_base_fee_chf", nullable = false, precision = 10, scale = 2)
+    private BigDecimal nozzleChangeBaseFeeChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "cad_cost_chf_per_hour", nullable = false, precision = 10, scale = 2)
+    private BigDecimal cadCostChfPerHour;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getPolicyName() {
+        return policyName;
+    }
+
+    public void setPolicyName(String policyName) {
+        this.policyName = policyName;
+    }
+
+    public OffsetDateTime getValidFrom() {
+        return validFrom;
+    }
+
+    public void setValidFrom(OffsetDateTime validFrom) {
+        this.validFrom = validFrom;
+    }
+
+    public OffsetDateTime getValidTo() {
+        return validTo;
+    }
+
+    public void setValidTo(OffsetDateTime validTo) {
+        this.validTo = validTo;
+    }
+
+    public BigDecimal getElectricityCostChfPerKwh() {
+        return electricityCostChfPerKwh;
+    }
+
+    public void setElectricityCostChfPerKwh(BigDecimal electricityCostChfPerKwh) {
+        this.electricityCostChfPerKwh = electricityCostChfPerKwh;
+    }
+
+    public BigDecimal getMarkupPercent() {
+        return markupPercent;
+    }
+
+    public void setMarkupPercent(BigDecimal markupPercent) {
+        this.markupPercent = markupPercent;
+    }
+
+    public BigDecimal getFixedJobFeeChf() {
+        return fixedJobFeeChf;
+    }
+
+    public void setFixedJobFeeChf(BigDecimal fixedJobFeeChf) {
+        this.fixedJobFeeChf = fixedJobFeeChf;
+    }
+
+    public BigDecimal getNozzleChangeBaseFeeChf() {
+        return nozzleChangeBaseFeeChf;
+    }
+
+    public void setNozzleChangeBaseFeeChf(BigDecimal nozzleChangeBaseFeeChf) {
+        this.nozzleChangeBaseFeeChf = nozzleChangeBaseFeeChf;
+    }
+
+    public BigDecimal getCadCostChfPerHour() {
+        return cadCostChfPerHour;
+    }
+
+    public void setCadCostChfPerHour(BigDecimal cadCostChfPerHour) {
+        this.cadCostChfPerHour = cadCostChfPerHour;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/PricingPolicyMachineHourTier.java

@@ -0,0 +1,68 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+
+import java.math.BigDecimal;
+
+@Entity
+@Table(name = "pricing_policy_machine_hour_tier")
+public class PricingPolicyMachineHourTier {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "pricing_policy_machine_hour_tier_id", nullable = false)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "pricing_policy_id", nullable = false)
+    private PricingPolicy pricingPolicy;
+
+    @Column(name = "tier_start_hours", nullable = false, precision = 10, scale = 2)
+    private BigDecimal tierStartHours;
+
+    @Column(name = "tier_end_hours", precision = 10, scale = 2)
+    private BigDecimal tierEndHours;
+
+    @Column(name = "machine_cost_chf_per_hour", nullable = false, precision = 10, scale = 2)
+    private BigDecimal machineCostChfPerHour;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public PricingPolicy getPricingPolicy() {
+        return pricingPolicy;
+    }
+
+    public void setPricingPolicy(PricingPolicy pricingPolicy) {
+        this.pricingPolicy = pricingPolicy;
+    }
+
+    public BigDecimal getTierStartHours() {
+        return tierStartHours;
+    }
+
+    public void setTierStartHours(BigDecimal tierStartHours) {
+        this.tierStartHours = tierStartHours;
+    }
+
+    public BigDecimal getTierEndHours() {
+        return tierEndHours;
+    }
+
+    public void setTierEndHours(BigDecimal tierEndHours) {
+        this.tierEndHours = tierEndHours;
+    }
+
+    public BigDecimal getMachineCostChfPerHour() {
+        return machineCostChfPerHour;
+    }
+
+    public void setMachineCostChfPerHour(BigDecimal machineCostChfPerHour) {
+        this.machineCostChfPerHour = machineCostChfPerHour;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/PrinterFleetCurrent.java

@@ -0,0 +1,46 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+import org.hibernate.annotations.Immutable;
+
+import jakarta.persistence.Id;
+
+@Entity
+@Immutable
+@Table(name = "printer_fleet_current")
+public class PrinterFleetCurrent {
+    @Id
+    @Column(name = "fleet_id")
+    private Long id;
+
+    @Column(name = "weighted_average_power_watts")
+    private Integer weightedAveragePowerWatts;
+
+    @Column(name = "fleet_max_build_x_mm")
+    private Integer fleetMaxBuildXMm;
+
+    @Column(name = "fleet_max_build_y_mm")
+    private Integer fleetMaxBuildYMm;
+
+    @Column(name = "fleet_max_build_z_mm")
+    private Integer fleetMaxBuildZMm;
+
+    public Integer getWeightedAveragePowerWatts() {
+        return weightedAveragePowerWatts;
+    }
+
+    public Integer getFleetMaxBuildXMm() {
+        return fleetMaxBuildXMm;
+    }
+
+    public Integer getFleetMaxBuildYMm() {
+        return fleetMaxBuildYMm;
+    }
+
+    public Integer getFleetMaxBuildZMm() {
+        return fleetMaxBuildZMm;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/PrinterMachine.java

@@ -0,0 +1,116 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+
+@Entity
+@Table(name = "printer_machine")
+public class PrinterMachine {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "printer_machine_id", nullable = false)
+    private Long id;
+
+    @Column(name = "printer_display_name", nullable = false, length = Integer.MAX_VALUE)
+    private String printerDisplayName;
+
+    @Column(name = "build_volume_x_mm", nullable = false)
+    private Integer buildVolumeXMm;
+
+    @Column(name = "build_volume_y_mm", nullable = false)
+    private Integer buildVolumeYMm;
+
+    @Column(name = "build_volume_z_mm", nullable = false)
+    private Integer buildVolumeZMm;
+
+    @Column(name = "power_watts", nullable = false)
+    private Integer powerWatts;
+
+    @ColumnDefault("1.000")
+    @Column(name = "fleet_weight", nullable = false, precision = 6, scale = 3)
+    private BigDecimal fleetWeight;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getPrinterDisplayName() {
+        return printerDisplayName;
+    }
+
+    public void setPrinterDisplayName(String printerDisplayName) {
+        this.printerDisplayName = printerDisplayName;
+    }
+
+    public Integer getBuildVolumeXMm() {
+        return buildVolumeXMm;
+    }
+
+    public void setBuildVolumeXMm(Integer buildVolumeXMm) {
+        this.buildVolumeXMm = buildVolumeXMm;
+    }
+
+    public Integer getBuildVolumeYMm() {
+        return buildVolumeYMm;
+    }
+
+    public void setBuildVolumeYMm(Integer buildVolumeYMm) {
+        this.buildVolumeYMm = buildVolumeYMm;
+    }
+
+    public Integer getBuildVolumeZMm() {
+        return buildVolumeZMm;
+    }
+
+    public void setBuildVolumeZMm(Integer buildVolumeZMm) {
+        this.buildVolumeZMm = buildVolumeZMm;
+    }
+
+    public Integer getPowerWatts() {
+        return powerWatts;
+    }
+
+    public void setPowerWatts(Integer powerWatts) {
+        this.powerWatts = powerWatts;
+    }
+
+    public BigDecimal getFleetWeight() {
+        return fleetWeight;
+    }
+
+    public void setFleetWeight(BigDecimal fleetWeight) {
+        this.fleetWeight = fleetWeight;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/PrinterMachineProfile.java

@@ -0,0 +1,85 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+
+@Entity
+@Table(name = "printer_machine_profile", uniqueConstraints = {
+        @UniqueConstraint(name = "ux_printer_machine_profile_machine_nozzle", columnNames = {
+                "printer_machine_id", "nozzle_diameter_mm"
+        })
+})
+public class PrinterMachineProfile {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "printer_machine_profile_id", nullable = false)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "printer_machine_id", nullable = false)
+    private PrinterMachine printerMachine;
+
+    @Column(name = "nozzle_diameter_mm", nullable = false, precision = 4, scale = 2)
+    private BigDecimal nozzleDiameterMm;
+
+    @Column(name = "orca_machine_profile_name", nullable = false, length = Integer.MAX_VALUE)
+    private String orcaMachineProfileName;
+
+    @ColumnDefault("false")
+    @Column(name = "is_default", nullable = false)
+    private Boolean isDefault;
+
+    @ColumnDefault("true")
+    @Column(name = "is_active", nullable = false)
+    private Boolean isActive;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public PrinterMachine getPrinterMachine() {
+        return printerMachine;
+    }
+
+    public void setPrinterMachine(PrinterMachine printerMachine) {
+        this.printerMachine = printerMachine;
+    }
+
+    public BigDecimal getNozzleDiameterMm() {
+        return nozzleDiameterMm;
+    }
+
+    public void setNozzleDiameterMm(BigDecimal nozzleDiameterMm) {
+        this.nozzleDiameterMm = nozzleDiameterMm;
+    }
+
+    public String getOrcaMachineProfileName() {
+        return orcaMachineProfileName;
+    }
+
+    public void setOrcaMachineProfileName(String orcaMachineProfileName) {
+        this.orcaMachineProfileName = orcaMachineProfileName;
+    }
+
+    public Boolean getIsDefault() {
+        return isDefault;
+    }
+
+    public void setIsDefault(Boolean isDefault) {
+        this.isDefault = isDefault;
+    }
+
+    public Boolean getIsActive() {
+        return isActive;
+    }
+
+    public void setIsActive(Boolean isActive) {
+        this.isActive = isActive;
+    }
+}

backend/src/main/java/com/printcalculator/entity/QuoteLineItem.java

@@ -0,0 +1,228 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.JdbcTypeCode;
+import org.hibernate.annotations.OnDelete;
+import org.hibernate.annotations.OnDeleteAction;
+import org.hibernate.type.SqlTypes;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.Map;
+import java.util.UUID;
+
+@Entity
+@Table(name = "quote_line_items", indexes = {@Index(name = "ix_quote_line_items_session",
+        columnList = "quote_session_id")})
+public class QuoteLineItem {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "quote_line_item_id", nullable = false)
+    private UUID id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @OnDelete(action = OnDeleteAction.CASCADE)
+    @JoinColumn(name = "quote_session_id", nullable = false)
+    @com.fasterxml.jackson.annotation.JsonIgnore
+    private QuoteSession quoteSession;
+
+    @Column(name = "status", nullable = false, length = Integer.MAX_VALUE)
+    private String status;
+
+    @Column(name = "original_filename", nullable = false, length = Integer.MAX_VALUE)
+    private String originalFilename;
+
+    @ColumnDefault("1")
+    @Column(name = "quantity", nullable = false)
+    private Integer quantity;
+
+    @Column(name = "color_code", length = Integer.MAX_VALUE)
+    private String colorCode;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "filament_variant_id")
+    @com.fasterxml.jackson.annotation.JsonIgnore
+    private FilamentVariant filamentVariant;
+
+    @Column(name = "bounding_box_x_mm", precision = 10, scale = 3)
+    private BigDecimal boundingBoxXMm;
+
+    @Column(name = "bounding_box_y_mm", precision = 10, scale = 3)
+    private BigDecimal boundingBoxYMm;
+
+    @Column(name = "bounding_box_z_mm", precision = 10, scale = 3)
+    private BigDecimal boundingBoxZMm;
+
+    @Column(name = "print_time_seconds")
+    private Integer printTimeSeconds;
+
+    @Column(name = "material_grams", precision = 12, scale = 2)
+    private BigDecimal materialGrams;
+
+    @Column(name = "unit_price_chf", precision = 12, scale = 2)
+    private BigDecimal unitPriceChf;
+
+    @JdbcTypeCode(SqlTypes.JSON)
+    @Column(name = "pricing_breakdown")
+    private Map<String, Object> pricingBreakdown;
+
+    @Column(name = "error_message", length = Integer.MAX_VALUE)
+    private String errorMessage;
+
+    @Column(name = "stored_path", length = Integer.MAX_VALUE)
+    private String storedPath;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    @ColumnDefault("now()")
+    @Column(name = "updated_at", nullable = false)
+    private OffsetDateTime updatedAt;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public QuoteSession getQuoteSession() {
+        return quoteSession;
+    }
+
+    public void setQuoteSession(QuoteSession quoteSession) {
+        this.quoteSession = quoteSession;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public String getOriginalFilename() {
+        return originalFilename;
+    }
+
+    public void setOriginalFilename(String originalFilename) {
+        this.originalFilename = originalFilename;
+    }
+
+    public Integer getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(Integer quantity) {
+        this.quantity = quantity;
+    }
+
+    public String getColorCode() {
+        return colorCode;
+    }
+
+    public void setColorCode(String colorCode) {
+        this.colorCode = colorCode;
+    }
+
+    public FilamentVariant getFilamentVariant() {
+        return filamentVariant;
+    }
+
+    public void setFilamentVariant(FilamentVariant filamentVariant) {
+        this.filamentVariant = filamentVariant;
+    }
+
+    public BigDecimal getBoundingBoxXMm() {
+        return boundingBoxXMm;
+    }
+
+    public void setBoundingBoxXMm(BigDecimal boundingBoxXMm) {
+        this.boundingBoxXMm = boundingBoxXMm;
+    }
+
+    public BigDecimal getBoundingBoxYMm() {
+        return boundingBoxYMm;
+    }
+
+    public void setBoundingBoxYMm(BigDecimal boundingBoxYMm) {
+        this.boundingBoxYMm = boundingBoxYMm;
+    }
+
+    public BigDecimal getBoundingBoxZMm() {
+        return boundingBoxZMm;
+    }
+
+    public void setBoundingBoxZMm(BigDecimal boundingBoxZMm) {
+        this.boundingBoxZMm = boundingBoxZMm;
+    }
+
+    public Integer getPrintTimeSeconds() {
+        return printTimeSeconds;
+    }
+
+    public void setPrintTimeSeconds(Integer printTimeSeconds) {
+        this.printTimeSeconds = printTimeSeconds;
+    }
+
+    public BigDecimal getMaterialGrams() {
+        return materialGrams;
+    }
+
+    public void setMaterialGrams(BigDecimal materialGrams) {
+        this.materialGrams = materialGrams;
+    }
+
+    public BigDecimal getUnitPriceChf() {
+        return unitPriceChf;
+    }
+
+    public void setUnitPriceChf(BigDecimal unitPriceChf) {
+        this.unitPriceChf = unitPriceChf;
+    }
+
+    public Map<String, Object> getPricingBreakdown() {
+        return pricingBreakdown;
+    }
+
+    public void setPricingBreakdown(Map<String, Object> pricingBreakdown) {
+        this.pricingBreakdown = pricingBreakdown;
+    }
+
+    public String getErrorMessage() {
+        return errorMessage;
+    }
+
+    public void setErrorMessage(String errorMessage) {
+        this.errorMessage = errorMessage;
+    }
+
+    public String getStoredPath() {
+        return storedPath;
+    }
+
+    public void setStoredPath(String storedPath) {
+        this.storedPath = storedPath;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(OffsetDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
+}

backend/src/main/java/com/printcalculator/entity/QuoteSession.java

@@ -0,0 +1,176 @@
+package com.printcalculator.entity;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.ColumnDefault;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "quote_sessions", indexes = {
+        @Index(name = "ix_quote_sessions_status",
+                columnList = "status"),
+        @Index(name = "ix_quote_sessions_expires_at",
+                columnList = "expires_at")})
+public class QuoteSession {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "quote_session_id", nullable = false)
+    private UUID id;
+
+    @Column(name = "status", nullable = false, length = Integer.MAX_VALUE)
+    private String status;
+
+    @Column(name = "pricing_version", nullable = false, length = Integer.MAX_VALUE)
+    private String pricingVersion;
+
+    @Column(name = "material_code", nullable = false, length = Integer.MAX_VALUE)
+    private String materialCode;
+
+    @Column(name = "nozzle_diameter_mm", precision = 5, scale = 2)
+    private BigDecimal nozzleDiameterMm;
+
+    @Column(name = "layer_height_mm", precision = 6, scale = 3)
+    private BigDecimal layerHeightMm;
+
+    @Column(name = "infill_pattern", length = Integer.MAX_VALUE)
+    private String infillPattern;
+
+    @Column(name = "infill_percent")
+    private Integer infillPercent;
+
+    @ColumnDefault("false")
+    @Column(name = "supports_enabled", nullable = false)
+    private Boolean supportsEnabled;
+
+    @Column(name = "notes", length = Integer.MAX_VALUE)
+    private String notes;
+
+    @ColumnDefault("0.00")
+    @Column(name = "setup_cost_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal setupCostChf;
+
+    @ColumnDefault("now()")
+    @Column(name = "created_at", nullable = false)
+    private OffsetDateTime createdAt;
+
+    @Column(name = "expires_at", nullable = false)
+    private OffsetDateTime expiresAt;
+
+    @Column(name = "converted_order_id")
+    private UUID convertedOrderId;
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public String getPricingVersion() {
+        return pricingVersion;
+    }
+
+    public void setPricingVersion(String pricingVersion) {
+        this.pricingVersion = pricingVersion;
+    }
+
+    public String getMaterialCode() {
+        return materialCode;
+    }
+
+    public void setMaterialCode(String materialCode) {
+        this.materialCode = materialCode;
+    }
+
+    public BigDecimal getNozzleDiameterMm() {
+        return nozzleDiameterMm;
+    }
+
+    public void setNozzleDiameterMm(BigDecimal nozzleDiameterMm) {
+        this.nozzleDiameterMm = nozzleDiameterMm;
+    }
+
+    public BigDecimal getLayerHeightMm() {
+        return layerHeightMm;
+    }
+
+    public void setLayerHeightMm(BigDecimal layerHeightMm) {
+        this.layerHeightMm = layerHeightMm;
+    }
+
+    public String getInfillPattern() {
+        return infillPattern;
+    }
+
+    public void setInfillPattern(String infillPattern) {
+        this.infillPattern = infillPattern;
+    }
+
+    public Integer getInfillPercent() {
+        return infillPercent;
+    }
+
+    public void setInfillPercent(Integer infillPercent) {
+        this.infillPercent = infillPercent;
+    }
+
+    public Boolean getSupportsEnabled() {
+        return supportsEnabled;
+    }
+
+    public void setSupportsEnabled(Boolean supportsEnabled) {
+        this.supportsEnabled = supportsEnabled;
+    }
+
+    public String getNotes() {
+        return notes;
+    }
+
+    public void setNotes(String notes) {
+        this.notes = notes;
+    }
+
+    public BigDecimal getSetupCostChf() {
+        return setupCostChf;
+    }
+
+    public void setSetupCostChf(BigDecimal setupCostChf) {
+        this.setupCostChf = setupCostChf;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public OffsetDateTime getExpiresAt() {
+        return expiresAt;
+    }
+
+    public void setExpiresAt(OffsetDateTime expiresAt) {
+        this.expiresAt = expiresAt;
+    }
+
+    public UUID getConvertedOrderId() {
+        return convertedOrderId;
+    }
+
+    public void setConvertedOrderId(UUID convertedOrderId) {
+        this.convertedOrderId = convertedOrderId;
+    }
+
+}

backend/src/main/java/com/printcalculator/event/OrderCreatedEvent.java

@@ -0,0 +1,16 @@
+package com.printcalculator.event;
+
+import com.printcalculator.entity.Order;
+import lombok.Getter;
+import org.springframework.context.ApplicationEvent;
+
+@Getter
+public class OrderCreatedEvent extends ApplicationEvent {
+
+    private final Order order;
+
+    public OrderCreatedEvent(Object source, Order order) {
+        super(source);
+        this.order = order;
+    }
+}

backend/src/main/java/com/printcalculator/event/PaymentConfirmedEvent.java

@@ -0,0 +1,24 @@
+package com.printcalculator.event;
+
+import com.printcalculator.entity.Order;
+import com.printcalculator.entity.Payment;
+import org.springframework.context.ApplicationEvent;
+
+public class PaymentConfirmedEvent extends ApplicationEvent {
+    private final Order order;
+    private final Payment payment;
+
+    public PaymentConfirmedEvent(Object source, Order order, Payment payment) {
+        super(source);
+        this.order = order;
+        this.payment = payment;
+    }
+
+    public Order getOrder() {
+        return order;
+    }
+
+    public Payment getPayment() {
+        return payment;
+    }
+}

backend/src/main/java/com/printcalculator/event/PaymentReportedEvent.java

@@ -0,0 +1,25 @@
+package com.printcalculator.event;
+
+import com.printcalculator.entity.Order;
+import com.printcalculator.entity.Payment;
+import org.springframework.context.ApplicationEvent;
+
+public class PaymentReportedEvent extends ApplicationEvent {
+
+    private final Order order;
+    private final Payment payment;
+
+    public PaymentReportedEvent(Object source, Order order, Payment payment) {
+        super(source);
+        this.order = order;
+        this.payment = payment;
+    }
+
+    public Order getOrder() {
+        return order;
+    }
+
+    public Payment getPayment() {
+        return payment;
+    }
+}

backend/src/main/java/com/printcalculator/event/listener/OrderEmailListener.java

@@ -0,0 +1,496 @@
+package com.printcalculator.event.listener;
+
+import com.printcalculator.entity.Order;
+import com.printcalculator.entity.OrderItem;
+import com.printcalculator.entity.Payment;
+import com.printcalculator.event.OrderCreatedEvent;
+import com.printcalculator.event.PaymentConfirmedEvent;
+import com.printcalculator.event.PaymentReportedEvent;
+import com.printcalculator.repository.OrderItemRepository;
+import com.printcalculator.service.InvoicePdfRenderingService;
+import com.printcalculator.service.QrBillService;
+import com.printcalculator.service.StorageService;
+import com.printcalculator.service.email.EmailNotificationService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.event.EventListener;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.text.NumberFormat;
+import java.time.Year;
+import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
+import java.util.Currency;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.nio.file.Paths;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class OrderEmailListener {
+
+    private static final String DEFAULT_LANGUAGE = "it";
+
+    private final EmailNotificationService emailNotificationService;
+    private final InvoicePdfRenderingService invoicePdfRenderingService;
+    private final OrderItemRepository orderItemRepository;
+    private final QrBillService qrBillService;
+    private final StorageService storageService;
+
+    @Value("${app.mail.admin.enabled:true}")
+    private boolean adminMailEnabled;
+
+    @Value("${app.mail.admin.address:}")
+    private String adminMailAddress;
+
+    @Value("${app.frontend.base-url:http://localhost:4200}")
+    private String frontendBaseUrl;
+
+    @Async
+    @EventListener
+    public void handleOrderCreatedEvent(OrderCreatedEvent event) {
+        Order order = event.getOrder();
+        log.info("Processing OrderCreatedEvent for order id: {}", order.getId());
+
+        try {
+            sendCustomerConfirmationEmail(order);
+
+            if (adminMailEnabled && adminMailAddress != null && !adminMailAddress.isEmpty()) {
+                sendAdminNotificationEmail(order);
+            }
+        } catch (Exception e) {
+            log.error("Failed to process email notifications for order id: {}", order.getId(), e);
+        }
+    }
+
+    @Async
+    @EventListener
+    public void handlePaymentReportedEvent(PaymentReportedEvent event) {
+        Order order = event.getOrder();
+        log.info("Processing PaymentReportedEvent for order id: {}", order.getId());
+
+        try {
+            sendPaymentReportedEmail(order);
+        } catch (Exception e) {
+            log.error("Failed to send payment reported email for order id: {}", order.getId(), e);
+        }
+    }
+
+    @Async
+    @EventListener
+    public void handlePaymentConfirmedEvent(PaymentConfirmedEvent event) {
+        Order order = event.getOrder();
+        Payment payment = event.getPayment();
+        log.info("Processing PaymentConfirmedEvent for order id: {}", order.getId());
+
+        try {
+            sendPaidInvoiceEmail(order, payment);
+        } catch (Exception e) {
+            log.error("Failed to send paid invoice email for order id: {}", order.getId(), e);
+        }
+    }
+
+    private void sendCustomerConfirmationEmail(Order order) {
+        String language = resolveLanguage(order.getPreferredLanguage());
+        String orderNumber = getDisplayOrderNumber(order);
+
+        Map<String, Object> templateData = buildBaseTemplateData(order, language);
+        String subject = applyOrderConfirmationTexts(templateData, language, orderNumber);
+        byte[] confirmationPdf = loadOrGenerateConfirmationPdf(order);
+
+        emailNotificationService.sendEmailWithAttachment(
+                order.getCustomer().getEmail(),
+                subject,
+                "order-confirmation",
+                templateData,
+                buildConfirmationAttachmentName(language, orderNumber),
+                confirmationPdf
+        );
+    }
+
+    private void sendPaymentReportedEmail(Order order) {
+        String language = resolveLanguage(order.getPreferredLanguage());
+        String orderNumber = getDisplayOrderNumber(order);
+
+        Map<String, Object> templateData = buildBaseTemplateData(order, language);
+        String subject = applyPaymentReportedTexts(templateData, language, orderNumber);
+
+        emailNotificationService.sendEmail(
+                order.getCustomer().getEmail(),
+                subject,
+                "payment-reported",
+                templateData
+        );
+    }
+
+    private void sendPaidInvoiceEmail(Order order, Payment payment) {
+        String language = resolveLanguage(order.getPreferredLanguage());
+        String orderNumber = getDisplayOrderNumber(order);
+
+        Map<String, Object> templateData = buildBaseTemplateData(order, language);
+        String subject = applyPaymentConfirmedTexts(templateData, language, orderNumber);
+
+        byte[] pdf = null;
+        try {
+            List<OrderItem> items = orderItemRepository.findByOrder_Id(order.getId());
+            pdf = invoicePdfRenderingService.generateDocumentPdf(order, items, false, qrBillService, payment);
+        } catch (Exception e) {
+            log.error("Failed to generate PDF for paid invoice email: {}", e.getMessage(), e);
+        }
+
+        emailNotificationService.sendEmailWithAttachment(
+                order.getCustomer().getEmail(),
+                subject,
+                "payment-confirmed",
+                templateData,
+                buildPaidInvoiceAttachmentName(language, orderNumber),
+                pdf
+        );
+    }
+
+    private void sendAdminNotificationEmail(Order order) {
+        String orderNumber = getDisplayOrderNumber(order);
+        Map<String, Object> templateData = buildBaseTemplateData(order, DEFAULT_LANGUAGE);
+        templateData.put("customerName", buildCustomerFullName(order));
+
+        templateData.put("emailTitle", "Nuovo ordine ricevuto");
+        templateData.put("headlineText", "Nuovo ordine #" + orderNumber);
+        templateData.put("greetingText", "Ciao team,");
+        templateData.put("introText", "Un nuovo ordine e' stato creato dal cliente.");
+        templateData.put("detailsTitleText", "Dettagli ordine");
+        templateData.put("labelOrderNumber", "Numero ordine");
+        templateData.put("labelDate", "Data");
+        templateData.put("labelTotal", "Totale");
+        templateData.put("orderDetailsCtaText", "Apri dettaglio ordine");
+        templateData.put("attachmentHintText", "La conferma cliente e il QR bill sono stati salvati nella cartella documenti dell'ordine.");
+        templateData.put("supportText", "Controlla i dettagli e procedi con la gestione operativa.");
+        templateData.put("footerText", "Notifica automatica sistema ordini.");
+
+        emailNotificationService.sendEmail(
+                adminMailAddress,
+                "Nuovo Ordine Ricevuto #" + orderNumber + " - " + buildCustomerFullName(order),
+                "order-confirmation",
+                templateData
+        );
+    }
+
+    private Map<String, Object> buildBaseTemplateData(Order order, String language) {
+        Locale locale = localeForLanguage(language);
+        NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance(locale);
+        currencyFormatter.setCurrency(Currency.getInstance("CHF"));
+
+        Map<String, Object> templateData = new HashMap<>();
+        templateData.put("customerName", buildCustomerFirstName(order, language));
+        templateData.put("orderId", order.getId());
+        templateData.put("orderNumber", getDisplayOrderNumber(order));
+        templateData.put("orderDetailsUrl", buildOrderDetailsUrl(order, language));
+        templateData.put(
+                "orderDate",
+                order.getCreatedAt().format(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM).withLocale(locale))
+        );
+        templateData.put("totalCost", currencyFormatter.format(order.getTotalChf()));
+        templateData.put("currentYear", Year.now().getValue());
+        return templateData;
+    }
+
+    private String applyOrderConfirmationTexts(Map<String, Object> templateData, String language, String orderNumber) {
+        return switch (language) {
+            case "en" -> {
+                templateData.put("emailTitle", "Order Confirmation");
+                templateData.put("headlineText", "Thank you for your order #" + orderNumber);
+                templateData.put("greetingText", "Hi " + templateData.get("customerName") + ",");
+                templateData.put("introText", "We received your order and started processing it.");
+                templateData.put("detailsTitleText", "Order details");
+                templateData.put("labelOrderNumber", "Order number");
+                templateData.put("labelDate", "Date");
+                templateData.put("labelTotal", "Total");
+                templateData.put("orderDetailsCtaText", "View order status");
+                templateData.put("attachmentHintText", "Attached you can find the order confirmation PDF with the QR bill.");
+                templateData.put("supportText", "If you have questions, reply to this email and we will help you.");
+                templateData.put("footerText", "Automated message from 3D-Fab.");
+                yield "Order Confirmation #" + orderNumber + " - 3D-Fab";
+            }
+            case "de" -> {
+                templateData.put("emailTitle", "Bestellbestaetigung");
+                templateData.put("headlineText", "Danke fuer Ihre Bestellung #" + orderNumber);
+                templateData.put("greetingText", "Hallo " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Wir haben Ihre Bestellung erhalten und mit der Bearbeitung begonnen.");
+                templateData.put("detailsTitleText", "Bestelldetails");
+                templateData.put("labelOrderNumber", "Bestellnummer");
+                templateData.put("labelDate", "Datum");
+                templateData.put("labelTotal", "Gesamtbetrag");
+                templateData.put("orderDetailsCtaText", "Bestellstatus ansehen");
+                templateData.put("attachmentHintText", "Im Anhang finden Sie die Bestellbestaetigung mit QR-Rechnung.");
+                templateData.put("supportText", "Bei Fragen antworten Sie einfach auf diese E-Mail.");
+                templateData.put("footerText", "Automatische Nachricht von 3D-Fab.");
+                yield "Bestellbestaetigung #" + orderNumber + " - 3D-Fab";
+            }
+            case "fr" -> {
+                templateData.put("emailTitle", "Confirmation de commande");
+                templateData.put("headlineText", "Merci pour votre commande #" + orderNumber);
+                templateData.put("greetingText", "Bonjour " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Nous avons recu votre commande et commence son traitement.");
+                templateData.put("detailsTitleText", "Details de commande");
+                templateData.put("labelOrderNumber", "Numero de commande");
+                templateData.put("labelDate", "Date");
+                templateData.put("labelTotal", "Total");
+                templateData.put("orderDetailsCtaText", "Voir le statut de la commande");
+                templateData.put("attachmentHintText", "Vous trouverez en piece jointe la confirmation de commande avec la facture QR.");
+                templateData.put("supportText", "Si vous avez des questions, repondez a cet email.");
+                templateData.put("footerText", "Message automatique de 3D-Fab.");
+                yield "Confirmation de commande #" + orderNumber + " - 3D-Fab";
+            }
+            default -> {
+                templateData.put("emailTitle", "Conferma ordine");
+                templateData.put("headlineText", "Grazie per il tuo ordine #" + orderNumber);
+                templateData.put("greetingText", "Ciao " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Abbiamo ricevuto il tuo ordine e iniziato l'elaborazione.");
+                templateData.put("detailsTitleText", "Dettagli ordine");
+                templateData.put("labelOrderNumber", "Numero ordine");
+                templateData.put("labelDate", "Data");
+                templateData.put("labelTotal", "Totale");
+                templateData.put("orderDetailsCtaText", "Visualizza stato ordine");
+                templateData.put("attachmentHintText", "In allegato trovi la conferma ordine in PDF con QR bill.");
+                templateData.put("supportText", "Se hai domande, rispondi a questa email e ti aiutiamo subito.");
+                templateData.put("footerText", "Messaggio automatico di 3D-Fab.");
+                yield "Conferma Ordine #" + orderNumber + " - 3D-Fab";
+            }
+        };
+    }
+
+    private String applyPaymentReportedTexts(Map<String, Object> templateData, String language, String orderNumber) {
+        return switch (language) {
+            case "en" -> {
+                templateData.put("emailTitle", "Payment Reported");
+                templateData.put("headlineText", "Payment reported for order #" + orderNumber);
+                templateData.put("greetingText", "Hi " + templateData.get("customerName") + ",");
+                templateData.put("introText", "We received your payment report and our team is now verifying it.");
+                templateData.put("statusText", "Current status: Payment under verification.");
+                templateData.put("orderDetailsCtaText", "Check order status");
+                templateData.put("supportText", "You will receive another email as soon as the payment is confirmed.");
+                templateData.put("footerText", "Automated message from 3D-Fab.");
+                templateData.put("labelOrderNumber", "Order number");
+                templateData.put("labelTotal", "Total");
+                yield "We are verifying your payment (Order #" + orderNumber + ")";
+            }
+            case "de" -> {
+                templateData.put("emailTitle", "Zahlung gemeldet");
+                templateData.put("headlineText", "Zahlung fuer Bestellung #" + orderNumber + " gemeldet");
+                templateData.put("greetingText", "Hallo " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Wir haben Ihre Zahlungsmitteilung erhalten und pruefen sie aktuell.");
+                templateData.put("statusText", "Aktueller Status: Zahlung in Pruefung.");
+                templateData.put("orderDetailsCtaText", "Bestellstatus ansehen");
+                templateData.put("supportText", "Sobald die Zahlung bestaetigt ist, erhalten Sie eine weitere E-Mail.");
+                templateData.put("footerText", "Automatische Nachricht von 3D-Fab.");
+                templateData.put("labelOrderNumber", "Bestellnummer");
+                templateData.put("labelTotal", "Gesamtbetrag");
+                yield "Wir pruefen Ihre Zahlung (Bestellung #" + orderNumber + ")";
+            }
+            case "fr" -> {
+                templateData.put("emailTitle", "Paiement signale");
+                templateData.put("headlineText", "Paiement signale pour la commande #" + orderNumber);
+                templateData.put("greetingText", "Bonjour " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Nous avons recu votre signalement de paiement et nous le verifions.");
+                templateData.put("statusText", "Statut actuel: Paiement en verification.");
+                templateData.put("orderDetailsCtaText", "Consulter le statut de la commande");
+                templateData.put("supportText", "Vous recevrez un nouvel email des que le paiement sera confirme.");
+                templateData.put("footerText", "Message automatique de 3D-Fab.");
+                templateData.put("labelOrderNumber", "Numero de commande");
+                templateData.put("labelTotal", "Total");
+                yield "Nous verifions votre paiement (Commande #" + orderNumber + ")";
+            }
+            default -> {
+                templateData.put("emailTitle", "Pagamento segnalato");
+                templateData.put("headlineText", "Pagamento segnalato per ordine #" + orderNumber);
+                templateData.put("greetingText", "Ciao " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Abbiamo ricevuto la tua segnalazione di pagamento e la stiamo verificando.");
+                templateData.put("statusText", "Stato attuale: pagamento in verifica.");
+                templateData.put("orderDetailsCtaText", "Controlla lo stato ordine");
+                templateData.put("supportText", "Riceverai una nuova email non appena il pagamento sara' confermato.");
+                templateData.put("footerText", "Messaggio automatico di 3D-Fab.");
+                templateData.put("labelOrderNumber", "Numero ordine");
+                templateData.put("labelTotal", "Totale");
+                yield "Stiamo verificando il tuo pagamento (Ordine #" + orderNumber + ")";
+            }
+        };
+    }
+
+    private String applyPaymentConfirmedTexts(Map<String, Object> templateData, String language, String orderNumber) {
+        return switch (language) {
+            case "en" -> {
+                templateData.put("emailTitle", "Payment Confirmed");
+                templateData.put("headlineText", "Payment confirmed for order #" + orderNumber);
+                templateData.put("greetingText", "Hi " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Your payment has been confirmed and the order moved into production.");
+                templateData.put("statusText", "Current status: In production.");
+                templateData.put("attachmentHintText", "The paid invoice PDF is attached to this email.");
+                templateData.put("orderDetailsCtaText", "View order status");
+                templateData.put("supportText", "We will notify you again when the shipment is ready.");
+                templateData.put("footerText", "Automated message from 3D-Fab.");
+                templateData.put("labelOrderNumber", "Order number");
+                templateData.put("labelTotal", "Total");
+                yield "Payment confirmed (Order #" + orderNumber + ") - 3D-Fab";
+            }
+            case "de" -> {
+                templateData.put("emailTitle", "Zahlung bestaetigt");
+                templateData.put("headlineText", "Zahlung fuer Bestellung #" + orderNumber + " bestaetigt");
+                templateData.put("greetingText", "Hallo " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Ihre Zahlung wurde bestaetigt und die Bestellung ist jetzt in Produktion.");
+                templateData.put("statusText", "Aktueller Status: In Produktion.");
+                templateData.put("attachmentHintText", "Die bezahlte Rechnung als PDF ist dieser E-Mail beigefuegt.");
+                templateData.put("orderDetailsCtaText", "Bestellstatus ansehen");
+                templateData.put("supportText", "Wir informieren Sie erneut, sobald der Versand bereit ist.");
+                templateData.put("footerText", "Automatische Nachricht von 3D-Fab.");
+                templateData.put("labelOrderNumber", "Bestellnummer");
+                templateData.put("labelTotal", "Gesamtbetrag");
+                yield "Zahlung bestaetigt (Bestellung #" + orderNumber + ") - 3D-Fab";
+            }
+            case "fr" -> {
+                templateData.put("emailTitle", "Paiement confirme");
+                templateData.put("headlineText", "Paiement confirme pour la commande #" + orderNumber);
+                templateData.put("greetingText", "Bonjour " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Votre paiement est confirme et la commande est passe en production.");
+                templateData.put("statusText", "Statut actuel: En production.");
+                templateData.put("attachmentHintText", "La facture payee en PDF est jointe a cet email.");
+                templateData.put("orderDetailsCtaText", "Voir le statut de la commande");
+                templateData.put("supportText", "Nous vous informerons a nouveau des que l'expedition sera prete.");
+                templateData.put("footerText", "Message automatique de 3D-Fab.");
+                templateData.put("labelOrderNumber", "Numero de commande");
+                templateData.put("labelTotal", "Total");
+                yield "Paiement confirme (Commande #" + orderNumber + ") - 3D-Fab";
+            }
+            default -> {
+                templateData.put("emailTitle", "Pagamento confermato");
+                templateData.put("headlineText", "Pagamento confermato per ordine #" + orderNumber);
+                templateData.put("greetingText", "Ciao " + templateData.get("customerName") + ",");
+                templateData.put("introText", "Il tuo pagamento e' stato confermato e l'ordine e' entrato in produzione.");
+                templateData.put("statusText", "Stato attuale: in produzione.");
+                templateData.put("attachmentHintText", "In allegato trovi la fattura saldata in PDF.");
+                templateData.put("orderDetailsCtaText", "Visualizza stato ordine");
+                templateData.put("supportText", "Ti aggiorneremo di nuovo quando la spedizione sara' pronta.");
+                templateData.put("footerText", "Messaggio automatico di 3D-Fab.");
+                templateData.put("labelOrderNumber", "Numero ordine");
+                templateData.put("labelTotal", "Totale");
+                yield "Pagamento confermato (Ordine #" + orderNumber + ") - 3D-Fab";
+            }
+        };
+    }
+
+    private String getDisplayOrderNumber(Order order) {
+        String orderNumber = order.getOrderNumber();
+        if (orderNumber != null && !orderNumber.isBlank()) {
+            return orderNumber;
+        }
+        return order.getId() != null ? order.getId().toString() : "unknown";
+    }
+
+    private String buildOrderDetailsUrl(Order order, String language) {
+        String baseUrl = frontendBaseUrl == null ? "" : frontendBaseUrl.replaceAll("/+$", "");
+        return baseUrl + "/" + language + "/co/" + order.getId();
+    }
+
+    private String buildConfirmationAttachmentName(String language, String orderNumber) {
+        return switch (language) {
+            case "en" -> "Order-Confirmation-" + orderNumber + ".pdf";
+            case "de" -> "Bestellbestaetigung-" + orderNumber + ".pdf";
+            case "fr" -> "Confirmation-Commande-" + orderNumber + ".pdf";
+            default -> "Conferma-Ordine-" + orderNumber + ".pdf";
+        };
+    }
+
+    private String buildPaidInvoiceAttachmentName(String language, String orderNumber) {
+        return switch (language) {
+            case "en" -> "Paid-Invoice-" + orderNumber + ".pdf";
+            case "de" -> "Bezahlte-Rechnung-" + orderNumber + ".pdf";
+            case "fr" -> "Facture-Payee-" + orderNumber + ".pdf";
+            default -> "Fattura-Pagata-" + orderNumber + ".pdf";
+        };
+    }
+
+    private byte[] loadOrGenerateConfirmationPdf(Order order) {
+        byte[] stored = loadStoredConfirmationPdf(order);
+        if (stored != null) {
+            return stored;
+        }
+
+        try {
+            List<OrderItem> items = orderItemRepository.findByOrder_Id(order.getId());
+            return invoicePdfRenderingService.generateDocumentPdf(order, items, true, qrBillService, null);
+        } catch (Exception e) {
+            log.error("Failed to generate fallback confirmation PDF for order id: {}", order.getId(), e);
+            return null;
+        }
+    }
+
+    private byte[] loadStoredConfirmationPdf(Order order) {
+        String relativePath = buildConfirmationPdfRelativePath(order);
+        try {
+            return storageService.loadAsResource(Paths.get(relativePath)).getInputStream().readAllBytes();
+        } catch (Exception e) {
+            log.warn("Confirmation PDF not found for order id {} at {}", order.getId(), relativePath);
+            return null;
+        }
+    }
+
+    private String buildConfirmationPdfRelativePath(Order order) {
+        return "orders/" + order.getId() + "/documents/confirmation-" + getDisplayOrderNumber(order) + ".pdf";
+    }
+
+    private String buildCustomerFirstName(Order order, String language) {
+        if (order.getCustomer() != null && order.getCustomer().getFirstName() != null && !order.getCustomer().getFirstName().isBlank()) {
+            return order.getCustomer().getFirstName();
+        }
+        if (order.getBillingFirstName() != null && !order.getBillingFirstName().isBlank()) {
+            return order.getBillingFirstName();
+        }
+        return switch (language) {
+            case "en" -> "Customer";
+            case "de" -> "Kunde";
+            case "fr" -> "Client";
+            default -> "Cliente";
+        };
+    }
+
+    private String buildCustomerFullName(Order order) {
+        String firstName = order.getCustomer() != null ? order.getCustomer().getFirstName() : null;
+        String lastName = order.getCustomer() != null ? order.getCustomer().getLastName() : null;
+        if (firstName != null && !firstName.isBlank() && lastName != null && !lastName.isBlank()) {
+            return firstName + " " + lastName;
+        }
+        if (order.getBillingFirstName() != null && !order.getBillingFirstName().isBlank()
+                && order.getBillingLastName() != null && !order.getBillingLastName().isBlank()) {
+            return order.getBillingFirstName() + " " + order.getBillingLastName();
+        }
+        return "Cliente";
+    }
+
+    private Locale localeForLanguage(String language) {
+        return switch (language) {
+            case "en" -> Locale.ENGLISH;
+            case "de" -> Locale.GERMAN;
+            case "fr" -> Locale.FRENCH;
+            default -> Locale.ITALIAN;
+        };
+    }
+
+    private String resolveLanguage(String language) {
+        if (language == null || language.isBlank()) {
+            return DEFAULT_LANGUAGE;
+        }
+
+        String normalized = language.trim().toLowerCase(Locale.ROOT);
+        if (normalized.length() > 2) {
+            normalized = normalized.substring(0, 2);
+        }
+
+        return switch (normalized) {
+            case "it", "en", "de", "fr" -> normalized;
+            default -> DEFAULT_LANGUAGE;
+        };
+    }
+}

backend/src/main/java/com/printcalculator/exception/GlobalExceptionHandler.java

@@ -0,0 +1,61 @@
+package com.printcalculator.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.context.request.WebRequest;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+@ControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(VirusDetectedException.class)
+    public ResponseEntity<Object> handleVirusDetectedException(
+            VirusDetectedException ex, WebRequest request) {
+
+        Map<String, Object> body = new LinkedHashMap<>();
+        body.put("timestamp", LocalDateTime.now());
+        body.put("message", ex.getMessage());
+        body.put("error", "Virus Detected");
+
+        return new ResponseEntity<>(body, HttpStatus.BAD_REQUEST);
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<Object> handleValidationException(
+            MethodArgumentNotValidException ex, WebRequest request) {
+
+        List<String> details = new ArrayList<>();
+        for (FieldError fieldError : ex.getBindingResult().getFieldErrors()) {
+            details.add(fieldError.getField() + ": " + fieldError.getDefaultMessage());
+        }
+
+        Map<String, Object> body = new LinkedHashMap<>();
+        body.put("timestamp", LocalDateTime.now());
+        body.put("message", "Dati non validi.");
+        body.put("error", "Validation Error");
+        body.put("details", details);
+
+        return new ResponseEntity<>(body, HttpStatus.BAD_REQUEST);
+    }
+
+    @ExceptionHandler(IllegalArgumentException.class)
+    public ResponseEntity<Object> handleIllegalArgumentException(
+            IllegalArgumentException ex, WebRequest request) {
+
+        Map<String, Object> body = new LinkedHashMap<>();
+        body.put("timestamp", LocalDateTime.now());
+        body.put("message", ex.getMessage());
+        body.put("error", "Bad Request");
+
+        return new ResponseEntity<>(body, HttpStatus.BAD_REQUEST);
+    }
+}

backend/src/main/java/com/printcalculator/exception/StorageException.java

@@ -0,0 +1,12 @@
+package com.printcalculator.exception;
+
+public class StorageException extends RuntimeException {
+
+    public StorageException(String message) {
+        super(message);
+    }
+
+    public StorageException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

backend/src/main/java/com/printcalculator/exception/VirusDetectedException.java

@@ -0,0 +1,7 @@
+package com.printcalculator.exception;
+
+public class VirusDetectedException extends RuntimeException {
+    public VirusDetectedException(String message) {
+        super(message);
+    }
+}

backend/src/main/java/com/printcalculator/model/CostBreakdown.java

@@ -1,11 +0,0 @@
-package com.printcalculator.model;
-
-import java.math.BigDecimal;
-
-public record CostBreakdown(
-    BigDecimal materialCost,
-    BigDecimal machineCost,
-    BigDecimal energyCost,
-    BigDecimal subtotal,
-    BigDecimal markupAmount
-) {}

backend/src/main/java/com/printcalculator/model/ModelDimensions.java

@@ -0,0 +1,7 @@
+package com.printcalculator.model;
+
+public record ModelDimensions(
+        double xMm,
+        double yMm,
+        double zMm
+) {}

backend/src/main/java/com/printcalculator/model/QuoteResult.java

@@ -1,12 +1,24 @@
 package com.printcalculator.model;
 
-import java.math.BigDecimal;
-import java.util.List;
+public class QuoteResult {
+    private double totalPrice;
+    private String currency;
+    private PrintStats stats;
+    public QuoteResult(double totalPrice, String currency, PrintStats stats) {
+        this.totalPrice = totalPrice;
+        this.currency = currency;
+        this.stats = stats;
+    }
 
-public record QuoteResult(
-    BigDecimal totalPrice,
-    String currency,
-    PrintStats stats,
-    CostBreakdown breakdown,
-    List<String> notes
-) {}
+    public double getTotalPrice() {
+        return totalPrice;
+    }
+
+    public String getCurrency() {
+        return currency;
+    }
+
+    public PrintStats getStats() {
+        return stats;
+    }
+}

backend/src/main/java/com/printcalculator/repository/CustomQuoteRequestAttachmentRepository.java

@@ -0,0 +1,11 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.CustomQuoteRequestAttachment;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface CustomQuoteRequestAttachmentRepository extends JpaRepository<CustomQuoteRequestAttachment, UUID> {
+    List<CustomQuoteRequestAttachment> findByRequest_IdOrderByCreatedAtAsc(UUID requestId);
+}

backend/src/main/java/com/printcalculator/repository/CustomQuoteRequestRepository.java

@@ -0,0 +1,9 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.CustomQuoteRequest;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.UUID;
+
+public interface CustomQuoteRequestRepository extends JpaRepository<CustomQuoteRequest, UUID> {
+}

backend/src/main/java/com/printcalculator/repository/CustomerRepository.java

@@ -0,0 +1,11 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.Customer;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+import java.util.UUID;
+
+public interface CustomerRepository extends JpaRepository<Customer, UUID> {
+    Optional<Customer> findByEmail(String email);
+}

backend/src/main/java/com/printcalculator/repository/FilamentMaterialTypeRepository.java

@@ -0,0 +1,10 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.FilamentMaterialType;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface FilamentMaterialTypeRepository extends JpaRepository<FilamentMaterialType, Long> {
+    Optional<FilamentMaterialType> findByMaterialCode(String materialCode);
+}

backend/src/main/java/com/printcalculator/repository/FilamentVariantOrcaOverrideRepository.java

@@ -0,0 +1,15 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.entity.FilamentVariantOrcaOverride;
+import com.printcalculator.entity.PrinterMachineProfile;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface FilamentVariantOrcaOverrideRepository extends JpaRepository<FilamentVariantOrcaOverride, Long> {
+    Optional<FilamentVariantOrcaOverride> findByFilamentVariantAndPrinterMachineProfileAndIsActiveTrue(
+            FilamentVariant filamentVariant,
+            PrinterMachineProfile printerMachineProfile
+    );
+}

backend/src/main/java/com/printcalculator/repository/FilamentVariantRepository.java

@@ -0,0 +1,19 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.FilamentVariant;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.EntityGraph;
+
+import com.printcalculator.entity.FilamentMaterialType;
+import java.util.List;
+import java.util.Optional;
+
+public interface FilamentVariantRepository extends JpaRepository<FilamentVariant, Long> {
+    @EntityGraph(attributePaths = {"filamentMaterialType"})
+    List<FilamentVariant> findByIsActiveTrue();
+
+    // We try to match by color name if possible, or get first active
+    Optional<FilamentVariant> findByFilamentMaterialTypeAndColorName(FilamentMaterialType type, String colorName);
+    Optional<FilamentVariant> findByFilamentMaterialTypeAndVariantDisplayName(FilamentMaterialType type, String variantDisplayName);
+    Optional<FilamentVariant> findFirstByFilamentMaterialTypeAndIsActiveTrue(FilamentMaterialType type);
+}

backend/src/main/java/com/printcalculator/repository/FilamentVariantStockKgRepository.java

@@ -0,0 +1,7 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.FilamentVariantStockKg;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface FilamentVariantStockKgRepository extends JpaRepository<FilamentVariantStockKg, Long> {
+}

backend/src/main/java/com/printcalculator/repository/InfillPatternRepository.java

@@ -0,0 +1,7 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.InfillPattern;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface InfillPatternRepository extends JpaRepository<InfillPattern, Long> {
+}

backend/src/main/java/com/printcalculator/repository/LayerHeightOptionRepository.java

@@ -0,0 +1,7 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.LayerHeightOption;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface LayerHeightOptionRepository extends JpaRepository<LayerHeightOption, Long> {
+}

backend/src/main/java/com/printcalculator/repository/LayerHeightProfileRepository.java

@@ -0,0 +1,7 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.LayerHeightProfile;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface LayerHeightProfileRepository extends JpaRepository<LayerHeightProfile, Long> {
+}

backend/src/main/java/com/printcalculator/repository/MaterialOrcaProfileMapRepository.java

@@ -0,0 +1,20 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.FilamentMaterialType;
+import com.printcalculator.entity.MaterialOrcaProfileMap;
+import com.printcalculator.entity.PrinterMachineProfile;
+import org.springframework.data.jpa.repository.EntityGraph;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface MaterialOrcaProfileMapRepository extends JpaRepository<MaterialOrcaProfileMap, Long> {
+    Optional<MaterialOrcaProfileMap> findByPrinterMachineProfileAndFilamentMaterialTypeAndIsActiveTrue(
+            PrinterMachineProfile printerMachineProfile,
+            FilamentMaterialType filamentMaterialType
+    );
+
+    @EntityGraph(attributePaths = {"filamentMaterialType"})
+    List<MaterialOrcaProfileMap> findByPrinterMachineProfileAndIsActiveTrue(PrinterMachineProfile printerMachineProfile);
+}

backend/src/main/java/com/printcalculator/repository/NozzleOptionRepository.java

@@ -0,0 +1,7 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.NozzleOption;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface NozzleOptionRepository extends JpaRepository<NozzleOption, Long> {
+}

backend/src/main/java/com/printcalculator/repository/OrderItemRepository.java

@@ -0,0 +1,12 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.OrderItem;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface OrderItemRepository extends JpaRepository<OrderItem, UUID> {
+    List<OrderItem> findByOrder_Id(UUID orderId);
+    boolean existsByFilamentVariant_Id(Long filamentVariantId);
+}

backend/src/main/java/com/printcalculator/repository/OrderRepository.java

@@ -0,0 +1,13 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.Order;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface OrderRepository extends JpaRepository<Order, UUID> {
+    List<Order> findAllByOrderByCreatedAtDesc();
+
+    boolean existsBySourceQuoteSession_Id(UUID sourceQuoteSessionId);
+}

backend/src/main/java/com/printcalculator/repository/PaymentRepository.java

@@ -0,0 +1,11 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.Payment;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+import java.util.UUID;
+
+public interface PaymentRepository extends JpaRepository<Payment, UUID> {
+    Optional<Payment> findByOrder_Id(UUID orderId);
+}

backend/src/main/java/com/printcalculator/repository/PricingPolicyMachineHourTierRepository.java

@@ -0,0 +1,11 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.PricingPolicyMachineHourTier;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.printcalculator.entity.PricingPolicy;
+import java.util.List;
+
+public interface PricingPolicyMachineHourTierRepository extends JpaRepository<PricingPolicyMachineHourTier, Long> {
+    List<PricingPolicyMachineHourTier> findAllByPricingPolicyOrderByTierStartHoursAsc(PricingPolicy pricingPolicy);
+}

backend/src/main/java/com/printcalculator/repository/PricingPolicyRepository.java

@@ -0,0 +1,8 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.PricingPolicy;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PricingPolicyRepository extends JpaRepository<PricingPolicy, Long> {
+    PricingPolicy findFirstByIsActiveTrueOrderByValidFromDesc();
+}

backend/src/main/java/com/printcalculator/repository/PrinterFleetCurrentRepository.java

@@ -0,0 +1,7 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.PrinterFleetCurrent;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PrinterFleetCurrentRepository extends JpaRepository<PrinterFleetCurrent, Long> {
+}

backend/src/main/java/com/printcalculator/repository/PrinterMachineProfileRepository.java

@@ -0,0 +1,15 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.entity.PrinterMachineProfile;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.math.BigDecimal;
+import java.util.List;
+import java.util.Optional;
+
+public interface PrinterMachineProfileRepository extends JpaRepository<PrinterMachineProfile, Long> {
+    Optional<PrinterMachineProfile> findByPrinterMachineAndNozzleDiameterMmAndIsActiveTrue(PrinterMachine printerMachine, BigDecimal nozzleDiameterMm);
+    Optional<PrinterMachineProfile> findFirstByPrinterMachineAndIsDefaultTrueAndIsActiveTrue(PrinterMachine printerMachine);
+    List<PrinterMachineProfile> findByPrinterMachineAndIsActiveTrue(PrinterMachine printerMachine);
+}

backend/src/main/java/com/printcalculator/repository/PrinterMachineRepository.java

@@ -0,0 +1,11 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.PrinterMachine;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface PrinterMachineRepository extends JpaRepository<PrinterMachine, Long> {
+    Optional<PrinterMachine> findByPrinterDisplayName(String printerDisplayName);
+    Optional<PrinterMachine> findFirstByIsActiveTrue();
+}

backend/src/main/java/com/printcalculator/repository/QuoteLineItemRepository.java

@@ -0,0 +1,12 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.QuoteLineItem;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface QuoteLineItemRepository extends JpaRepository<QuoteLineItem, UUID> {
+    List<QuoteLineItem> findByQuoteSessionId(UUID quoteSessionId);
+    boolean existsByFilamentVariant_Id(Long filamentVariantId);
+}