fix(back-end): shift model

Reviewed-on: #1

.gitea/workflows/cicd.yaml

@@ -2,136 +2,169 @@ name: Build, Test and Deploy
 
 on:
   push:
-    branches:
-      - main
-      - int
-      - dev
+    branches: [main, int, dev]
+
+concurrency:
+  group: print-calculator-${{ gitea.ref }}
+  cancel-in-progress: true
 
 jobs:
   test-backend:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
 
-      - name: Set up Python
-        uses: actions/setup-python@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
         with:
-          python-version: '3.10'
+          java-version: '21'
+          distribution: 'temurin'
 
-      - name: Install dependencies
+      - name: Run Tests with Gradle
         run: |
-          pip install -r backend/requirements.txt
-          pip install pytest httpx
-
-      - name: Run Backend Tests
-        run: |
-          export PYTHONPATH=$PYTHONPATH:$(pwd)/backend
-          pytest backend/tests
+          cd backend
+          chmod +x gradlew
+          ./gradlew test
 
   build-and-push:
     needs: test-backend
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
 
-      - name: Set Environment Variables
+      - name: Set TAG + OWNER lowercase
+        shell: bash
         run: |
           if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
-            echo "TAG=prod" >> $GITHUB_ENV
+            echo "TAG=prod" >> "$GITHUB_ENV"
           elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
-            echo "TAG=int" >> $GITHUB_ENV
+            echo "TAG=int" >> "$GITHUB_ENV"
           else
-            echo "TAG=dev" >> $GITHUB_ENV
+            echo "TAG=dev" >> "$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
-        uses: docker/login-action@v2
-        with:
-          registry: ${{ secrets.REGISTRY_URL }}
-          username: ${{ secrets.GITEA_USER }}
-          password: ${{ secrets.GITEA_TOKEN }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          printf '%s' "${{ secrets.REGISTRY_TOKEN }}" | docker login "${{ secrets.REGISTRY_URL }}" \
+            -u "${{ secrets.REGISTRY_USER }}" --password-stdin
 
-      - name: Build and Push Backend
-        uses: docker/build-push-action@v4
-        with:
-          context: ./backend
-          push: true
-          tags: ${{ secrets.REGISTRY_URL }}/${{ gitea.repository_owner }}/print-calculator-backend:${{ env.TAG }}
+      - name: Build & Push Backend
+        shell: bash
+        run: |
+          BACKEND_IMAGE="${{ secrets.REGISTRY_URL }}/${{ env.OWNER_LOWER }}/print-calculator-backend:${{ env.TAG }}"
+          docker build -t "$BACKEND_IMAGE" ./backend
+          docker push "$BACKEND_IMAGE"
 
-      - name: Build and Push Frontend
-        uses: docker/build-push-action@v4
-        with:
-          context: ./frontend
-          push: true
-          tags: ${{ secrets.REGISTRY_URL }}/${{ gitea.repository_owner }}/print-calculator-frontend:${{ env.TAG }}
+      - name: Build & Push Frontend
+        shell: bash
+        run: |
+          FRONTEND_IMAGE="${{ 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 code
-        uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
 
-      - name: Set Deployment Vars
+      - name: Set ENV
+        shell: bash
         run: |
           if [[ "${{ gitea.ref }}" == "refs/heads/main" ]]; then
-            echo "ENV=prod" >> $GITHUB_ENV
-            echo "TAG=prod" >> $GITHUB_ENV
+            echo "ENV=prod" >> "$GITHUB_ENV"
           elif [[ "${{ gitea.ref }}" == "refs/heads/int" ]]; then
-            echo "ENV=int" >> $GITHUB_ENV
-            echo "TAG=int" >> $GITHUB_ENV
+            echo "ENV=int" >> "$GITHUB_ENV"
           else
-            echo "ENV=dev" >> $GITHUB_ENV
-            echo "TAG=dev" >> $GITHUB_ENV
+            echo "ENV=dev" >> "$GITHUB_ENV"
           fi
 
-      - name: Create Remote Directory
-        uses: appleboy/ssh-action@v0.1.10
-        with:
-          host: ${{ secrets.SERVER_HOST }}
-          username: ${{ secrets.SERVER_USER }}
-          key: ${{ secrets.SSH_PRIVATE_KEY }}
-          script: mkdir -p /mnt/user/appdata/print-calculator/${{ env.ENV }}/
+      - name: Setup SSH key
+        shell: bash
+        run: |
+          set -euo pipefail
 
-      - name: Copy Compose File to Server
-        uses: appleboy/scp-action@v0.1.4
-        with:
-          host: ${{ secrets.SERVER_HOST }}
-          username: ${{ secrets.SERVER_USER }}
-          key: ${{ secrets.SSH_PRIVATE_KEY }}
-          source: "docker-compose.deploy.yml"
-          target: "/mnt/user/appdata/print-calculator/${{ env.ENV }}/"
+          apt-get update
+          apt-get install -y --no-install-recommends openssh-client
 
-      - name: Copy Env File to Server
-        uses: appleboy/scp-action@v0.1.4
-        with:
-          host: ${{ secrets.SERVER_HOST }}
-          username: ${{ secrets.SERVER_USER }}
-          key: ${{ secrets.SSH_PRIVATE_KEY }}
-          source: "deploy/envs/${{ env.ENV }}.env"
-          target: "/mnt/user/appdata/print-calculator/${{ env.ENV }}/.env"
+          mkdir -p ~/.ssh
+          chmod 700 ~/.ssh
 
-      - name: Execute Remote Deployment
-        uses: appleboy/ssh-action@v0.1.10
-        with:
-          host: ${{ secrets.SERVER_HOST }}
-          username: ${{ secrets.SERVER_USER }}
-          key: ${{ secrets.SSH_PRIVATE_KEY }}
-          script: |
-            cd /mnt/user/appdata/print-calculator/${{ env.ENV }}/
+          # 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
+
+          ssh-keyscan -H "${{ secrets.SERVER_HOST }}" >> ~/.ssh/known_hosts 2>/dev/null
+
+      - name: Write env to server
+        shell: bash
+        run: |
+          # 1. Start with the static env file content
+          cat "deploy/envs/${{ env.ENV }}.env" > /tmp/full_env.env
+
+          # 2. Determine DB credentials
+          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="${{ secrets.DB_PASSWORD_DEV }}"
+          fi
+
+          # 3. Append DB credentials
+          printf '\nDB_URL=%s\nDB_USERNAME=%s\nDB_PASSWORD=%s\n' \
+            "$DB_URL" "$DB_USER" "$DB_PASS" >> /tmp/full_env.env
+
+          # 4. Debug: print content (for debug purposes)
+          echo "Preparing to send env file with variables:"
+          grep -v "PASSWORD" /tmp/full_env.env || true
+
+          # 5. Send to server
+          ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" \
+            "setenv ${{ env.ENV }}" < /tmp/full_env.env
             
-            # Rename the copied env file to strictly '.env' so docker compose picks it up automatically
-            mv ${{ env.ENV }}.env .env
-            
-            # Login to registry
-            echo ${{ secrets.GITEA_TOKEN }} | docker login ${{ secrets.REGISTRY_URL }} -u ${{ secrets.GITEA_USER }} --password-stdin
-            
-            # Pull new images
-            # We force reading from .env just to be safe, though default behavior does it too.
-            docker compose --env-file .env -f docker-compose.deploy.yml pull
-            
-            # Start/Update services
-            # TAG is inside .env now, so we don't even need to pass it explicitly!
-            docker compose --env-file .env -f docker-compose.deploy.yml up -d --remove-orphans
+
+
+      - name: Trigger deploy on Unraid (forced command key)
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          # Aggiungiamo le opzioni di verbosità se dovesse fallire ancora, 
+          # e assicuriamoci che l'input sia pulito
+          ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" "deploy ${{ env.ENV }}"

.gitignore

@@ -35,3 +35,9 @@ replay_pid*
 .classpath
 .settings/
 .DS_Store
+
+# Build Results
+target/
+build/
+.gradle/
+.mvn/

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/.gitignore

@@ -0,0 +1,54 @@
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+target
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbproject/public/
+/nbproject/project.properties
+/nbproject/project.xml
+
+### VS Code ###
+.vscode/
+
+### Gradle ###
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### Java ###
+*.class
+*.log
+*.ctxt
+.mtj.tmp/
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+### Spring Boot ###
+HELP.md
+
+!gradle/wrapper/gradle-wrapper.jar

backend/Dockerfile

@@ -1,6 +1,17 @@
-FROM --platform=linux/amd64 python:3.10-slim-bookworm
+# Stage 1: Build Java JAR
+FROM eclipse-temurin:21-jdk-jammy AS build
+WORKDIR /app
+COPY gradle gradle
+COPY gradlew build.gradle settings.gradle ./
+# Download dependencies first to cache them
+RUN ./gradlew dependencies --no-daemon
+COPY src ./src
+RUN ./gradlew bootJar -x test --no-daemon
 
-# Install system dependencies for OrcaSlicer (AppImage)
+# Stage 2: Runtime Environment
+FROM eclipse-temurin:21-jre-jammy
+
+# Install system dependencies for OrcaSlicer
 RUN apt-get update && apt-get install -y \
     wget \
     p7zip-full \
@@ -8,36 +19,36 @@ 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 \
+    libx11-xcb1 \
+    libxcb-dri3-0 \
+    libxtst6 \
+    libnss3 \
+    libatk-bridge2.0-0 \
+    libxss1 \
+    libasound2 \
+    libgbm1 \
     && rm -rf /var/lib/apt/lists/*
 
-# Set working directory
-WORKDIR /app
-
-# Download and extract OrcaSlicer
-# Using v2.2.0 as a stable recent release
-# We extract the AppImage to run it without FUSE
+# Install OrcaSlicer
+WORKDIR /opt
 RUN wget -q https://github.com/SoftFever/OrcaSlicer/releases/download/v2.2.0/OrcaSlicer_Linux_V2.2.0.AppImage -O OrcaSlicer.AppImage \
     && 7z x OrcaSlicer.AppImage -o/opt/orcaslicer \
     && chmod -R +x /opt/orcaslicer \
     && rm OrcaSlicer.AppImage
 
-# Add OrcaSlicer to PATH
 ENV PATH="/opt/orcaslicer/usr/bin:${PATH}"
+# Set Slicer Path env variable for Java app
+ENV SLICER_PATH="/opt/orcaslicer/AppRun"
 
-# Install Python dependencies
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+WORKDIR /app
+# Copy JAR from build stage
+COPY --from=build /app/build/libs/*.jar app.jar
+# Copy profiles
+COPY profiles ./profiles
 
-# Create directories for app and temp files
-RUN mkdir -p /app/temp /app/profiles
+EXPOSE 8080
 
-# Copy application code
-COPY . .
-
-# Expose port
-EXPOSE 8000
-
-# Run the application
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
+COPY entrypoint.sh .
+RUN chmod +x entrypoint.sh
+ENTRYPOINT ["./entrypoint.sh"]

backend/api/routes.py

@@ -1,137 +0,0 @@
-from fastapi import APIRouter, UploadFile, File, HTTPException, Form
-from models.quote_request import QuoteRequest, QuoteResponse
-from slicer import slicer_service
-from calculator import GCodeParser, QuoteCalculator
-from config import settings
-from profile_manager import ProfileManager
-import os
-import shutil
-import uuid
-import logging
-import json
-
-router = APIRouter()
-logger = logging.getLogger("api")
-profile_manager = ProfileManager()
-
-def cleanup_files(files: list):
-    for f in files:
-        try:
-            if os.path.exists(f):
-                os.remove(f)
-        except Exception as e:
-            logger.warning(f"Failed to delete temp file {f}: {e}")
-
-def format_time(seconds: int) -> str:
-    m, s = divmod(seconds, 60)
-    h, m = divmod(m, 60)
-    if h > 0:
-        return f"{int(h)}h {int(m)}m"
-    return f"{int(m)}m {int(s)}s"
-
-@router.post("/quote", response_model=QuoteResponse)
-async def calculate_quote(
-    file: UploadFile = File(...),
-    # Compatible with form data if we parse manually or use specific dependencies.
-    # FastAPI handling of mixed File + JSON/Form is tricky.
-    # Easiest is to use Form(...) for fields.
-    machine: str = Form("bambu_a1"),
-    filament: str = Form("pla_basic"),
-    quality: str = Form("standard"),
-    layer_height: str = Form(None), # Form data comes as strings usually
-    infill_density: int = Form(None),
-    infill_pattern: str = Form(None),
-    support_enabled: bool = Form(False),
-    print_speed: int = Form(None)
-):
-    """
-    Endpoint for calculating print quote.
-    Accepts Multipart Form Data:
-    - file: The STL file
-    - machine, filament, quality: strings
-    - other overrides
-    """
-    if not file.filename.lower().endswith(".stl"):
-        raise HTTPException(status_code=400, detail="Only .stl files are supported.")
-    if machine != "bambu_a1":
-        raise HTTPException(status_code=400, detail="Unsupported machine.")
-
-    req_id = str(uuid.uuid4())
-    input_filename = f"{req_id}.stl"
-    output_filename = f"{req_id}.gcode"
-    
-    input_path = os.path.join(settings.TEMP_DIR, input_filename)
-    output_path = os.path.join(settings.TEMP_DIR, output_filename)
-
-    try:
-        # 1. Save File
-        with open(input_path, "wb") as buffer:
-            shutil.copyfileobj(file.file, buffer)
-            
-        # 2. Build Overrides
-        overrides = {}
-        if layer_height is not None and layer_height != "":
-            overrides["layer_height"] = layer_height
-        if infill_density is not None:
-            overrides["sparse_infill_density"] = f"{infill_density}%"
-        if infill_pattern:
-            overrides["sparse_infill_pattern"] = infill_pattern
-        if support_enabled: overrides["enable_support"] = "1"
-        if print_speed is not None:
-            overrides["default_print_speed"] = str(print_speed)
-
-        # 3. Slice
-        # Pass parameters to slicer service
-        slicer_service.slice_stl(
-            input_stl_path=input_path,
-            output_gcode_path=output_path,
-            machine=machine,
-            filament=filament,
-            quality=quality,
-            overrides=overrides
-        )
-        
-        # 4. Parse
-        stats = GCodeParser.parse_metadata(output_path)
-        if stats["print_time_seconds"] == 0 and stats["filament_weight_g"] == 0:
-             raise HTTPException(status_code=500, detail="Slicing returned empty stats.")
-
-        # 5. Calculate
-        # We could allow filament cost override here too if passed in params
-        quote = QuoteCalculator.calculate(stats)
-        
-        return QuoteResponse(
-            success=True,
-            data={
-                "print_time_seconds": stats["print_time_seconds"],
-                "print_time_formatted": format_time(stats["print_time_seconds"]),
-                "material_grams": stats["filament_weight_g"],
-                "cost": {
-                    "material": quote["breakdown"]["material_cost"],
-                    "machine": quote["breakdown"]["machine_cost"],
-                    "energy": quote["breakdown"]["energy_cost"],
-                    "markup": quote["breakdown"]["markup_amount"],
-                    "total": quote["total_price"]
-                },
-                "parameters": {
-                    "machine": machine,
-                    "filament": filament,
-                    "quality": quality
-                }
-            }
-        )
-
-    except Exception as e:
-        logger.error(f"Quote error: {e}", exc_info=True)
-        return QuoteResponse(success=False, error=str(e))
-    
-    finally:
-        cleanup_files([input_path, output_path])
-
-@router.get("/profiles/available")
-def get_profiles():
-    return {
-        "machines": profile_manager.list_machines(),
-        "filaments": profile_manager.list_filaments(),
-        "processes": profile_manager.list_processes()
-    }

backend/build.gradle

@@ -0,0 +1,55 @@
+plugins {
+	id 'java'
+	id 'application'
+	id 'org.springframework.boot' version '3.4.1'
+	id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.printcalculator'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+application {
+	mainClass = 'com.printcalculator.BackendApplication'
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'xyz.capybara:clamav-client:2.1.2'
+	runtimeOnly 'org.postgresql:postgresql'
+	developmentOnly 'org.springframework.boot:spring-boot-devtools'
+	testImplementation 'org.springframework.boot:spring-boot-starter-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'
+
+
+
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
+
+tasks.named('bootRun') {
+	args = ["--spring.profiles.active=local"]
+}
+
+application {
+	applicationDefaultJvmArgs = ["-Dspring.profiles.active=local"]
+}

backend/calculator.py

@@ -1,174 +0,0 @@
-import re
-import os
-import logging
-from typing import Dict, Any, Optional
-from config import settings
-
-logger = logging.getLogger(__name__)
-
-class GCodeParser:
-    @staticmethod
-    def parse_metadata(gcode_path: str) -> Dict[str, Any]:
-        """
-        Parses the G-code to extract estimated time and material usage.
-        Scans both the beginning (header) and end (footer) of the file.
-        """
-        stats = {
-            "print_time_seconds": 0,
-            "filament_length_mm": 0,
-            "filament_volume_mm3": 0,
-            "filament_weight_g": 0,
-            "slicer_estimated_cost": 0
-        }
-
-        if not os.path.exists(gcode_path):
-            logger.warning(f"GCode file not found for parsing: {gcode_path}")
-            return stats
-
-        try:
-            with open(gcode_path, 'r', encoding='utf-8', errors='ignore') as f:
-                # Read header (first 500 lines)
-                header_lines = [f.readline().strip() for _ in range(500) if f]
-
-                # Read footer (last 20KB)
-                f.seek(0, 2)
-                file_size = f.tell()
-                read_len = min(file_size, 20480)
-                f.seek(file_size - read_len)
-                footer_lines = f.read().splitlines()
-
-                all_lines = header_lines + footer_lines
-
-                for line in all_lines:
-                    line = line.strip()
-                    if not line.startswith(";"): 
-                        continue
-                    
-                    GCodeParser._parse_line(line, stats)
-
-                # Fallback calculation
-                if stats["filament_weight_g"] == 0 and stats["filament_length_mm"] > 0:
-                    GCodeParser._calculate_weight_fallback(stats)
-                    
-        except Exception as e:
-            logger.error(f"Error parsing G-code: {e}")
-
-        return stats
-
-    @staticmethod
-    def _parse_line(line: str, stats: Dict[str, Any]):
-        # Parse Time
-        if "estimated printing time =" in line: # Header
-            time_str = line.split("=")[1].strip()
-            logger.info(f"Parsing time string (Header): '{time_str}'")
-            stats["print_time_seconds"] = GCodeParser._parse_time_string(time_str)
-        elif "total estimated time:" in line: # Footer
-            parts = line.split("total estimated time:")
-            if len(parts) > 1:
-                time_str = parts[1].strip()
-                logger.info(f"Parsing time string (Footer): '{time_str}'")
-                stats["print_time_seconds"] = GCodeParser._parse_time_string(time_str)
-
-        # Parse Filament info
-        if "filament used [g] =" in line:
-            try:
-                stats["filament_weight_g"] = float(line.split("=")[1].strip())
-            except ValueError: pass
-        
-        if "filament used [mm] =" in line:
-            try:
-                stats["filament_length_mm"] = float(line.split("=")[1].strip())
-            except ValueError: pass
-
-        if "filament used [cm3] =" in line:
-            try:
-                 # cm3 to mm3
-                stats["filament_volume_mm3"] = float(line.split("=")[1].strip()) * 1000
-            except ValueError: pass
-
-    @staticmethod
-    def _calculate_weight_fallback(stats: Dict[str, Any]):
-        # Assumes 1.75mm diameter and PLA density 1.24
-        radius = 1.75 / 2
-        volume_mm3 = 3.14159 * (radius ** 2) * stats["filament_length_mm"]
-        volume_cm3 = volume_mm3 / 1000.0
-        stats["filament_weight_g"] = volume_cm3 * 1.24
-
-    @staticmethod
-    def _parse_time_string(time_str: str) -> int:
-        """
-        Converts '1d 2h 3m 4s' or 'HH:MM:SS' to seconds.
-        """
-        total_seconds = 0
-        
-        # Try HH:MM:SS or MM:SS format
-        if ':' in time_str:
-            parts = time_str.split(':')
-            parts = [int(p) for p in parts]
-            if len(parts) == 3: # HH:MM:SS
-                total_seconds = parts[0] * 3600 + parts[1] * 60 + parts[2]
-            elif len(parts) == 2: # MM:SS
-                total_seconds = parts[0] * 60 + parts[1]
-            return total_seconds
-
-        # Original regex parsing for "1h 2m 3s"
-        days = re.search(r'(\d+)d', time_str)
-        hours = re.search(r'(\d+)h', time_str)
-        mins = re.search(r'(\d+)m', time_str)
-        secs = re.search(r'(\d+)s', time_str)
-
-        if days: total_seconds += int(days.group(1)) * 86400
-        if hours: total_seconds += int(hours.group(1)) * 3600
-        if mins: total_seconds += int(mins.group(1)) * 60
-        if secs: total_seconds += int(secs.group(1))
-        
-        return total_seconds
-
-
-class QuoteCalculator:
-    @staticmethod
-    def calculate(stats: Dict[str, Any]) -> Dict[str, Any]:
-        """
-        Calculates the final quote based on parsed stats and settings.
-        """
-        # 1. Material Cost
-        # Cost per gram = (Cost per kg / 1000)
-        material_cost = (stats["filament_weight_g"] / 1000.0) * settings.FILAMENT_COST_PER_KG
-
-        # 2. Machine Time Cost
-        # Cost per second = (Cost per hour / 3600)
-        print("ciaooo")
-        print(stats["print_time_seconds"])
-        print_time_hours = stats["print_time_seconds"] / 3600.0
-        machine_cost = print_time_hours * settings.MACHINE_COST_PER_HOUR
-
-        # 3. Energy Cost
-        # kWh = (Watts / 1000) * hours
-        kwh_used = (settings.PRINTER_POWER_WATTS / 1000.0) * print_time_hours
-        energy_cost = kwh_used * settings.ENERGY_COST_PER_KWH
-
-        # Subtotal
-        subtotal = material_cost + machine_cost + energy_cost
-
-        # 4. Markup
-        markup_factor = 1.0 + (settings.MARKUP_PERCENT / 100.0)
-        total_price = subtotal * markup_factor
-
-        logger.info("Cost Calculation:")
-        logger.info(f"  - Use: {stats['filament_weight_g']:.2f}g @ {settings.FILAMENT_COST_PER_KG}€/kg = {material_cost:.2f}€")
-        logger.info(f"  - Time: {print_time_hours:.4f}h @ {settings.MACHINE_COST_PER_HOUR}€/h = {machine_cost:.2f}€")
-        logger.info(f"  - Power: {kwh_used:.4f}kWh @ {settings.ENERGY_COST_PER_KWH}€/kWh = {energy_cost:.2f}€")
-        logger.info(f"  - Subtotal: {subtotal:.2f}€")
-        logger.info(f"  - Total (Markup {settings.MARKUP_PERCENT}%): {total_price:.2f}€")
-
-        return {
-            "breakdown": {
-                "material_cost": round(material_cost, 2),
-                "machine_cost": round(machine_cost, 2),
-                "energy_cost": round(energy_cost, 2),
-                "subtotal": round(subtotal, 2),
-                "markup_amount": round(total_price - subtotal, 2)
-            },
-            "total_price": round(total_price, 2),
-            "currency": "EUR"
-        }

backend/config.py

@@ -1,31 +0,0 @@
-import os
-import sys
-
-class Settings:
-    # Directories
-    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
-    TEMP_DIR = os.environ.get("TEMP_DIR", os.path.join(BASE_DIR, "temp"))
-    PROFILES_DIR = os.environ.get("PROFILES_DIR", os.path.join(BASE_DIR, "profiles"))
-
-    # Slicer Paths
-    if sys.platform == "darwin":
-        _DEFAULT_SLICER_PATH = "/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer"
-    else:
-        _DEFAULT_SLICER_PATH = "/opt/orcaslicer/AppRun"
-
-    SLICER_PATH = os.environ.get("SLICER_PATH", _DEFAULT_SLICER_PATH)
-    ORCA_HOME = os.environ.get("ORCA_HOME", "/opt/orcaslicer")
-    
-    # Defaults Profiles (Bambu A1)
-    MACHINE_PROFILE = os.path.join(PROFILES_DIR, "Bambu_Lab_A1_machine.json")
-    PROCESS_PROFILE = os.path.join(PROFILES_DIR, "Bambu_Process_0.20_Standard.json")
-    FILAMENT_PROFILE = os.path.join(PROFILES_DIR, "Bambu_PLA_Basic.json")
-
-    # Pricing
-    FILAMENT_COST_PER_KG = float(os.environ.get("FILAMENT_COST_PER_KG", 25.0))
-    MACHINE_COST_PER_HOUR = float(os.environ.get("MACHINE_COST_PER_HOUR", 2.0))
-    ENERGY_COST_PER_KWH = float(os.environ.get("ENERGY_COST_PER_KWH", 0.30))
-    PRINTER_POWER_WATTS = float(os.environ.get("PRINTER_POWER_WATTS", 150.0))
-    MARKUP_PERCENT = float(os.environ.get("MARKUP_PERCENT", 20.0))
-
-settings = Settings()

backend/entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+echo "----------------------------------------------------------------"
+echo "Starting Backend Application"
+echo "DB_URL: $DB_URL"
+echo "DB_USERNAME: $DB_USERNAME"
+echo "SLICER_PATH: $SLICER_PATH"
+echo "--- ALL ENV VARS ---"
+env
+echo "----------------------------------------------------------------"
+
+# Exec java with explicit properties from env
+exec java -jar app.jar \
+  --spring.datasource.url="${DB_URL}" \
+  --spring.datasource.username="${DB_USERNAME}" \
+  --spring.datasource.password="${DB_PASSWORD}"

backend/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

backend/gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

backend/gradlew.bat

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

backend/main.py

@@ -1,74 +0,0 @@
-import logging
-import os
-from fastapi import FastAPI
-from fastapi.middleware.cors import CORSMiddleware
-from config import settings
-from api.routes import router as api_router
-
-# Configure logging
-logging.basicConfig(level=logging.INFO)
-logger = logging.getLogger("main")
-
-app = FastAPI(title="Print Calculator API")
-
-# CORS Setup
-app.add_middleware(
-    CORSMiddleware,
-    allow_origins=["*"],
-    allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
-)
-
-# Ensure directories exist
-os.makedirs(settings.TEMP_DIR, exist_ok=True)
-
-# Include Router
-app.include_router(api_router, prefix="/api")
-
-# Legacy endpoint redirect or basic handler if needed for backward compatibility
-# The frontend likely calls /calculate/stl.
-# We should probably keep the old route or instruct user to update frontend.
-# But for this task, let's remap the old route to the new logic if possible, 
-# or just expose the new route.
-# The user request said: "Creare api/routes.py ... @app.post('/api/quote')"
-# So we are creating a new endpoint.
-# Existing frontend might break? 
-# The context says: "Currently uses hardcoded... Objective is to render system flexible... Frontend: Angular 19"
-# The user didn't explicitly ask to update the frontend, but the new API is at /api/quote.
-# I will keep the old "/calculate/stl" endpoint support by forwarding it or duplicating logic if critical,
-# OR I'll assume the user will handle frontend updates. 
-# Better: I will alias the old route to the new one if parameters allow, 
-# but the new one expects Form data with different names maybe?
-# Old: `/calculate/stl` just expected a file.
-# I'll enable a simplified version on the old route for backward compat using defaults.
-
-from fastapi import UploadFile, File
-from api.routes import calculate_quote
-
-@app.post("/calculate/stl")
-async def legacy_calculate(file: UploadFile = File(...)):
-    """Legacy endpoint compatibility"""
-    # Call the new logic with defaults
-    resp = await calculate_quote(file=file)
-    if not resp.success:
-         from fastapi import HTTPException
-         raise HTTPException(status_code=500, detail=resp.error)
-    
-    # Map Check response to old format
-    data = resp.data
-    return {
-        "print_time_seconds": data.get("print_time_seconds", 0),
-        "print_time_formatted": data.get("print_time_formatted", ""),
-        "material_grams": data.get("material_grams", 0.0),
-        "cost": data.get("cost", {}),
-        "notes": ["Generated via Dynamic Slicer (Legacy Endpoint)"]
-    }
-
-@app.get("/health")
-def health_check():
-    return {"status": "ok", "slicer": settings.SLICER_PATH}
-
-if __name__ == "__main__":
-    import uvicorn
-    uvicorn.run(app, host="0.0.0.0", port=8000)

backend/models/quote_request.py

@@ -1,37 +0,0 @@
-from pydantic import BaseModel, Field, validator
-from typing import Optional, Literal, Dict, Any
-
-class QuoteRequest(BaseModel):
-    # File STL (base64 or path)
-    file_path: Optional[str] = None
-    file_base64: Optional[str] = None
-    
-    # Parametri slicing
-    machine: str = Field(default="bambu_a1", description="Machine type")
-    filament: str = Field(default="pla_basic", description="Filament type")
-    quality: Literal["draft", "standard", "fine"] = Field(default="standard")
-    
-    # Parametri opzionali
-    layer_height: Optional[float] = Field(None, ge=0.08, le=0.32)
-    infill_density: Optional[int] = Field(None, ge=0, le=100)
-    support_enabled: Optional[bool] = None
-    print_speed: Optional[int] = Field(None, ge=20, le=300)
-    
-    # Pricing overrides
-    filament_cost_override: Optional[float] = None
-    
-    @validator('machine')
-    def validate_machine(cls, v):
-        # This list should ideally be dynamic, but for validation purposes we start with known ones.
-        # Logic in ProfileManager can be looser or strict.
-        # For now, we allow the string through and let ProfileManager validate availability.
-        return v
-    
-    @validator('filament')
-    def validate_filament(cls, v):
-        return v
-
-class QuoteResponse(BaseModel):
-    success: bool
-    data: Optional[Dict[str, Any]] = None
-    error: Optional[str] = None

backend/profile_cache.py

@@ -1,15 +0,0 @@
-from functools import lru_cache
-import hashlib
-from typing import Dict, Tuple
-
-# We can't cache the profile manager instance itself easily if it's not a singleton,
-# but we can cache the result of a merge function if we pass simple types.
-# However, to avoid circular imports or complex dependency injection, 
-# we will just provide a helper to generate cache keys and a holder for logic if needed.
-# For now, the ProfileManager will strictly determine *what* to merge.
-# Validating the cache strategy: since file I/O is the bottleneck, we want to cache the *content*.
-
-def get_cache_key(machine: str, filament: str, process: str) -> str:
-    """Helper to create a unique cache key"""
-    data = f"{machine}|{filament}|{process}"
-    return hashlib.md5(data.encode()).hexdigest()

backend/profile_manager.py

@@ -1,193 +0,0 @@
-import os
-import json
-import logging
-from typing import Dict, List, Tuple, Optional
-from profile_cache import get_cache_key
-
-
-logger = logging.getLogger(__name__)
-
-class ProfileManager:
-    def __init__(self, profiles_root: str = "profiles"):
-        # Assuming profiles_root is relative to backend or absolute
-        if not os.path.isabs(profiles_root):
-            base_dir = os.path.dirname(os.path.abspath(__file__))
-            self.profiles_root = os.path.join(base_dir, profiles_root)
-        else:
-            self.profiles_root = profiles_root
-            
-        if not os.path.exists(self.profiles_root):
-            logger.warning(f"Profiles root not found: {self.profiles_root}")
-
-    def get_profiles(self, machine: str, filament: str, process: str) -> Tuple[Dict, Dict, Dict]:
-        """
-        Main entry point to get merged profiles.
-        Args:
-            machine: e.g. "Bambu Lab A1 0.4 nozzle"
-            filament: e.g. "Bambu PLA Basic @BBL A1"
-            process: e.g. "0.20mm Standard @BBL A1"
-        """
-        # Try cache first (although specific logic is needed if we cache the *result* or the *files*)
-        # Since we implemented a simple external cache helper, let's use it if we want, 
-        # but for now we will rely on internal logic or the lru_cache decorator on a helper method.
-        # But wait, the `get_cached_profiles` in profile_cache.py calls `build_merged_profiles` which is logic WE need to implement.
-        # So we should probably move the implementation here and have the cache wrapper call it, 
-        # OR just implement it here and wrap it.
-        
-        return self._build_merged_profiles(machine, filament, process)
-
-    def _build_merged_profiles(self, machine_name: str, filament_name: str, process_name: str) -> Tuple[Dict, Dict, Dict]:
-        # We need to find the files. 
-        # The naming convention in OrcaSlicer profiles usually involves the Vendor (e.g. BBL).
-        # We might need a mapping or search.
-        # For this implementation, we will assume we know the relative paths or search for them.
-        
-        # Strategy: Search in all vendor subdirs for the specific JSON files.
-        # Because names are usually unique enough or we can specify the expected vendor.
-        # However, to be fast, we can map "machine_name" to a file path.
-        
-        machine_file = self._find_profile_file(machine_name, "machine")
-        filament_file = self._find_profile_file(filament_name, "filament")
-        process_file = self._find_profile_file(process_name, "process")
-        
-        if not machine_file:
-            raise FileNotFoundError(f"Machine profile not found: {machine_name}")
-        if not filament_file:
-            raise FileNotFoundError(f"Filament profile not found: {filament_name}")
-        if not process_file:
-            raise FileNotFoundError(f"Process profile not found: {process_name}")
-            
-        machine_profile = self._merge_chain(machine_file)
-        filament_profile = self._merge_chain(filament_file)
-        process_profile = self._merge_chain(process_file)
-        
-        # Apply patches
-        machine_profile = self._apply_patches(machine_profile, "machine")
-        process_profile = self._apply_patches(process_profile, "process")
-        
-        return machine_profile, process_profile, filament_profile
-
-    def _find_profile_file(self, profile_name: str, profile_type: str) -> Optional[str]:
-        """
-        Searches for a profile file by name in the profiles directory.
-        The name should match the filename (without .json possibly) or be a precise match.
-        """
-        # Add .json if missing
-        filename = profile_name if profile_name.endswith(".json") else f"{profile_name}.json"
-        
-        for root, dirs, files in os.walk(self.profiles_root):
-            if filename in files:
-                # Check if it is in the correct type folder (machine, filament, process)
-                # OrcaSlicer structure: Vendor/process/file.json
-                # We optionally verify parent dir
-                if os.path.basename(root) == profile_type or profile_type in root:
-                    return os.path.join(root, filename)
-                
-                # Fallback: if we simply found it, maybe just return it? 
-                # Some common files might be in root or other places.
-                # Let's return it if we are fairly sure.
-                return os.path.join(root, filename)
-        
-        return None
-
-    def _merge_chain(self, final_file_path: str) -> Dict:
-        """
-        Resolves inheritance and merges.
-        """
-        chain = []
-        current_path = final_file_path
-        
-        # 1. Build chain
-        while current_path:
-            chain.insert(0, current_path) # Prepend
-            
-            with open(current_path, 'r', encoding='utf-8') as f:
-                try:
-                    data = json.load(f)
-                except json.JSONDecodeError as e:
-                    logger.error(f"Failed to decode JSON: {current_path}")
-                    raise e
-            
-            inherits = data.get("inherits")
-            if inherits:
-                # Resolve inherited file
-                # It is usually in the same directory or relative.
-                # OrcaSlicer logic: checks same dir, then parent, etc.
-                # Usually it's in the same directory.
-                parent_dir = os.path.dirname(current_path)
-                inherited_path = os.path.join(parent_dir, inherits)
-                
-                # Special case: if not found, it might be in a common folder? 
-                # But OrcaSlicer usually keeps them local or in specific common dirs.
-                if not os.path.exists(inherited_path) and not inherits.endswith(".json"):
-                     inherited_path += ".json"
-                
-                if os.path.exists(inherited_path):
-                    current_path = inherited_path
-                else:
-                    # Could be a system common file not in the same dir?
-                    # For simplicty, try to look up in the same generic type folder across the vendor?
-                    # Or just fail for now. 
-                    # Often "fdm_machine_common.json" is at the Vendor root or similar?
-                    # Let's try searching recursively if not found in place.
-                    found = self._find_profile_file(inherits, "any") # "any" type
-                    if found:
-                        current_path = found
-                    else:
-                        logger.warning(f"Inherited profile '{inherits}' not found for '{current_path}' (Root: {self.profiles_root})")
-                        current_path = None
-            else:
-                current_path = None
-
-        # 2. Merge
-        merged = {}
-        for path in chain:
-            with open(path, 'r', encoding='utf-8') as f:
-                data = json.load(f)
-                # Shallow update
-                merged.update(data)
-                
-        # Remove metadata
-        merged.pop("inherits", None)
-        
-        return merged
-
-    def _apply_patches(self, profile: Dict, profile_type: str) -> Dict:
-        if profile_type == "machine":
-            # Patch: G92 E0 to ensure extrusion reference text matches
-            lcg = profile.get("layer_change_gcode", "")
-            if "G92 E0" not in lcg:
-                # Append neatly
-                if lcg and not lcg.endswith("\n"):
-                    lcg += "\n"
-                lcg += "G92 E0"
-                profile["layer_change_gcode"] = lcg
-            
-            # Patch: ensure printable height is sufficient? 
-            # Only if necessary. For now, trust the profile.
-
-        elif profile_type == "process":
-            # Optional: Disable skirt/brim if we want a "clean" print estimation?
-            # Actually, for accurate cost, we SHOULD include skirt/brim if the profile has it.
-            pass
-            
-        return profile
-    
-    def list_machines(self) -> List[str]:
-        # Simple helper to list available machine JSONs
-        return self._list_profiles_by_type("machine")
-        
-    def list_filaments(self) -> List[str]:
-        return self._list_profiles_by_type("filament")
-
-    def list_processes(self) -> List[str]:
-        return self._list_profiles_by_type("process")
-
-    def _list_profiles_by_type(self, ptype: str) -> List[str]:
-        results = []
-        for root, dirs, files in os.walk(self.profiles_root):
-            if os.path.basename(root) == ptype:
-                for f in files:
-                    if f.endswith(".json") and "common" not in f:
-                         results.append(f.replace(".json", ""))
-        return sorted(results)

backend/profile_mappings.json

@@ -1,24 +0,0 @@
-{
-  "quality_to_process": {
-    "draft": "0.28mm Extra Draft @BBL A1",
-    "standard": "0.20mm Standard @BBL A1",
-    "fine": "0.12mm Fine @BBL A1"
-  },
-  "filament_costs": {
-    "pla_basic": 20.0,
-    "petg_basic": 25.0,
-    "abs_basic": 22.0,
-    "tpu_95a": 35.0
-  },
-  "filament_to_profile": {
-    "pla_basic": "Bambu PLA Basic @BBL A1",
-    "petg_basic": "Bambu PETG Basic @BBL A1",
-    "abs_basic": "Bambu ABS @BBL A1",
-    "tpu_95a": "Bambu TPU 95A @BBL A1"
-  },
-  "machine_to_profile": {
-    "bambu_a1": "Bambu Lab A1 0.4 nozzle",
-    "bambu_x1": "Bambu Lab X1 Carbon 0.4 nozzle",
-    "bambu_p1s": "Bambu Lab P1S 0.4 nozzle"
-  }
-}

backend/requirements.txt

@@ -1,4 +0,0 @@
-fastapi==0.109.0
-uvicorn==0.27.0
-python-multipart==0.0.6
-requests==2.31.0

backend/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'print-calculator-backend'

backend/slicer.py

@@ -1,154 +0,0 @@
-import subprocess
-import os
-import json
-import logging
-import shutil
-import tempfile
-from typing import Optional, Dict
-from config import settings
-from profile_manager import ProfileManager
-
-logger = logging.getLogger(__name__)
-
-class SlicerService:
-    def __init__(self):
-        self.profile_manager = ProfileManager()
-    
-    def slice_stl(
-        self,
-        input_stl_path: str,
-        output_gcode_path: str,
-        machine: str = "bambu_a1",
-        filament: str = "pla_basic",
-        quality: str = "standard",
-        overrides: Optional[Dict] = None
-    ) -> bool:
-        """
-        Runs OrcaSlicer in headless mode with dynamic profiles.
-        """
-        if not os.path.exists(settings.SLICER_PATH):
-             raise RuntimeError(f"Slicer executable not found at: {settings.SLICER_PATH}")
-
-        if not os.path.exists(input_stl_path):
-            raise FileNotFoundError(f"STL file not found: {input_stl_path}")
-
-        # 1. Get Merged Profiles
-        # Use simple mapping if the input is short code (bambu_a1) vs full name
-        # For now, we assume the caller solves the mapping or passes full names?
-        # Actually, the user wants "Bambu A1" from API to map to "Bambu Lab A1 0.4 nozzle"
-        # We should use the mapping logic here or in the caller?
-        # The implementation plan said "profile_mappings.json" maps keys.
-        # It's better to handle mapping in the Service layer or Manager.
-        # Let's load the mapping in the service for now, or use a helper.
-        
-        # We'll use a helper method to resolve names to full profile names using the loaded mapping.
-        machine_p, filament_p, quality_p = self._resolve_profile_names(machine, filament, quality)
-        
-        try:
-            m_profile, p_profile, f_profile = self.profile_manager.get_profiles(machine_p, filament_p, quality_p)
-        except FileNotFoundError as e:
-            logger.error(f"Profile error: {e}")
-            raise RuntimeError(f"Profile generation failed: {e}")
-
-        # 2. Apply Overrides
-        if overrides:
-            p_profile = self._apply_overrides(p_profile, overrides)
-            # Some overrides might apply to machine or filament, but mostly process.
-            # E.g. layer_height is in process.
-
-        # 3. Write Temp Profiles
-        # We create a temp dir for this slice job
-        output_dir = os.path.dirname(output_gcode_path)
-        # We keep temp profiles in a hidden folder or just temp
-        # Using a context manager for temp dir might be safer but we need it for the subprocess duration
-        
-        with tempfile.TemporaryDirectory() as temp_dir:
-            m_path = os.path.join(temp_dir, "machine.json")
-            p_path = os.path.join(temp_dir, "process.json")
-            f_path = os.path.join(temp_dir, "filament.json")
-            
-            with open(m_path, 'w') as f: json.dump(m_profile, f)
-            with open(p_path, 'w') as f: json.dump(p_profile, f)
-            with open(f_path, 'w') as f: json.dump(f_profile, f)
-            
-            # 4. Build Command
-            command = self._build_slicer_command(input_stl_path, output_dir, m_path, p_path, f_path)
-            
-            logger.info(f"Starting slicing for {input_stl_path} [M:{machine_p} F:{filament_p} Q:{quality_p}]")
-            try:
-                self._run_command(command)
-                self._finalize_output(output_dir, input_stl_path, output_gcode_path)
-                logger.info("Slicing completed successfully.")
-                return True
-            except subprocess.CalledProcessError as e:
-                # Cleanup is automatic via tempfile, but we might want to preserve invalid gcode?
-                raise RuntimeError(f"Slicing failed: {e.stderr if e.stderr else e.stdout}")
-
-    def _resolve_profile_names(self, m: str, f: str, q: str) -> tuple[str, str, str]:
-        # Load mappings
-        # Allow passing full names if they don't exist in mapping
-        mapping_path = os.path.join(os.path.dirname(__file__), "profile_mappings.json")
-        try:
-            with open(mapping_path, 'r') as fp:
-                mappings = json.load(fp)
-        except Exception:
-            logger.warning("Could not load profile_mappings.json, using inputs as raw names.")
-            return m, f, q
-            
-        m_real = mappings.get("machine_to_profile", {}).get(m, m)
-        f_real = mappings.get("filament_to_profile", {}).get(f, f)
-        q_real = mappings.get("quality_to_process", {}).get(q, q)
-        
-        return m_real, f_real, q_real
-
-    def _apply_overrides(self, profile: Dict, overrides: Dict) -> Dict:
-        for k, v in overrides.items():
-            # OrcaSlicer values are often strings
-            profile[k] = str(v)
-        return profile
-
-    def _build_slicer_command(self, input_path: str, output_dir: str, m_path: str, p_path: str, f_path: str) -> list:
-        # Settings format: "machine_file;process_file" (filament separate)
-        settings_arg = f"{m_path};{p_path}"
-        
-        return [
-            settings.SLICER_PATH,
-            "--load-settings", settings_arg,
-            "--load-filaments", f_path,
-            "--ensure-on-bed",
-            "--arrange", "1",
-            "--slice", "0",
-            "--outputdir", output_dir,
-            input_path
-        ]
-
-    def _run_command(self, command: list):
-        # logging and running logic similar to before
-        logger.debug(f"Exec: {' '.join(command)}")
-        result = subprocess.run(
-            command,
-            check=False,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-            text=True
-        )
-        if result.returncode != 0:
-            logger.error(f"Slicer Error: {result.stderr}")
-            raise subprocess.CalledProcessError(
-                result.returncode, command, output=result.stdout, stderr=result.stderr
-            )
-
-    def _finalize_output(self, output_dir: str, input_path: str, target_path: str):
-        input_basename = os.path.basename(input_path)
-        expected_name = os.path.splitext(input_basename)[0] + ".gcode"
-        generated_path = os.path.join(output_dir, expected_name)
-
-        if not os.path.exists(generated_path):
-            alt_path = os.path.join(output_dir, "plate_1.gcode")
-            if os.path.exists(alt_path):
-                generated_path = alt_path
-
-        if os.path.exists(generated_path) and generated_path != target_path:
-            shutil.move(generated_path, target_path)
-
-slicer_service = SlicerService()

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

@@ -0,0 +1,18 @@
+package com.printcalculator;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@SpringBootApplication
+@EnableTransactionManagement
+@EnableScheduling
+public class BackendApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(BackendApplication.class, args);
+	}
+
+}

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/controller/CustomQuoteRequestController.java

@@ -0,0 +1,120 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.CustomQuoteRequest;
+import com.printcalculator.entity.CustomQuoteRequestAttachment;
+import com.printcalculator.repository.CustomQuoteRequestAttachmentRepository;
+import com.printcalculator.repository.CustomQuoteRequestRepository;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/custom-quote-requests")
+public class CustomQuoteRequestController {
+
+    private final CustomQuoteRequestRepository requestRepo;
+    private final CustomQuoteRequestAttachmentRepository attachmentRepo;
+    
+    private final com.printcalculator.service.StorageService storageService;
+
+    public CustomQuoteRequestController(CustomQuoteRequestRepository requestRepo,
+                                        CustomQuoteRequestAttachmentRepository attachmentRepo,
+                                        com.printcalculator.service.StorageService storageService) {
+        this.requestRepo = requestRepo;
+        this.attachmentRepo = attachmentRepo;
+        this.storageService = storageService;
+    }
+
+    // 1. Create Custom Quote Request
+    @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<CustomQuoteRequest> createCustomQuoteRequest(
+            @RequestPart("request") com.printcalculator.dto.QuoteRequestDto requestDto,
+            @RequestPart(value = "files", required = false) List<MultipartFile> files
+    ) throws IOException {
+        
+        // 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
+        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;
+                
+                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 ext = getExtension(file.getOriginalFilename());
+                String storedFilename = fileUuid.toString() + "." + ext;
+                
+                // 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);
+                
+                String relativePath = "quote-requests/" + request.getId() + "/attachments/" + attachment.getId() + "/" + storedFilename;
+                attachment.setStoredRelativePath(relativePath);
+                attachmentRepo.save(attachment);
+                
+                // Save file to disk via StorageService
+                storageService.store(file, Paths.get(relativePath));
+            }
+        }
+        
+        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";
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            return filename.substring(i + 1);
+        }
+        return "dat";
+    }
+}

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

@@ -0,0 +1,139 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.dto.OptionsResponse;
+import com.printcalculator.entity.FilamentMaterialType;
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.entity.*; // This line replaces specific entity imports
+import com.printcalculator.repository.FilamentMaterialTypeRepository;
+import com.printcalculator.repository.FilamentVariantRepository;
+import com.printcalculator.repository.LayerHeightOptionRepository;
+import com.printcalculator.repository.NozzleOptionRepository;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+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;
+
+    public OptionsController(FilamentMaterialTypeRepository materialRepo,
+                             FilamentVariantRepository variantRepo,
+                             LayerHeightOptionRepository layerHeightRepo,
+                             NozzleOptionRepository nozzleRepo) {
+        this.materialRepo = materialRepo;
+        this.variantRepo = variantRepo;
+        this.layerHeightRepo = layerHeightRepo;
+        this.nozzleRepo = nozzleRepo;
+    }
+
+    @GetMapping("/api/calculator/options")
+    public ResponseEntity<OptionsResponse> getOptions() {
+        // 1. Materials & Variants
+        List<FilamentMaterialType> types = materialRepo.findAll();
+        List<FilamentVariant> allVariants = variantRepo.findAll();
+
+        List<OptionsResponse.MaterialOption> materialOptions = types.stream()
+                .map(type -> {
+                    List<OptionsResponse.VariantOption> variants = allVariants.stream()
+                            .filter(v -> v.getFilamentMaterialType().getId().equals(type.getId()) && v.getIsActive())
+                            .map(v -> new OptionsResponse.VariantOption(
+                                    v.getVariantDisplayName(),
+                                    v.getColorName(),
+                                    getColorHex(v.getColorName()), // Need helper or store hex in DB
+                                    v.getStockSpools().doubleValue() <= 0
+                            ))
+                            .collect(Collectors.toList());
+
+                    // Only include material if it has active variants
+                    if (variants.isEmpty()) return null;
+
+                    return new OptionsResponse.MaterialOption(
+                            type.getMaterialCode(),
+                            type.getMaterialCode() + (type.getIsFlexible() ? " (Flexible)" : " (Standard)"),
+                            variants
+                    );
+                })
+                .filter(m -> m != null)
+                .collect(Collectors.toList());
+        
+        // Sort: PLA first, then PETG, then others alphabetically
+        materialOptions.sort((a, b) -> {
+            String codeA = a.code();
+            String codeB = b.code();
+            
+            if (codeA.equals("pla_basic")) return -1;
+            if (codeB.equals("pla_basic")) return 1;
+            
+            if (codeA.equals("petg_basic")) return -1;
+            if (codeB.equals("petg_basic")) return 1;
+            
+            return codeA.compareTo(codeB);
+        });
+
+        // 2. Qualities (Static as per user request)
+        List<OptionsResponse.QualityOption> qualities = List.of(
+                new OptionsResponse.QualityOption("draft", "Draft"),
+                new OptionsResponse.QualityOption("standard", "Standard"),
+                new OptionsResponse.QualityOption("extra_fine", "High Definition")
+        );
+
+        // 3. Infill Patterns (Static as per user request)
+        List<OptionsResponse.InfillPatternOption> patterns = List.of(
+                new OptionsResponse.InfillPatternOption("grid", "Grid"),
+                new OptionsResponse.InfillPatternOption("gyroid", "Gyroid"),
+                new OptionsResponse.InfillPatternOption("cubic", "Cubic")
+        );
+
+        // 4. Layer Heights
+        List<OptionsResponse.LayerHeightOptionDTO> layers = layerHeightRepo.findAll().stream()
+                .filter(l -> l.getIsActive())
+                .sorted(Comparator.comparing(LayerHeightOption::getLayerHeightMm))
+                .map(l -> new OptionsResponse.LayerHeightOptionDTO(
+                        l.getLayerHeightMm().doubleValue(),
+                        String.format("%.2f mm", l.getLayerHeightMm())
+                ))
+                .collect(Collectors.toList());
+
+        // 5. Nozzles
+        List<OptionsResponse.NozzleOptionDTO> nozzles = nozzleRepo.findAll().stream()
+                .filter(n -> 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)")
+                ))
+                .collect(Collectors.toList());
+
+        return ResponseEntity.ok(new OptionsResponse(materialOptions, qualities, patterns, layers, nozzles));
+    }
+
+    // Temporary helper until we add hex to DB
+    private String getColorHex(String colorName) {
+        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"; // Default grey
+    }
+}

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

@@ -0,0 +1,258 @@
+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.QrBillService;
+import com.printcalculator.service.StorageService;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.UUID;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.stream.Collectors;
+
+@RestController
+@RequestMapping("/api/orders")
+public class OrderController {
+
+    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;
+
+
+    public OrderController(OrderService orderService,
+                           OrderRepository orderRepo,
+                           OrderItemRepository orderItemRepo,
+                           QuoteSessionRepository quoteSessionRepo,
+                           QuoteLineItemRepository quoteLineItemRepo,
+                           CustomerRepository customerRepo,
+                           StorageService storageService,
+                           InvoicePdfRenderingService invoiceService,
+                           QrBillService qrBillService) {
+        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;
+    }
+
+
+    // 1. Create Order from Quote
+    @PostMapping("/from-quote/{quoteSessionId}")
+    @Transactional
+    public ResponseEntity<OrderDto> createOrderFromQuote(
+            @PathVariable UUID quoteSessionId,
+            @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();
+        if (relativePath == null || relativePath.equals("PENDING")) {
+             String ext = getExtension(file.getOriginalFilename());
+             String storedFilename = UUID.randomUUID().toString() + "." + ext;
+             relativePath = "orders/" + orderId + "/3d-files/" + orderItemId + "/" + storedFilename;
+             item.setStoredRelativePath(relativePath);
+             item.setStoredFilename(storedFilename);
+        }
+        
+        storageService.store(file, Paths.get(relativePath));
+        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());
+    }
+
+    @GetMapping("/{orderId}/invoice")
+    public ResponseEntity<byte[]> getInvoice(@PathVariable UUID orderId) {
+        Order order = orderRepo.findById(orderId)
+                .orElseThrow(() -> new RuntimeException("Order not found"));
+
+        List<OrderItem> items = orderItemRepo.findByOrder_Id(orderId);
+
+        Map<String, Object> vars = new HashMap<>();
+        vars.put("sellerDisplayName", "3D Fab Switzerland");
+        vars.put("sellerAddressLine1", "Sede Ticino, Svizzera");
+        vars.put("sellerAddressLine2", "Sede Bienne, Svizzera");
+        vars.put("sellerEmail", "info@3dfab.ch");
+
+        vars.put("invoiceNumber", "INV-" + order.getId().toString().substring(0, 8).toUpperCase());
+        vars.put("invoiceDate", order.getCreatedAt().format(DateTimeFormatter.ISO_LOCAL_DATE));
+        vars.put("dueDate", order.getCreatedAt().plusDays(7).format(DateTimeFormatter.ISO_LOCAL_DATE));
+
+        String buyerName = order.getBillingCustomerType().equals("BUSINESS") 
+            ? order.getBillingCompanyName() 
+            : order.getBillingFirstName() + " " + order.getBillingLastName();
+        vars.put("buyerDisplayName", buyerName);
+        vars.put("buyerAddressLine1", order.getBillingAddressLine1());
+        vars.put("buyerAddressLine2", order.getBillingZip() + " " + order.getBillingCity() + ", " + order.getBillingCountryCode());
+
+        List<Map<String, Object>> invoiceLineItems = items.stream().map(i -> {
+            Map<String, Object> line = new HashMap<>();
+            line.put("description", "Stampa 3D: " + i.getOriginalFilename());
+            line.put("quantity", i.getQuantity());
+            line.put("unitPriceFormatted", String.format("CHF %.2f", i.getUnitPriceChf()));
+            line.put("lineTotalFormatted", String.format("CHF %.2f", i.getLineTotalChf()));
+            return line;
+        }).collect(Collectors.toList());
+
+        Map<String, Object> setupLine = new HashMap<>();
+        setupLine.put("description", "Costo Setup");
+        setupLine.put("quantity", 1);
+        setupLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+        setupLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+        invoiceLineItems.add(setupLine);
+
+        Map<String, Object> shippingLine = new HashMap<>();
+        shippingLine.put("description", "Spedizione");
+        shippingLine.put("quantity", 1);
+        shippingLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+        shippingLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+        invoiceLineItems.add(shippingLine);
+
+        vars.put("invoiceLineItems", invoiceLineItems);
+        vars.put("subtotalFormatted", String.format("CHF %.2f", order.getSubtotalChf()));
+        vars.put("grandTotalFormatted", String.format("CHF %.2f", order.getTotalChf()));
+        vars.put("paymentTermsText", "Pagamento entro 7 giorni via Bonifico o TWINT. Grazie.");
+
+        String qrBillSvg = new String(qrBillService.generateQrBillSvg(order), java.nio.charset.StandardCharsets.UTF_8);
+        
+        // Strip XML declaration and DOCTYPE if present, as they validity break the embedding HTML page
+        if (qrBillSvg.contains("<?xml")) {
+            int svgStartIndex = qrBillSvg.indexOf("<svg");
+            if (svgStartIndex != -1) {
+                qrBillSvg = qrBillSvg.substring(svgStartIndex);
+            }
+        }
+        
+        byte[] pdf = invoiceService.generateInvoicePdfBytesFromTemplate(vars, qrBillSvg);
+
+        return ResponseEntity.ok()
+                .header("Content-Disposition", "attachment; filename=\"invoice-" + orderId + ".pdf\"")
+                .contentType(MediaType.APPLICATION_PDF)
+                .body(pdf);
+    }
+    
+    private String getExtension(String filename) {
+        if (filename == null) return "stl";
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            return filename.substring(i + 1);
+        }
+        return "stl";
+    }
+
+    private OrderDto convertToDto(Order order, List<OrderItem> items) {
+        OrderDto dto = new OrderDto();
+        dto.setId(order.getId());
+        dto.setStatus(order.getStatus());
+        dto.setCustomerEmail(order.getCustomerEmail());
+        dto.setCustomerPhone(order.getCustomerPhone());
+        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;
+    }
+
+}

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

@@ -0,0 +1,193 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.exception.ModelTooLargeException;
+import com.printcalculator.model.PrintStats;
+import com.printcalculator.model.QuoteResult;
+import com.printcalculator.model.StlBounds;
+import com.printcalculator.repository.PrinterMachineRepository;
+import com.printcalculator.service.QuoteCalculator;
+import com.printcalculator.service.ProfileManager;
+import com.printcalculator.service.SlicerService;
+import com.printcalculator.service.StlService;
+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;
+import java.util.logging.Logger;
+
+@RestController
+public class QuoteController {
+
+    private static final Logger logger = Logger.getLogger(QuoteController.class.getName());
+
+    private final SlicerService slicerService;
+    private final StlService stlService;
+    private final QuoteCalculator quoteCalculator;
+    private final PrinterMachineRepository machineRepo;
+    private final ProfileManager profileManager;
+
+    // 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, StlService stlService, QuoteCalculator quoteCalculator, PrinterMachineRepository machineRepo, ProfileManager profileManager) {
+        this.slicerService = slicerService;
+        this.stlService = stlService;
+        this.quoteCalculator = quoteCalculator;
+        this.machineRepo = machineRepo;
+        this.profileManager = profileManager;
+    }
+
+    @PostMapping("/api/quote")
+    public ResponseEntity<QuoteResult> calculateQuote(
+            @RequestParam("file") MultipartFile file,
+            @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, defaultValue = "false") Boolean supportEnabled
+            ) throws IOException {
+
+        // ... 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 (supportEnabled) {
+                processOverrides.put("support_threshold_angle", "45");
+            }
+        }
+
+        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, nozzleDiameter);
+    }
+
+    @PostMapping("/calculate/stl")
+    public ResponseEntity<QuoteResult> legacyCalculate(
+            @RequestParam("file") MultipartFile file
+    ) throws IOException {
+        // Legacy endpoint uses defaults
+        return processRequest(file, DEFAULT_FILAMENT, DEFAULT_PROCESS, null, null, null);
+    }
+
+    private ResponseEntity<QuoteResult> processRequest(MultipartFile file, String filament, String process,
+                                                       Map<String, String> machineOverrides,
+                                                       Map<String, String> processOverrides,
+                                                       Double nozzleDiameter) throws IOException {
+        if (file.isEmpty()) {
+            return ResponseEntity.badRequest().build();
+        }
+
+        // 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());
+        com.printcalculator.model.StlShiftResult shift = null;
+        try {
+            file.transferTo(tempInput.toFile());
+
+            // Use profile from machine or fallback
+            String slicerMachineProfile = machine.getSlicerMachineProfile();
+            if (slicerMachineProfile == null || slicerMachineProfile.isEmpty()) {
+                slicerMachineProfile = "bambu_a1"; 
+            }
+            slicerMachineProfile = profileManager.resolveMachineProfileName(slicerMachineProfile, nozzleDiameter);
+
+            // Validate model size against machine volume
+            StlBounds bounds = validateModelSize(tempInput.toFile(), machine);
+
+            // Auto-center if needed
+            shift = stlService.shiftToFitIfNeeded(
+                    tempInput.toFile(),
+                    bounds,
+                    machine.getBuildVolumeXMm(),
+                    machine.getBuildVolumeYMm(),
+                    machine.getBuildVolumeZMm()
+            );
+            java.io.File sliceInput = shift.shifted() ? shift.shiftedPath().toFile() : tempInput.toFile();
+            if (shift.shifted()) {
+                logger.info(String.format("Auto-centered STL by offset (mm): x=%.3f y=%.3f z=%.3f",
+                        shift.offsetX(), shift.offsetY(), shift.offsetZ()));
+            }
+
+            PrintStats stats = slicerService.slice(sliceInput, slicerMachineProfile, filament, process, machineOverrides, processOverrides);
+            
+            // Calculate Quote (Pass machine display name for pricing lookup)
+            QuoteResult result = quoteCalculator.calculate(stats, machine.getPrinterDisplayName(), filament);
+            
+            return ResponseEntity.ok(result);
+        } finally {
+            Files.deleteIfExists(tempInput);
+            if (shift != null && shift.shifted()) {
+                try {
+                    Files.deleteIfExists(shift.shiftedPath());
+                } catch (Exception ignored) {}
+            }
+        }
+    }
+
+    private StlBounds validateModelSize(java.io.File stlFile, PrinterMachine machine) throws IOException {
+        StlBounds bounds = stlService.readBounds(stlFile);
+        double x = bounds.sizeX();
+        double y = bounds.sizeY();
+        double z = bounds.sizeZ();
+
+        int bx = machine.getBuildVolumeXMm();
+        int by = machine.getBuildVolumeYMm();
+        int bz = machine.getBuildVolumeZMm();
+
+        logger.info(String.format(
+                "STL bounds (mm): min(%.3f,%.3f,%.3f) max(%.3f,%.3f,%.3f) size(%.3f,%.3f,%.3f) bed(%d,%d,%d)",
+                bounds.minX(), bounds.minY(), bounds.minZ(),
+                bounds.maxX(), bounds.maxY(), bounds.maxZ(),
+                x, y, z, bx, by, bz
+        ));
+
+        double eps = 0.01;
+        boolean fits = (x <= bx + eps && y <= by + eps && z <= bz + eps)
+                || (y <= bx + eps && x <= by + eps && z <= bz + eps);
+
+        if (!fits) {
+            throw new ModelTooLargeException(x, y, z, bx, by, bz);
+        }
+        return bounds;
+    }
+}

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

@@ -0,0 +1,468 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.entity.QuoteLineItem;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.exception.ModelTooLargeException;
+import com.printcalculator.model.PrintStats;
+import com.printcalculator.model.QuoteResult;
+import com.printcalculator.model.StlBounds;
+import com.printcalculator.repository.PrinterMachineRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
+import com.printcalculator.repository.QuoteSessionRepository;
+import com.printcalculator.service.QuoteCalculator;
+import com.printcalculator.service.ProfileManager;
+import com.printcalculator.service.SlicerService;
+import com.printcalculator.service.StlService;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+import java.util.logging.Logger;
+
+@RestController
+@RequestMapping("/api/quote-sessions")
+
+public class QuoteSessionController {
+
+    private static final Logger logger = Logger.getLogger(QuoteSessionController.class.getName());
+
+    private final QuoteSessionRepository sessionRepo;
+    private final QuoteLineItemRepository lineItemRepo;
+    private final SlicerService slicerService;
+    private final StlService stlService;
+    private final QuoteCalculator quoteCalculator;
+    private final ProfileManager profileManager;
+    private final PrinterMachineRepository machineRepo;
+    private final com.printcalculator.repository.PricingPolicyRepository pricingRepo;
+    private final com.printcalculator.service.StorageService storageService;
+
+    // Defaults
+    private static final String DEFAULT_FILAMENT = "pla_basic";
+    private static final String DEFAULT_PROCESS = "standard";
+
+    public QuoteSessionController(QuoteSessionRepository sessionRepo,
+                                  QuoteLineItemRepository lineItemRepo,
+                                  SlicerService slicerService,
+                                  StlService stlService,
+                                  QuoteCalculator quoteCalculator,
+                                  ProfileManager profileManager,
+                                  PrinterMachineRepository machineRepo,
+                                  com.printcalculator.repository.PricingPolicyRepository pricingRepo,
+                                  com.printcalculator.service.StorageService storageService) {
+        this.sessionRepo = sessionRepo;
+        this.lineItemRepo = lineItemRepo;
+        this.slicerService = slicerService;
+        this.stlService = stlService;
+        this.quoteCalculator = quoteCalculator;
+        this.profileManager = profileManager;
+        this.machineRepo = machineRepo;
+        this.pricingRepo = pricingRepo;
+        this.storageService = storageService;
+    }
+
+    // 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_basic"); 
+        session.setSupportsEnabled(false);
+        session.setCreatedAt(OffsetDateTime.now());
+        session.setExpiresAt(OffsetDateTime.now().plusDays(30)); 
+        
+        var policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
+        session.setSetupCostChf(policy != null ? policy.getFixedJobFeeChf() : BigDecimal.ZERO);
+        
+        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");
+
+        // 1. Define Persistent Storage Path
+        // Structure: quotes/{sessionId}/{uuid}.{ext} (inside storage root)
+        
+        String originalFilename = file.getOriginalFilename();
+        String ext = originalFilename != null && originalFilename.contains(".") 
+                     ? originalFilename.substring(originalFilename.lastIndexOf(".")) 
+                     : ".stl";
+        
+        String storedFilename = UUID.randomUUID() + ext;
+        Path relativePath = Paths.get("quotes", session.getId().toString(), storedFilename);
+        
+        // Save file
+        storageService.store(file, relativePath);
+        
+        // Resolve absolute path for slicing and storage usage
+        Path persistentPath = storageService.loadAsResource(relativePath).getFile().toPath();
+
+        com.printcalculator.model.StlShiftResult shift = null;
+        try {
+            // Apply Basic/Advanced Logic
+            applyPrintSettings(settings);
+
+            // REAL SLICING
+            // 1. Pick Machine (default to first active or specific)
+            PrinterMachine machine = machineRepo.findFirstByIsActiveTrue()
+                    .orElseThrow(() -> new RuntimeException("No active printer found"));
+
+            // 2. Validate model size against machine volume
+            StlBounds bounds = validateModelSize(persistentPath.toFile(), machine);
+
+            // 2b. Auto-center if needed (keeps the stored STL unchanged)
+            shift = stlService.shiftToFitIfNeeded(
+                    persistentPath.toFile(),
+                    bounds,
+                    machine.getBuildVolumeXMm(),
+                    machine.getBuildVolumeYMm(),
+                    machine.getBuildVolumeZMm()
+            );
+            java.io.File sliceInput = shift.shifted() ? shift.shiftedPath().toFile() : persistentPath.toFile();
+            if (shift.shifted()) {
+                logger.info(String.format("Auto-centered STL by offset (mm): x=%.3f y=%.3f z=%.3f",
+                        shift.offsetX(), shift.offsetY(), shift.offsetZ()));
+            }
+            
+            // 3. Pick Profiles
+            String machineProfile = machine.getSlicerMachineProfile();
+            if (machineProfile == null || machineProfile.isBlank()) {
+                machineProfile = machine.getPrinterDisplayName(); // e.g. "Bambu Lab A1 0.4 nozzle"
+            }
+            if (machineProfile == null || machineProfile.isBlank()) {
+                machineProfile = "bambu_a1"; // final fallback (alias handled in ProfileManager)
+            }
+            machineProfile = profileManager.resolveMachineProfileName(machineProfile, settings.getNozzleDiameter());
+            
+            String filamentProfile = "Generic " + (settings.getMaterial() != null ? settings.getMaterial().toUpperCase() : "PLA");
+            // Mapping: "pla_basic" -> "Generic PLA", "petg_basic" -> "Generic PETG"
+            if (settings.getMaterial() != null) {
+                if (settings.getMaterial().toLowerCase().contains("pla")) filamentProfile = "Generic PLA";
+                else if (settings.getMaterial().toLowerCase().contains("petg")) filamentProfile = "Generic PETG";
+                else if (settings.getMaterial().toLowerCase().contains("tpu")) filamentProfile = "Generic TPU";
+                else if (settings.getMaterial().toLowerCase().contains("abs")) filamentProfile = "Generic ABS";
+                
+                // Update Session Material
+                session.setMaterialCode(settings.getMaterial());
+            } else {
+                 // Fallback if null?
+                 session.setMaterialCode("pla_basic");
+            }
+            
+            // Update Session Settings for Persistence
+            if (settings.getNozzleDiameter() != null) session.setNozzleDiameterMm(BigDecimal.valueOf(settings.getNozzleDiameter()));
+            if (settings.getLayerHeight() != null) session.setLayerHeightMm(BigDecimal.valueOf(settings.getLayerHeight()));
+            if (settings.getInfillDensity() != null) session.setInfillPercent(settings.getInfillDensity().intValue());
+            if (settings.getInfillPattern() != null) session.setInfillPattern(settings.getInfillPattern());
+            if (settings.getSupportsEnabled() != null) session.setSupportsEnabled(settings.getSupportsEnabled());
+            if (settings.getNotes() != null) session.setNotes(settings.getNotes());
+            
+            // Save session updates
+            sessionRepo.save(session);
+
+            String processProfile = "0.20mm Standard @BBL A1"; 
+            // Mapping quality to process
+            // "standard" -> "0.20mm Standard @BBL A1"
+            // "draft" -> "0.28mm Extra Draft @BBL A1"
+            // "high" -> "0.12mm Fine @BBL A1" (approx names, need to be exact for Orca)
+            // Let's use robust defaults or simple overrides
+            if (settings.getLayerHeight() != null) {
+                 if (settings.getLayerHeight() >= 0.28) processProfile = "0.28mm Extra Draft @BBL A1";
+                 else if (settings.getLayerHeight() <= 0.12) processProfile = "0.12mm Fine @BBL A1";
+            }
+            
+            // Build overrides map from settings
+            // 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());
+            if (settings.getSupportsEnabled() != null) {
+                processOverrides.put("enable_support", settings.getSupportsEnabled() ? "1" : "0");
+                // If enabled, use a more permissive threshold (45 deg) by default
+                // to avoid expensive supports on things that don't strictly need them
+                if (settings.getSupportsEnabled()) {
+                    processOverrides.put("support_threshold_angle", "45");
+                }
+            }
+            
+            Map<String, String> machineOverrides = new HashMap<>();
+            if (settings.getNozzleDiameter() != null) {
+                machineOverrides.put("nozzle_diameter", String.valueOf(settings.getNozzleDiameter()));
+            }
+
+            // 4. Slice (Use persistent path)
+            PrintStats stats = slicerService.slice(
+                sliceInput, 
+                machineProfile, 
+                filamentProfile, 
+                processProfile, 
+                machineOverrides, // machine overrides
+                processOverrides
+            );
+            
+            // 5. Calculate Quote
+            QuoteResult result = quoteCalculator.calculate(stats, machine.getPrinterDisplayName(), filamentProfile);
+
+            // 6. Create Line Item
+            QuoteLineItem item = new QuoteLineItem();
+            item.setQuoteSession(session);
+            item.setOriginalFilename(file.getOriginalFilename());
+            item.setStoredPath(persistentPath.toString()); // SAVE PATH
+            item.setQuantity(1);
+            item.setColorCode(settings.getColor() != null ? settings.getColor() : "#FFFFFF");
+            item.setStatus("READY"); // or CALCULATED
+            
+            item.setPrintTimeSeconds((int) stats.getPrintTimeSeconds());
+            item.setMaterialGrams(BigDecimal.valueOf(stats.getFilamentWeightGrams()));
+            item.setUnitPriceChf(BigDecimal.valueOf(result.getTotalPrice()));
+            
+            // Store breakdown
+            Map<String, Object> breakdown = new HashMap<>();
+            breakdown.put("machine_cost", result.getTotalPrice() - result.getSetupCost()); // Approximation? 
+            // Better: QuoteResult could expose detailed breakdown. For now just storing what we have.
+            breakdown.put("setup_fee", result.getSetupCost());
+            item.setPricingBreakdown(breakdown);
+            
+            // Dimensions from STL
+            item.setBoundingBoxXMm(BigDecimal.valueOf(bounds.sizeX()));
+            item.setBoundingBoxYMm(BigDecimal.valueOf(bounds.sizeY()));
+            item.setBoundingBoxZMm(BigDecimal.valueOf(bounds.sizeZ()));
+            
+            item.setCreatedAt(OffsetDateTime.now());
+            item.setUpdatedAt(OffsetDateTime.now());
+            
+            return lineItemRepo.save(item);
+
+        } catch (Exception e) {
+            // Cleanup if failed
+            try {
+                storageService.delete(Paths.get("quotes", session.getId().toString(), storedFilename));
+            } catch (Exception ignored) {}
+            throw e;
+        } finally {
+            if (shift != null && shift.shifted()) {
+                try {
+                    Files.deleteIfExists(shift.shiftedPath());
+                } catch (Exception ignored) {}
+            }
+        }
+    }
+
+    private StlBounds validateModelSize(java.io.File stlFile, PrinterMachine machine) throws IOException {
+        StlBounds bounds = stlService.readBounds(stlFile);
+        double x = bounds.sizeX();
+        double y = bounds.sizeY();
+        double z = bounds.sizeZ();
+
+        int bx = machine.getBuildVolumeXMm();
+        int by = machine.getBuildVolumeYMm();
+        int bz = machine.getBuildVolumeZMm();
+
+        logger.info(String.format(
+                "STL bounds (mm): min(%.3f,%.3f,%.3f) max(%.3f,%.3f,%.3f) size(%.3f,%.3f,%.3f) bed(%d,%d,%d)",
+                bounds.minX(), bounds.minY(), bounds.minZ(),
+                bounds.maxX(), bounds.maxY(), bounds.maxZ(),
+                x, y, z, bx, by, bz
+        ));
+
+        double eps = 0.01;
+        boolean fits = (x <= bx + eps && y <= by + eps && z <= bz + eps)
+                || (y <= bx + eps && x <= by + eps && z <= bz + eps);
+
+        if (!fits) {
+            throw new ModelTooLargeException(x, y, z, bx, by, bz);
+        }
+        return bounds;
+    }
+
+    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");
+                    if (settings.getNozzleDiameter() == null) settings.setNozzleDiameter(0.4);
+                    break;
+                case "high":
+                    settings.setLayerHeight(0.12);
+                    settings.setInfillDensity(20.0);
+                    settings.setInfillPattern("gyroid");
+                    if (settings.getNozzleDiameter() == null) settings.setNozzleDiameter(0.4);
+                    break;
+                case "standard":
+                default:
+                    settings.setLayerHeight(0.20);
+                    settings.setInfillDensity(20.0);
+                    settings.setInfillPattern("grid");
+                    if (settings.getNozzleDiameter() == null) settings.setNozzleDiameter(0.4);
+                    break;
+            }
+            if (settings.getSupportsEnabled() == null) settings.setSupportsEnabled(false);
+        } 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");
+            if (settings.getNozzleDiameter() == null) settings.setNozzleDiameter(0.4);
+            if (settings.getSupportsEnabled() == null) settings.setSupportsEnabled(false);
+        }
+    }
+
+    // 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
+        BigDecimal itemsTotal = BigDecimal.ZERO;
+        for (QuoteLineItem item : items) {
+            BigDecimal lineTotal = item.getUnitPriceChf().multiply(BigDecimal.valueOf(item.getQuantity()));
+            itemsTotal = itemsTotal.add(lineTotal);
+        }
+        
+        BigDecimal setupFee = session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO;
+        BigDecimal grandTotal = itemsTotal.add(setupFee);
+        
+        Map<String, Object> response = new HashMap<>();
+        response.put("session", session);
+        response.put("items", items);
+        response.put("itemsTotalChf", itemsTotal);
+        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 = Paths.get(item.getStoredPath());
+        // Since storedPath is absolute, we can't directly use loadAsResource with it unless we resolve relative.
+        // But loadAsResource expects relative path?
+        // Actually FileSystemStorageService.loadAsResource uses rootLocation.resolve(path).
+        // If path is absolute, resolve might fail or behave weirdly.
+        // But wait, we stored absolute path in DB: item.setStoredPath(persistentPath.toString());
+        // If we want to use storageService.loadAsResource, we need the relative path.
+        // Or we just access the file directly if we trust the absolute path.
+        // But we want to use StorageService abstraction.
+        
+        // Option 1: Reconstruct relative path.
+        // We know structure: quotes/{sessionId}/{filename}... 
+        // But filename is UUID+ext. We don't have storedFilename in QuoteLineItem easily?
+        // QuoteLineItem doesn't seem to have storedFilename field, only storedPath.
+        
+        // If we trust the file is on disk, we can use UrlResource directly here as before,
+        // relying on the fact that storedPath is the absolute path to the file.
+        // But we should verify it exists.
+        
+        if (!Files.exists(path)) {
+            return ResponseEntity.notFound().build();
+        }
+
+        org.springframework.core.io.Resource resource = new org.springframework.core.io.UrlResource(path.toUri());
+
+        return ResponseEntity.ok()
+                .contentType(MediaType.APPLICATION_OCTET_STREAM)
+                .header(org.springframework.http.HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + item.getOriginalFilename() + "\"")
+                .body(resource);
+    }
+}

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/CreateOrderRequest.java

@@ -0,0 +1,11 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+
+@Data
+public class CreateOrderRequest {
+    private CustomerDto customer;
+    private AddressDto billingAddress;
+    private AddressDto shippingAddress;
+    private boolean shippingSameAsBilling;
+}

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 +1,18 @@
+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(String name, String colorName, String hexColor, 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 +1,74 @@
+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 status;
+    private String customerEmail;
+    private String customerPhone;
+    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 List<OrderItemDto> items;
+
+    // Getters and Setters
+    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 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 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 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 +1,24 @@
+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", "PETG"
+    private String color;    // e.g. "White", "#FFFFFF"
+    
+    // Basic Mode
+    private String quality;  // "draft", "standard", "high"
+    
+    // Advanced Mode (Optional in Basic)
+    private Double layerHeight;
+    private Double infillDensity;
+    private String infillPattern;
+    private Boolean supportsEnabled = true;
+    private Double nozzleDiameter;
+    private String notes;
+}

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

@@ -0,0 +1,15 @@
+package com.printcalculator.dto;
+
+import lombok.Data;
+
+@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;
+}

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 +1,142 @@
+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;
+
+    @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 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/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/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 +1,414 @@
+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("'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;
+    }
+
+    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 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 +1,198 @@
+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;
+
+    @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 = "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;
+
+    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 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;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+}

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

@@ -0,0 +1,146 @@
+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 = "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 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 +1,127 @@
+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;
+
+    @Column(name = "slicer_machine_profile")
+    private String slicerMachineProfile;
+
+    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 String getSlicerMachineProfile() {
+        return slicerMachineProfile;
+    }
+
+    public void setSlicerMachineProfile(String slicerMachineProfile) {
+        this.slicerMachineProfile = slicerMachineProfile;
+    }
+
+    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/QuoteLineItem.java

@@ -0,0 +1,215 @@
+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;
+
+    @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 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/exception/GlobalExceptionHandler.java

@@ -0,0 +1,71 @@
+package com.printcalculator.exception;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.multipart.MaxUploadSizeExceededException;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+@ControllerAdvice
+@Slf4j
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(StorageException.class)
+    public ResponseEntity<?> handleStorageException(StorageException exc) {
+        // Log the full exception for internal debugging
+        log.error("Storage Exception occurred", exc);
+        
+        Map<String, String> response = new HashMap<>();
+
+        // Check for specific virus case
+        if (exc.getMessage() != null && exc.getMessage().contains("antivirus scanner")) {
+             response.put("error", "Security Violation");
+             // Safe message for client
+             response.put("message", "File rejected by security policy.");
+             response.put("code", "VIRUS_DETECTED");
+             return ResponseEntity.status(HttpStatus.UNPROCESSABLE_ENTITY).body(response);
+        }
+
+        // Generic fallback for other storage errors to avoid leaking internal paths/details
+        response.put("error", "Storage Operation Failed");
+        response.put("message", "Unable to process the file upload.");
+        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(response);
+    }
+
+    @ExceptionHandler(MaxUploadSizeExceededException.class)
+    public ResponseEntity<?> handleMaxSizeException(MaxUploadSizeExceededException exc) {
+        Map<String, String> response = new HashMap<>();
+        response.put("error", "File too large");
+        response.put("message", "The uploaded file exceeds the maximum allowed size.");
+        return ResponseEntity.status(HttpStatus.PAYLOAD_TOO_LARGE).body(response);
+    }
+
+    @ExceptionHandler(ModelTooLargeException.class)
+    public ResponseEntity<?> handleModelTooLarge(ModelTooLargeException exc) {
+        Map<String, String> response = new HashMap<>();
+        response.put("error", "Model too large");
+        response.put("code", "MODEL_TOO_LARGE");
+        response.put("message", String.format(
+                "Model size %.2fx%.2fx%.2f mm exceeds build volume %dx%dx%d mm.",
+                exc.getModelX(), exc.getModelY(), exc.getModelZ(),
+                exc.getBuildX(), exc.getBuildY(), exc.getBuildZ()
+        ));
+        response.put("model_x_mm", formatMm(exc.getModelX()));
+        response.put("model_y_mm", formatMm(exc.getModelY()));
+        response.put("model_z_mm", formatMm(exc.getModelZ()));
+        response.put("build_x_mm", String.valueOf(exc.getBuildX()));
+        response.put("build_y_mm", String.valueOf(exc.getBuildY()));
+        response.put("build_z_mm", String.valueOf(exc.getBuildZ()));
+        return ResponseEntity.unprocessableEntity().body(response);
+    }
+
+    private String formatMm(double value) {
+        return BigDecimal.valueOf(value).setScale(2, RoundingMode.HALF_UP).toPlainString();
+    }
+}

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

@@ -0,0 +1,45 @@
+package com.printcalculator.exception;
+
+public class ModelTooLargeException extends RuntimeException {
+    private final double modelX;
+    private final double modelY;
+    private final double modelZ;
+    private final int buildX;
+    private final int buildY;
+    private final int buildZ;
+
+    public ModelTooLargeException(double modelX, double modelY, double modelZ,
+                                  int buildX, int buildY, int buildZ) {
+        super("Model size exceeds build volume");
+        this.modelX = modelX;
+        this.modelY = modelY;
+        this.modelZ = modelZ;
+        this.buildX = buildX;
+        this.buildY = buildY;
+        this.buildZ = buildZ;
+    }
+
+    public double getModelX() {
+        return modelX;
+    }
+
+    public double getModelY() {
+        return modelY;
+    }
+
+    public double getModelZ() {
+        return modelZ;
+    }
+
+    public int getBuildX() {
+        return buildX;
+    }
+
+    public int getBuildY() {
+        return buildY;
+    }
+
+    public int getBuildZ() {
+        return buildZ;
+    }
+}

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/model/PrintStats.java

@@ -0,0 +1,29 @@
+package com.printcalculator.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class PrintStats {
+    private long printTimeSeconds;
+    private String printTimeFormatted;
+    private double filamentWeightGrams;
+    private double filamentLengthMm;
+    
+    // Breakdown if available
+    private Double modelWeightGrams;
+    private Double supportWeightGrams;
+
+    // Legacy constructor for compatibility
+    public PrintStats(long printTimeSeconds, String printTimeFormatted, double filamentWeightGrams, double filamentLengthMm) {
+        this.printTimeSeconds = printTimeSeconds;
+        this.printTimeFormatted = printTimeFormatted;
+        this.filamentWeightGrams = filamentWeightGrams;
+        this.filamentLengthMm = filamentLengthMm;
+    }
+}

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

@@ -0,0 +1,31 @@
+package com.printcalculator.model;
+
+public class QuoteResult {
+    private double totalPrice;
+    private String currency;
+    private PrintStats stats;
+    private double setupCost;
+
+    public QuoteResult(double totalPrice, String currency, PrintStats stats, double setupCost) {
+        this.totalPrice = totalPrice;
+        this.currency = currency;
+        this.stats = stats;
+        this.setupCost = setupCost;
+    }
+
+    public double getTotalPrice() {
+        return totalPrice;
+    }
+
+    public String getCurrency() {
+        return currency;
+    }
+
+    public PrintStats getStats() {
+        return stats;
+    }
+    
+    public double getSetupCost() {
+        return setupCost;
+    }
+}

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

@@ -0,0 +1,16 @@
+package com.printcalculator.model;
+
+public record StlBounds(double minX, double minY, double minZ,
+                        double maxX, double maxY, double maxZ) {
+    public double sizeX() {
+        return maxX - minX;
+    }
+
+    public double sizeY() {
+        return maxY - minY;
+    }
+
+    public double sizeZ() {
+        return maxZ - minZ;
+    }
+}

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

@@ -0,0 +1,10 @@
+package com.printcalculator.model;
+
+import java.nio.file.Path;
+
+public record StlShiftResult(Path shiftedPath,
+                             double offsetX,
+                             double offsetY,
+                             double offsetZ,
+                             boolean shifted) {
+}

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

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

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/FilamentVariantRepository.java

@@ -0,0 +1,13 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.FilamentVariant;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.printcalculator.entity.FilamentMaterialType;
+import java.util.Optional;
+
+public interface FilamentVariantRepository extends JpaRepository<FilamentVariant, Long> {
+    // We try to match by color name if possible, or get first active
+    Optional<FilamentVariant> findByFilamentMaterialTypeAndColorName(FilamentMaterialType type, String colorName);
+    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/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 +1,11 @@
+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);
+}

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

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

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

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

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/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 +1,11 @@
+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);
+}

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

@@ -0,0 +1,11 @@
+package com.printcalculator.repository;
+
+import com.printcalculator.entity.QuoteSession;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface QuoteSessionRepository extends JpaRepository<QuoteSession, UUID> {
+    List<QuoteSession> findByCreatedAtBefore(java.time.OffsetDateTime cutoff);
+}

backend/src/main/java/com/printcalculator/service/ClamAVService.java

@@ -0,0 +1,64 @@
+package com.printcalculator.service;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import xyz.capybara.clamav.ClamavClient;
+import xyz.capybara.clamav.commands.scan.result.ScanResult;
+
+import java.io.InputStream;
+import java.util.Collection;
+import java.util.Map;
+
+@Service
+public class ClamAVService {
+
+    private static final Logger logger = LoggerFactory.getLogger(ClamAVService.class);
+
+    private final ClamavClient clamavClient;
+    private final boolean enabled;
+
+    public ClamAVService(
+            @Value("${clamav.host:clamav}") String host,
+            @Value("${clamav.port:3310}") int port,
+            @Value("${clamav.enabled:false}") boolean enabled
+    ) {
+        this.enabled = enabled;
+        if (!enabled) {
+            logger.info("ClamAV is DISABLED");
+            this.clamavClient = null;
+            return;
+        }
+        logger.info("Initializing ClamAV client at {}:{}", host, port);
+        ClamavClient client = null;
+        try {
+            client = new ClamavClient(host, port);
+        } catch (Exception e) {
+            logger.error("Failed to initialize ClamAV client: " + e.getMessage());
+        }
+        this.clamavClient = client;
+    }
+
+    public boolean scan(InputStream inputStream) {
+        if (!enabled || clamavClient == null) {
+            return true;
+        }
+        try {
+            ScanResult result = clamavClient.scan(inputStream);
+            if (result instanceof ScanResult.OK) {
+                return true;
+            } else if (result instanceof ScanResult.VirusFound) {
+                Map<String, Collection<String>> viruses = ((ScanResult.VirusFound) result).getFoundViruses();
+                logger.warn("VIRUS DETECTED: {}", viruses);
+                return false;
+            } else {
+                logger.warn("Unknown scan result: {}. Allowing file (FAIL-OPEN)", result);
+                return true;
+            }
+        } catch (Exception e) {
+            logger.error("Error scanning file with ClamAV. Allowing file (FAIL-OPEN)", e);
+            return true;
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/FileSystemStorageService.java

@@ -0,0 +1,94 @@
+package com.printcalculator.service;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+import com.printcalculator.exception.StorageException;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+
+@Service
+public class FileSystemStorageService implements StorageService {
+
+    private final Path rootLocation;
+    private final ClamAVService clamAVService;
+
+    public FileSystemStorageService(@Value("${storage.location:storage_orders}") String storageLocation, ClamAVService clamAVService) {
+        this.rootLocation = Paths.get(storageLocation);
+        this.clamAVService = clamAVService;
+    }
+
+    @Override
+    public void init() {
+        try {
+            Files.createDirectories(rootLocation);
+        } catch (IOException e) {
+            throw new StorageException("Could not initialize storage", e);
+        }
+    }
+
+    @Override
+    public void store(MultipartFile file, Path destinationRelativePath) throws IOException {
+        Path destinationFile = this.rootLocation.resolve(destinationRelativePath).normalize().toAbsolutePath();
+        if (!destinationFile.getParent().startsWith(this.rootLocation.toAbsolutePath())) {
+            throw new StorageException("Cannot store file outside current directory.");
+        }
+
+        // 1. Salva prima il file su disco per evitare problemi di stream con file grandi
+        Files.createDirectories(destinationFile.getParent());
+        file.transferTo(destinationFile.toFile());
+
+        // 2. Scansiona il file appena salvato aprendo un nuovo stream
+        try (InputStream inputStream = new FileInputStream(destinationFile.toFile())) {
+            if (!clamAVService.scan(inputStream)) {
+                // Se infetto, cancella il file e solleva eccezione
+                Files.deleteIfExists(destinationFile);
+                throw new StorageException("File rejected by antivirus scanner.");
+            }
+        } catch (Exception e) {
+            if (e instanceof StorageException) throw e;
+            // Se l'antivirus fallisce per motivi tecnici, lasciamo il file (fail-open come concordato)
+        }
+    }
+
+    @Override
+    public void store(Path source, Path destinationRelativePath) throws IOException {
+        Path destinationFile = this.rootLocation.resolve(destinationRelativePath).normalize().toAbsolutePath();
+        if (!destinationFile.getParent().startsWith(this.rootLocation.toAbsolutePath())) {
+             throw new StorageException("Cannot store file outside current directory.");
+        }
+        Files.createDirectories(destinationFile.getParent());
+        Files.copy(source, destinationFile, StandardCopyOption.REPLACE_EXISTING);
+    }
+
+    @Override
+    public void delete(Path path) throws IOException {
+        Path file = rootLocation.resolve(path);
+        Files.deleteIfExists(file);
+    }
+
+    @Override
+    public Resource loadAsResource(Path path) throws IOException {
+        try {
+            Path file = rootLocation.resolve(path);
+            Resource resource = new UrlResource(file.toUri());
+            if (resource.exists() || resource.isReadable()) {
+                return resource;
+            } else {
+                throw new RuntimeException("Could not read file: " + path);
+            }
+        } catch (MalformedURLException e) {
+            throw new RuntimeException("Could not read file: " + path, e);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/GCodeParser.java

@@ -0,0 +1,171 @@
+package com.printcalculator.service;
+
+import com.printcalculator.model.PrintStats;
+import org.springframework.stereotype.Service;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+@Service
+public class GCodeParser {
+
+    // OrcaSlicer/BambuStudio format
+    // ; estimated printing time = 1h 2m 3s
+    // ; filament used [g] = 12.34
+    // ; filament used [mm] = 1234.56
+    private static final Pattern TOTAL_ESTIMATED_TIME_PATTERN = Pattern.compile(
+            ";\\s*.*total\\s+estimated\\s+time\\s*[:=]\\s*([^;]+)",
+            Pattern.CASE_INSENSITIVE);
+    private static final Pattern MODEL_PRINTING_TIME_PATTERN = Pattern.compile(
+            ";\\s*.*model\\s+printing\\s+time\\s*[:=]\\s*([^;]+)",
+            Pattern.CASE_INSENSITIVE);
+    private static final Pattern TIME_PATTERN = Pattern.compile(
+            ";\\s*(?:estimated\\s+printing\\s+time|estimated\\s+print\\s+time|print\\s+time).*?[:=]\\s*(.*)",
+            Pattern.CASE_INSENSITIVE);
+    private static final Pattern FILAMENT_G_PATTERN = Pattern.compile(";\\s*filament used \\[g\\]\\s*=\\s*([^;\\(\\n\\r]+)(?:\\s*\\(([^,]+) model,\\s*([^ ]+) support\\))?");
+    private static final Pattern FILAMENT_MM_PATTERN = Pattern.compile(";\\s*filament used \\[mm\\]\\s*=\\s*(.*)");
+
+    public PrintStats parse(File gcodeFile) throws IOException {
+        long seconds = 0;
+        double weightG = 0;
+        double lengthMm = 0;
+        Double modelWeightG = null;
+        Double supportWeightG = null;
+        String timeFormatted = "";
+
+        try (BufferedReader reader = new BufferedReader(new FileReader(gcodeFile))) {
+            String line;
+
+            // Scan entire file as metadata is often at the end
+            while ((line = reader.readLine()) != null) {
+                line = line.trim();
+                
+                // OrcaSlicer comments start with ;
+                if (!line.startsWith(";")) {
+                    continue;
+                }
+
+                if (line.toLowerCase().contains("estimated printing time")) {
+                    System.out.println("DEBUG: Found potential time line: '" + line + "'");
+                }
+
+                Matcher totalTimeMatcher = TOTAL_ESTIMATED_TIME_PATTERN.matcher(line);
+                if (totalTimeMatcher.find()) {
+                    timeFormatted = totalTimeMatcher.group(1).trim();
+                    seconds = parseTimeString(timeFormatted);
+                    System.out.println("GCodeParser: Found total estimated time: " + timeFormatted + " (" + seconds + "s)");
+                    continue;
+                }
+
+                Matcher modelTimeMatcher = MODEL_PRINTING_TIME_PATTERN.matcher(line);
+                if (modelTimeMatcher.find()) {
+                    timeFormatted = modelTimeMatcher.group(1).trim();
+                    seconds = parseTimeString(timeFormatted);
+                    System.out.println("GCodeParser: Found model printing time: " + timeFormatted + " (" + seconds + "s)");
+                    continue;
+                }
+
+                Matcher timeMatcher = TIME_PATTERN.matcher(line);
+                if (timeMatcher.find()) {
+                    timeFormatted = timeMatcher.group(1).trim();
+                    seconds = parseTimeString(timeFormatted);
+                    System.out.println("GCodeParser: Found time: " + timeFormatted + " (" + seconds + "s)");
+                }
+
+                Matcher weightMatcher = FILAMENT_G_PATTERN.matcher(line);
+                if (weightMatcher.find()) {
+                    try {
+                        weightG = Double.parseDouble(weightMatcher.group(1).trim());
+                        System.out.println("GCodeParser: Found total weight: " + weightG + "g");
+                        
+                        // Check if we have groups 2 and 3 for breakdown
+                        if (weightMatcher.groupCount() >= 3 && weightMatcher.group(2) != null) {
+                            modelWeightG = Double.parseDouble(weightMatcher.group(2).trim());
+                            supportWeightG = Double.parseDouble(weightMatcher.group(3).trim());
+                            System.out.println("GCodeParser: Found breakdown - Model: " + modelWeightG + "g, Support: " + supportWeightG + "g");
+                        }
+                    } catch (NumberFormatException ignored) {}
+                }
+                
+                Matcher lengthMatcher = FILAMENT_MM_PATTERN.matcher(line);
+                if (lengthMatcher.find()) {
+                    try {
+                        lengthMm = Double.parseDouble(lengthMatcher.group(1).trim());
+                         System.out.println("GCodeParser: Found length: " + lengthMm + "mm");
+                    } catch (NumberFormatException ignored) {}
+                }
+            }
+        }
+        
+        return PrintStats.builder()
+                .printTimeSeconds(seconds)
+                .printTimeFormatted(timeFormatted)
+                .filamentWeightGrams(weightG)
+                .filamentLengthMm(lengthMm)
+                .modelWeightGrams(modelWeightG)
+                .supportWeightGrams(supportWeightG)
+                .build();
+    }
+
+    private long parseTimeString(String timeStr) {
+        // Formats: "1d 2h 3m 4s", "1h 20m 10s", "01:23:45", "12:34"
+        String lower = timeStr.toLowerCase();
+        double totalSeconds = 0;
+        boolean matched = false;
+
+        Matcher d = Pattern.compile("(\\d+(?:\\.\\d+)?)\\s*d").matcher(lower);
+        if (d.find()) {
+            totalSeconds += Double.parseDouble(d.group(1)) * 86400;
+            matched = true;
+        }
+
+        Matcher h = Pattern.compile("(\\d+(?:\\.\\d+)?)\\s*h").matcher(lower);
+        if (h.find()) {
+            totalSeconds += Double.parseDouble(h.group(1)) * 3600;
+            matched = true;
+        }
+
+        Matcher m = Pattern.compile("(\\d+(?:\\.\\d+)?)\\s*m").matcher(lower);
+        if (m.find()) {
+            totalSeconds += Double.parseDouble(m.group(1)) * 60;
+            matched = true;
+        }
+
+        Matcher s = Pattern.compile("(\\d+(?:\\.\\d+)?)\\s*s").matcher(lower);
+        if (s.find()) {
+            totalSeconds += Double.parseDouble(s.group(1));
+            matched = true;
+        }
+
+        if (matched) {
+            return Math.round(totalSeconds);
+        }
+
+        long daySeconds = 0;
+        Matcher dayPrefix = Pattern.compile("(\\d+)\\s*d").matcher(lower);
+        if (dayPrefix.find()) {
+            daySeconds = Long.parseLong(dayPrefix.group(1)) * 86400;
+        }
+
+        Matcher hms = Pattern.compile("(\\d{1,2}):(\\d{2}):(\\d{2})").matcher(lower);
+        if (hms.find()) {
+            long hours = Long.parseLong(hms.group(1));
+            long minutes = Long.parseLong(hms.group(2));
+            long seconds = Long.parseLong(hms.group(3));
+            return daySeconds + hours * 3600 + minutes * 60 + seconds;
+        }
+
+        Matcher ms = Pattern.compile("(\\d{1,2}):(\\d{2})").matcher(lower);
+        if (ms.find()) {
+            long minutes = Long.parseLong(ms.group(1));
+            long seconds = Long.parseLong(ms.group(2));
+            return daySeconds + minutes * 60 + seconds;
+        }
+
+        return 0;
+    }
+}

backend/src/main/java/com/printcalculator/service/InvoicePdfRenderingService.java

@@ -0,0 +1,48 @@
+package com.printcalculator.service;
+
+import com.openhtmltopdf.pdfboxout.PdfRendererBuilder;
+import com.openhtmltopdf.svgsupport.BatikSVGDrawer;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Service;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.Context;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Locale;
+import java.util.Map;
+
+@Service
+public class InvoicePdfRenderingService {
+
+    private final TemplateEngine thymeleafTemplateEngine;
+
+    public InvoicePdfRenderingService(TemplateEngine thymeleafTemplateEngine) {
+        this.thymeleafTemplateEngine = thymeleafTemplateEngine;
+    }
+
+    public byte[] generateInvoicePdfBytesFromTemplate(Map<String, Object> invoiceTemplateVariables, String qrBillSvg) {
+        try {
+            Context thymeleafContextWithInvoiceData = new Context(Locale.ITALY);
+            thymeleafContextWithInvoiceData.setVariables(invoiceTemplateVariables);
+            thymeleafContextWithInvoiceData.setVariable("qrBillSvg", qrBillSvg);
+
+            String renderedInvoiceHtml = thymeleafTemplateEngine.process("invoice", thymeleafContextWithInvoiceData);
+
+            String classpathBaseUrlForHtmlResources = new ClassPathResource("templates/").getURL().toExternalForm();
+
+            ByteArrayOutputStream generatedPdfByteArrayOutputStream = new ByteArrayOutputStream();
+
+            PdfRendererBuilder openHtmlToPdfRendererBuilder = new PdfRendererBuilder();
+            openHtmlToPdfRendererBuilder.useFastMode();
+            openHtmlToPdfRendererBuilder.useSVGDrawer(new BatikSVGDrawer());
+            openHtmlToPdfRendererBuilder.withHtmlContent(renderedInvoiceHtml, classpathBaseUrlForHtmlResources);
+            openHtmlToPdfRendererBuilder.toStream(generatedPdfByteArrayOutputStream);
+            openHtmlToPdfRendererBuilder.run();
+
+            return generatedPdfByteArrayOutputStream.toByteArray();
+        } catch (Exception pdfGenerationException) {
+            throw new IllegalStateException("PDF invoice generation failed", pdfGenerationException);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/OrderService.java

@@ -0,0 +1,300 @@
+package com.printcalculator.service;
+
+import com.printcalculator.dto.AddressDto;
+import com.printcalculator.dto.CreateOrderRequest;
+import com.printcalculator.entity.*;
+import com.printcalculator.repository.CustomerRepository;
+import com.printcalculator.repository.OrderItemRepository;
+import com.printcalculator.repository.OrderRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
+import com.printcalculator.repository.QuoteSessionRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+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.time.format.DateTimeFormatter;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@Service
+public class 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;
+
+    public OrderService(OrderRepository orderRepo,
+                        OrderItemRepository orderItemRepo,
+                        QuoteSessionRepository quoteSessionRepo,
+                        QuoteLineItemRepository quoteLineItemRepo,
+                        CustomerRepository customerRepo,
+                        StorageService storageService,
+                        InvoicePdfRenderingService invoiceService,
+                        QrBillService qrBillService) {
+        this.orderRepo = orderRepo;
+        this.orderItemRepo = orderItemRepo;
+        this.quoteSessionRepo = quoteSessionRepo;
+        this.quoteLineItemRepo = quoteLineItemRepo;
+        this.customerRepo = customerRepo;
+        this.storageService = storageService;
+        this.invoiceService = invoiceService;
+        this.qrBillService = qrBillService;
+    }
+
+    @Transactional
+    public Order createOrderFromQuote(UUID quoteSessionId, CreateOrderRequest request) {
+        QuoteSession session = quoteSessionRepo.findById(quoteSessionId)
+                .orElseThrow(() -> new RuntimeException("Quote Session not found"));
+
+        if (session.getConvertedOrderId() != null) {
+            throw new IllegalStateException("Quote session already converted to order");
+        }
+
+        Customer customer = customerRepo.findByEmail(request.getCustomer().getEmail())
+                .orElseGet(() -> {
+                    Customer newC = new Customer();
+                    newC.setEmail(request.getCustomer().getEmail());
+                    newC.setCustomerType(request.getCustomer().getCustomerType());
+                    newC.setCreatedAt(OffsetDateTime.now());
+                    newC.setUpdatedAt(OffsetDateTime.now());
+                    return customerRepo.save(newC);
+                });
+
+        customer.setPhone(request.getCustomer().getPhone());
+        customer.setCustomerType(request.getCustomer().getCustomerType());
+        customer.setUpdatedAt(OffsetDateTime.now());
+        customerRepo.save(customer);
+
+        Order order = new Order();
+        order.setSourceQuoteSession(session);
+        order.setCustomer(customer);
+        order.setCustomerEmail(request.getCustomer().getEmail());
+        order.setCustomerPhone(request.getCustomer().getPhone());
+        order.setStatus("PENDING_PAYMENT");
+        order.setCreatedAt(OffsetDateTime.now());
+        order.setUpdatedAt(OffsetDateTime.now());
+        order.setCurrency("CHF");
+
+        order.setBillingCustomerType(request.getCustomer().getCustomerType());
+        if (request.getBillingAddress() != null) {
+            order.setBillingFirstName(request.getBillingAddress().getFirstName());
+            order.setBillingLastName(request.getBillingAddress().getLastName());
+            order.setBillingCompanyName(request.getBillingAddress().getCompanyName());
+            order.setBillingContactPerson(request.getBillingAddress().getContactPerson());
+            order.setBillingAddressLine1(request.getBillingAddress().getAddressLine1());
+            order.setBillingAddressLine2(request.getBillingAddress().getAddressLine2());
+            order.setBillingZip(request.getBillingAddress().getZip());
+            order.setBillingCity(request.getBillingAddress().getCity());
+            order.setBillingCountryCode(request.getBillingAddress().getCountryCode() != null ? request.getBillingAddress().getCountryCode() : "CH");
+        }
+
+        order.setShippingSameAsBilling(request.isShippingSameAsBilling());
+        if (!request.isShippingSameAsBilling() && request.getShippingAddress() != null) {
+            order.setShippingFirstName(request.getShippingAddress().getFirstName());
+            order.setShippingLastName(request.getShippingAddress().getLastName());
+            order.setShippingCompanyName(request.getShippingAddress().getCompanyName());
+            order.setShippingContactPerson(request.getShippingAddress().getContactPerson());
+            order.setShippingAddressLine1(request.getShippingAddress().getAddressLine1());
+            order.setShippingAddressLine2(request.getShippingAddress().getAddressLine2());
+            order.setShippingZip(request.getShippingAddress().getZip());
+            order.setShippingCity(request.getShippingAddress().getCity());
+            order.setShippingCountryCode(request.getShippingAddress().getCountryCode() != null ? request.getShippingAddress().getCountryCode() : "CH");
+        } else {
+            order.setShippingFirstName(order.getBillingFirstName());
+            order.setShippingLastName(order.getBillingLastName());
+            order.setShippingCompanyName(order.getBillingCompanyName());
+            order.setShippingContactPerson(order.getBillingContactPerson());
+            order.setShippingAddressLine1(order.getBillingAddressLine1());
+            order.setShippingAddressLine2(order.getBillingAddressLine2());
+            order.setShippingZip(order.getBillingZip());
+            order.setShippingCity(order.getBillingCity());
+            order.setShippingCountryCode(order.getBillingCountryCode());
+        }
+
+        List<QuoteLineItem> quoteItems = quoteLineItemRepo.findByQuoteSessionId(quoteSessionId);
+
+        BigDecimal subtotal = BigDecimal.ZERO;
+        order.setSubtotalChf(BigDecimal.ZERO);
+        order.setTotalChf(BigDecimal.ZERO);
+        order.setDiscountChf(BigDecimal.ZERO);
+        order.setSetupCostChf(session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO);
+        order.setShippingCostChf(BigDecimal.valueOf(9.00));
+
+        order = orderRepo.save(order);
+
+        List<OrderItem> savedItems = new ArrayList<>();
+
+        for (QuoteLineItem qItem : quoteItems) {
+            OrderItem oItem = new OrderItem();
+            oItem.setOrder(order);
+            oItem.setOriginalFilename(qItem.getOriginalFilename());
+            oItem.setQuantity(qItem.getQuantity());
+            oItem.setColorCode(qItem.getColorCode());
+            oItem.setMaterialCode(session.getMaterialCode());
+
+            oItem.setUnitPriceChf(qItem.getUnitPriceChf());
+            oItem.setLineTotalChf(qItem.getUnitPriceChf().multiply(BigDecimal.valueOf(qItem.getQuantity())));
+            oItem.setPrintTimeSeconds(qItem.getPrintTimeSeconds());
+            oItem.setMaterialGrams(qItem.getMaterialGrams());
+
+            UUID fileUuid = UUID.randomUUID();
+            String ext = getExtension(qItem.getOriginalFilename());
+            String storedFilename = fileUuid.toString() + "." + ext;
+
+            oItem.setStoredFilename(storedFilename);
+            oItem.setStoredRelativePath("PENDING");
+            oItem.setMimeType("application/octet-stream");
+            oItem.setCreatedAt(OffsetDateTime.now());
+
+            oItem = orderItemRepo.save(oItem);
+
+            String relativePath = "orders/" + order.getId() + "/3d-files/" + oItem.getId() + "/" + storedFilename;
+            oItem.setStoredRelativePath(relativePath);
+
+            if (qItem.getStoredPath() != null) {
+                try {
+                    Path sourcePath = Paths.get(qItem.getStoredPath());
+                    if (Files.exists(sourcePath)) {
+                        storageService.store(sourcePath, Paths.get(relativePath));
+                        oItem.setFileSizeBytes(Files.size(sourcePath));
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+
+            oItem = orderItemRepo.save(oItem);
+            savedItems.add(oItem);
+            subtotal = subtotal.add(oItem.getLineTotalChf());
+        }
+
+        order.setSubtotalChf(subtotal);
+        if (order.getShippingCostChf() == null) {
+            order.setShippingCostChf(BigDecimal.valueOf(9.00));
+        }
+
+        BigDecimal total = subtotal.add(order.getSetupCostChf()).add(order.getShippingCostChf()).subtract(order.getDiscountChf() != null ? order.getDiscountChf() : BigDecimal.ZERO);
+        order.setTotalChf(total);
+
+        session.setConvertedOrderId(order.getId());
+        session.setStatus("CONVERTED");
+        quoteSessionRepo.save(session);
+
+        // Generate Invoice and QR Bill
+        generateAndSaveDocuments(order, savedItems);
+
+        return orderRepo.save(order);
+    }
+    
+    private void generateAndSaveDocuments(Order order, List<OrderItem> items) {
+        try {
+            // 1. Generate QR Bill
+            byte[] qrBillSvgBytes = qrBillService.generateQrBillSvg(order);
+            String qrBillSvg = new String(qrBillSvgBytes, StandardCharsets.UTF_8);
+
+            // Strip XML declaration and DOCTYPE if present, as they validity break the embedding HTML page
+            if (qrBillSvg.contains("<?xml")) {
+                int svgStartIndex = qrBillSvg.indexOf("<svg");
+                if (svgStartIndex != -1) {
+                    qrBillSvg = qrBillSvg.substring(svgStartIndex);
+                }
+            }
+            
+            // Save QR Bill SVG
+            String qrRelativePath = "orders/" + order.getId() + "/documents/qr-bill.svg";
+            saveFileBytes(qrBillSvgBytes, qrRelativePath);
+
+            // 2. Prepare Invoice Variables
+            Map<String, Object> vars = new HashMap<>();
+            vars.put("sellerDisplayName", "3D Fab Switzerland");
+            vars.put("sellerAddressLine1", "Sede Ticino, Svizzera");
+            vars.put("sellerAddressLine2", "Sede Bienne, Svizzera");
+            vars.put("sellerEmail", "info@3dfab.ch");
+
+            vars.put("invoiceNumber", "INV-" + order.getId().toString().substring(0, 8).toUpperCase());
+            vars.put("invoiceDate", order.getCreatedAt().format(DateTimeFormatter.ISO_LOCAL_DATE));
+            vars.put("dueDate", order.getCreatedAt().plusDays(7).format(DateTimeFormatter.ISO_LOCAL_DATE));
+
+            String buyerName = "BUSINESS".equals(order.getBillingCustomerType())
+                    ? order.getBillingCompanyName()
+                    : order.getBillingFirstName() + " " + order.getBillingLastName();
+            vars.put("buyerDisplayName", buyerName);
+            vars.put("buyerAddressLine1", order.getBillingAddressLine1());
+            vars.put("buyerAddressLine2", order.getBillingZip() + " " + order.getBillingCity() + ", " + order.getBillingCountryCode());
+
+            List<Map<String, Object>> invoiceLineItems = items.stream().map(i -> {
+                Map<String, Object> line = new HashMap<>();
+                line.put("description", "Stampa 3D: " + i.getOriginalFilename());
+                line.put("quantity", i.getQuantity());
+                line.put("unitPriceFormatted", String.format("CHF %.2f", i.getUnitPriceChf()));
+                line.put("lineTotalFormatted", String.format("CHF %.2f", i.getLineTotalChf()));
+                return line;
+            }).collect(Collectors.toList());
+
+            Map<String, Object> setupLine = new HashMap<>();
+            setupLine.put("description", "Costo Setup");
+            setupLine.put("quantity", 1);
+            setupLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+            setupLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getSetupCostChf()));
+            invoiceLineItems.add(setupLine);
+
+            Map<String, Object> shippingLine = new HashMap<>();
+            shippingLine.put("description", "Spedizione");
+            shippingLine.put("quantity", 1);
+            shippingLine.put("unitPriceFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+            shippingLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getShippingCostChf()));
+            invoiceLineItems.add(shippingLine);
+
+            vars.put("invoiceLineItems", invoiceLineItems);
+            vars.put("subtotalFormatted", String.format("CHF %.2f", order.getSubtotalChf()));
+            vars.put("grandTotalFormatted", String.format("CHF %.2f", order.getTotalChf()));
+            vars.put("paymentTermsText", "Appena riceviamo il pagamento l'ordine entrerà nella coda di stampa. Grazie per la fiducia");
+
+            // 3. Generate PDF
+            byte[] pdfBytes = invoiceService.generateInvoicePdfBytesFromTemplate(vars, qrBillSvg);
+            
+            // Save PDF
+            String pdfRelativePath = "orders/" + order.getId() + "/documents/invoice-" + order.getId() + ".pdf";
+            saveFileBytes(pdfBytes, pdfRelativePath);
+
+        } catch (Exception e) {
+            e.printStackTrace(); 
+            // Don't fail the order if document generation fails, but log it
+            // TODO: Better error handling
+        }
+    }
+
+    private void saveFileBytes(byte[] content, String relativePath) {
+        // Since StorageService takes paths, we might need to write to temp first or check if it supports bytes/streams
+        // Simulating via temp file for now as StorageService.store takes a Path
+        try {
+            Path tempFile = Files.createTempFile("print-calc-upload", ".tmp");
+            Files.write(tempFile, content);
+            storageService.store(tempFile, Paths.get(relativePath));
+            Files.delete(tempFile);
+        } catch (IOException e) {
+             throw new RuntimeException("Failed to save file " + relativePath, e);
+        }
+    }
+
+    private String getExtension(String filename) {
+        if (filename == null) return "stl";
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            return filename.substring(i + 1);
+        }
+        return "stl";
+    }
+}

backend/src/main/java/com/printcalculator/service/ProfileManager.java

@@ -0,0 +1,139 @@
+package com.printcalculator.service;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Iterator;
+import java.util.Optional;
+import java.util.logging.Logger;
+import java.util.stream.Stream;
+import java.util.Map;
+import java.util.HashMap;
+import java.math.BigDecimal;
+
+@Service
+public class ProfileManager {
+
+    private static final Logger logger = Logger.getLogger(ProfileManager.class.getName());
+    private final String profilesRoot;
+    private final ObjectMapper mapper;
+
+    private final Map<String, String> profileAliases;
+
+    public ProfileManager(@Value("${profiles.root:profiles}") String profilesRoot, ObjectMapper mapper) {
+        this.profilesRoot = profilesRoot;
+        this.mapper = mapper;
+        this.profileAliases = new HashMap<>();
+        initializeAliases();
+    }
+
+    private void initializeAliases() {
+        // Machine Aliases
+        profileAliases.put("bambu_a1", "Bambu Lab A1 0.4 nozzle");
+        
+        // Material Aliases
+        profileAliases.put("pla_basic", "Bambu PLA Basic @BBL A1");
+        profileAliases.put("petg_basic", "Bambu PETG Basic @BBL A1");
+        profileAliases.put("tpu_95a", "Bambu TPU 95A @BBL A1");
+        
+        // Quality/Process Aliases
+        profileAliases.put("draft", "0.24mm Draft @BBL A1");
+        profileAliases.put("standard", "0.20mm Standard @BBL A1"); // or 0.20mm Standard @BBL A1
+        profileAliases.put("extra_fine", "0.08mm High Quality @BBL A1");
+        
+        // Additional aliases from error logs
+        profileAliases.put("Bambu_Process_0.20_Standard", "0.20mm Standard @BBL A1");
+    }
+
+    public ObjectNode getMergedProfile(String profileName, String type) throws IOException {
+        Path profilePath = findProfileFile(profileName, type);
+        if (profilePath == null) {
+            throw new IOException("Profile not found: " + profileName);
+        }
+        return resolveInheritance(profilePath);
+    }
+
+    public String resolveMachineProfileName(String machineName, Double nozzleDiameter) {
+        String resolvedName = profileAliases.getOrDefault(machineName, machineName);
+        if (nozzleDiameter == null) return resolvedName;
+
+        String base = resolvedName.replaceAll("\\s*\\d+(?:\\.\\d+)?\\s*nozzle$", "").trim();
+        String formatted = BigDecimal.valueOf(nozzleDiameter).stripTrailingZeros().toPlainString();
+        String candidate = base + " " + formatted + " nozzle";
+
+        Path exists = findProfileFile(candidate, "machine");
+        return exists != null ? candidate : resolvedName;
+    }
+
+    private Path findProfileFile(String name, String type) {
+        // Check aliases first
+        String resolvedName = profileAliases.getOrDefault(name, name);
+        
+        // Simple search: look for name.json in the profiles_root recursively
+        // Type could be "machine", "process", "filament" to narrow down, but for now global search
+        String filename = resolvedName.endsWith(".json") ? resolvedName : resolvedName + ".json";
+        
+        try (Stream<Path> stream = Files.walk(Paths.get(profilesRoot))) {
+            Optional<Path> found = stream
+                    .filter(p -> p.getFileName().toString().equals(filename))
+                    .findFirst();
+            return found.orElse(null);
+        } catch (IOException e) {
+            logger.severe("Error searching for profile: " + e.getMessage());
+            return null;
+        }
+    }
+
+    private ObjectNode resolveInheritance(Path currentPath) throws IOException {
+        // 1. Load current
+        JsonNode currentNode = mapper.readTree(currentPath.toFile());
+        
+        // 2. Check inherits
+        if (currentNode.has("inherits")) {
+            String parentName = currentNode.get("inherits").asText();
+            // Try to find parent in same directory or standard search
+            Path parentPath = currentPath.getParent().resolve(parentName);
+            if (!Files.exists(parentPath)) {
+                // If not in same dir, search globally
+                parentPath = findProfileFile(parentName, "any");
+            }
+
+            if (parentPath != null && Files.exists(parentPath)) {
+                // Recursive call
+                ObjectNode parentNode = resolveInheritance(parentPath);
+                // Merge current into parent (child overrides parent)
+                merge(parentNode, (ObjectNode) currentNode);
+                // Remove "inherits" field
+                parentNode.remove("inherits");
+                return parentNode;
+            } else {
+                 logger.warning("Inherited profile not found: " + parentName + " for " + currentPath);
+            }
+        }
+
+        if (currentNode instanceof ObjectNode) {
+            return (ObjectNode) currentNode;
+        } else {
+             // Should verify it is an object
+             return (ObjectNode) currentNode;
+        }
+    }
+
+    // Shallow merge suitable for OrcaSlicer profiles
+    private void merge(ObjectNode mainNode, ObjectNode updateNode) {
+        Iterator<String> fieldNames = updateNode.fieldNames();
+        while (fieldNames.hasNext()) {
+            String fieldName = fieldNames.next();
+            JsonNode jsonNode = updateNode.get(fieldName);
+            // Replace standard fields
+            mainNode.set(fieldName, jsonNode);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/QrBillService.java

@@ -0,0 +1,68 @@
+package com.printcalculator.service;
+
+import com.printcalculator.entity.Order;
+import net.codecrete.qrbill.generator.Bill;
+import net.codecrete.qrbill.generator.GraphicsFormat;
+import net.codecrete.qrbill.generator.QRBill;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+
+@Service
+public class QrBillService {
+
+    public byte[] generateQrBillSvg(Order order) {
+        Bill bill = createBillFromOrder(order);
+        return QRBill.generate(bill);
+    }
+    
+    public Bill createBillFromOrder(Order order) {
+        Bill bill = new Bill();
+
+        // Creditor (Merchant)
+        bill.setAccount("CH7409000000154821581"); // TODO: Configurable IBAN
+        bill.setCreditor(createAddress(
+                "Küng, Joe",
+                "Via G. Pioda 29a",
+                "6710",
+                "Biasca",
+                "CH"
+        ));
+
+        // Debtor (Customer)
+        String debtorName;
+        if ("BUSINESS".equals(order.getBillingCustomerType())) {
+            debtorName = order.getBillingCompanyName();
+        } else {
+            debtorName = order.getBillingFirstName() + " " + order.getBillingLastName();
+        }
+        
+        bill.setDebtor(createAddress(
+                debtorName,
+                order.getBillingAddressLine1(), // Assuming simple address for now. Splitting might be needed if street/house number are separate
+                order.getBillingZip(),
+                order.getBillingCity(),
+                order.getBillingCountryCode()
+        ));
+
+        // Amount
+        bill.setAmount(order.getTotalChf());
+        bill.setCurrency("CHF");
+
+        // Reference
+        // bill.setReference(QRBill.createCreditorReference("...")); // If using QRR
+        bill.setUnstructuredMessage("Order " + order.getId());
+
+        return bill;
+    }
+
+    private net.codecrete.qrbill.generator.Address createAddress(String name, String street, String zip, String city, String country) {
+        net.codecrete.qrbill.generator.Address address = new net.codecrete.qrbill.generator.Address();
+        address.setName(name);
+        address.setStreet(street);
+        address.setPostalCode(zip);
+        address.setTown(city);
+        address.setCountryCode(country);
+        return address;
+    }
+}

backend/src/main/java/com/printcalculator/service/QuoteCalculator.java

@@ -0,0 +1,168 @@
+package com.printcalculator.service;
+
+
+import com.printcalculator.entity.FilamentMaterialType;
+import com.printcalculator.entity.FilamentVariant;
+import com.printcalculator.entity.PricingPolicy;
+import com.printcalculator.entity.PricingPolicyMachineHourTier;
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.model.PrintStats;
+import com.printcalculator.model.QuoteResult;
+import com.printcalculator.repository.FilamentMaterialTypeRepository;
+import com.printcalculator.repository.FilamentVariantRepository;
+import com.printcalculator.repository.PricingPolicyMachineHourTierRepository;
+import com.printcalculator.repository.PricingPolicyRepository;
+import com.printcalculator.repository.PrinterMachineRepository;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.List;
+
+@Service
+public class QuoteCalculator {
+
+    private final PricingPolicyRepository pricingRepo;
+    private final PricingPolicyMachineHourTierRepository tierRepo;
+    private final PrinterMachineRepository machineRepo;
+    private final FilamentMaterialTypeRepository materialRepo;
+    private final FilamentVariantRepository variantRepo;
+
+    public QuoteCalculator(PricingPolicyRepository pricingRepo,
+                           PricingPolicyMachineHourTierRepository tierRepo,
+                           PrinterMachineRepository machineRepo,
+                           FilamentMaterialTypeRepository materialRepo,
+                           FilamentVariantRepository variantRepo) {
+        this.pricingRepo = pricingRepo;
+        this.tierRepo = tierRepo;
+        this.machineRepo = machineRepo;
+        this.materialRepo = materialRepo;
+        this.variantRepo = variantRepo;
+    }
+
+    public QuoteResult calculate(PrintStats stats, String machineName, String filamentProfileName) {
+        // 1. Fetch Active Policy
+        PricingPolicy policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
+        if (policy == null) {
+            throw new RuntimeException("No active pricing policy found");
+        }
+
+        // 2. Fetch Machine Info
+        // Map "bambu_a1" -> "BambuLab A1" or similar?
+        // Ideally we should use the display name from DB.
+        // For now, if machineName is a code, we might need a mapping or just fuzzy search.
+        // Let's assume machineName is mapped or we search by display name.
+        // If not found, fallback to first active.
+        PrinterMachine machine = machineRepo.findByPrinterDisplayName(machineName).orElse(null);
+        if (machine == null) {
+             // Try "BambuLab A1" if code was "bambu_a1" logic or just get first active
+             machine = machineRepo.findFirstByIsActiveTrue()
+                 .orElseThrow(() -> new RuntimeException("No active printer found"));
+        }
+
+        // 3. Fetch Filament Info
+        // filamentProfileName might be "bambu_pla_basic_black" or "Generic PLA"
+        // We try to extract material code (PLA, PETG)
+        String materialCode = detectMaterialCode(filamentProfileName);
+        FilamentMaterialType materialType = materialRepo.findByMaterialCode(materialCode)
+                .orElseThrow(() -> new RuntimeException("Unknown material type: " + materialCode));
+
+        // Try to find specific variant (e.g. by color if we could parse it)
+        // For now, get default/first active variant for this material
+        FilamentVariant variant = variantRepo.findFirstByFilamentMaterialTypeAndIsActiveTrue(materialType)
+                .orElseThrow(() -> new RuntimeException("No active variant for material: " + materialCode));
+
+
+        // --- CALCULATIONS ---
+
+        // Material Cost: (weight / 1000) * costPerKg
+        // DISCOUNTED Support material to avoid penalizing users for default supports
+        BigDecimal weightToCharge;
+        if (stats.getModelWeightGrams() != null && stats.getSupportWeightGrams() != null) {
+            // Charge 100% for model + 20% for support
+            weightToCharge = BigDecimal.valueOf(stats.getModelWeightGrams())
+                    .add(BigDecimal.valueOf(stats.getSupportWeightGrams()).multiply(BigDecimal.valueOf(0.2)));
+        } else {
+            weightToCharge = BigDecimal.valueOf(stats.getFilamentWeightGrams());
+        }
+
+        BigDecimal weightKg = weightToCharge.divide(BigDecimal.valueOf(1000), 4, RoundingMode.HALF_UP);
+        BigDecimal materialCost = weightKg.multiply(variant.getCostChfPerKg());
+
+        // Machine Cost: Tiered
+        BigDecimal totalHours = BigDecimal.valueOf(stats.getPrintTimeSeconds()).divide(BigDecimal.valueOf(3600), 4, RoundingMode.HALF_UP);
+        BigDecimal machineCost = calculateMachineCost(policy, totalHours);
+
+        // Energy Cost: (watts / 1000) * hours * costPerKwh
+        BigDecimal kw = BigDecimal.valueOf(machine.getPowerWatts()).divide(BigDecimal.valueOf(1000), 4, RoundingMode.HALF_UP);
+        BigDecimal kwh = kw.multiply(totalHours);
+        BigDecimal energyCost = kwh.multiply(policy.getElectricityCostChfPerKwh());
+
+        // Subtotal (Costs + Fixed Fees)
+        BigDecimal fixedFee = policy.getFixedJobFeeChf();
+        BigDecimal subtotal = materialCost.add(machineCost).add(energyCost).add(fixedFee);
+
+        // Markup
+        // Markup is percentage (e.g. 20.0)
+        BigDecimal markupFactor = BigDecimal.ONE.add(policy.getMarkupPercent().divide(BigDecimal.valueOf(100), 4, RoundingMode.HALF_UP));
+        BigDecimal totalPrice = subtotal.multiply(markupFactor).setScale(2, RoundingMode.HALF_UP);
+
+        return new QuoteResult(totalPrice.doubleValue(), "CHF", stats, fixedFee.doubleValue());
+    }
+
+    private BigDecimal calculateMachineCost(PricingPolicy policy, BigDecimal hours) {
+        List<PricingPolicyMachineHourTier> tiers = tierRepo.findAllByPricingPolicyOrderByTierStartHoursAsc(policy);
+        if (tiers.isEmpty()) {
+            return BigDecimal.ZERO; // Should not happen if DB is correct
+        }
+
+        BigDecimal remainingHours = hours;
+        BigDecimal totalCost = BigDecimal.ZERO;
+        BigDecimal processedHours = BigDecimal.ZERO;
+
+        for (PricingPolicyMachineHourTier tier : tiers) {
+            if (remainingHours.compareTo(BigDecimal.ZERO) <= 0) break;
+
+            BigDecimal tierStart = tier.getTierStartHours();
+            BigDecimal tierEnd = tier.getTierEndHours(); // can be null for infinity
+            
+            // Determine duration in this tier
+            // Valid duration in this tier = (min(tierEnd, totalHours) - tierStart)
+            // But logic is simpler: we consume hours sequentially?
+            // "0-10h @ 2CHF, 10-20h @ 1.5CHF" implies:
+            // 5h job -> 5 * 2
+            // 15h job -> 10 * 2 + 5 * 1.5
+            
+            BigDecimal tierDuration;
+            
+            // Max hours applicable in this tier relative to 0
+            BigDecimal tierLimit = (tierEnd != null) ? tierEnd : BigDecimal.valueOf(Long.MAX_VALUE);
+            
+            // The amount of hours falling into this bucket
+            // Upper bound for this calculation is min(totalHours, tierLimit)
+            // Lower bound is tierStart
+            // So hours in this bucket = max(0, min(totalHours, tierLimit) - tierStart)
+            
+            BigDecimal upper = hours.min(tierLimit);
+            BigDecimal lower = tierStart;
+            
+            if (upper.compareTo(lower) > 0) {
+                 BigDecimal hoursInTier = upper.subtract(lower);
+                 totalCost = totalCost.add(hoursInTier.multiply(tier.getMachineCostChfPerHour()));
+            }
+        }
+        
+        return totalCost;
+    }
+
+    private String detectMaterialCode(String profileName) {
+        String lower = profileName.toLowerCase();
+        if (lower.contains("petg")) return "PETG";
+        if (lower.contains("tpu")) return "TPU";
+        if (lower.contains("abs")) return "ABS";
+        if (lower.contains("nylon")) return "Nylon";
+        if (lower.contains("asa")) return "ASA";
+        // Default to PLA
+        return "PLA";
+    }
+}

backend/src/main/java/com/printcalculator/service/SessionCleanupService.java

@@ -0,0 +1,79 @@
+package com.printcalculator.service;
+
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.repository.QuoteSessionRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.stream.Stream;
+
+@Service
+public class SessionCleanupService {
+
+    private static final Logger logger = LoggerFactory.getLogger(SessionCleanupService.class);
+    private final QuoteSessionRepository sessionRepository;
+
+    public SessionCleanupService(QuoteSessionRepository sessionRepository) {
+        this.sessionRepository = sessionRepository;
+    }
+
+    // Run every day at 3 AM
+    @Scheduled(cron = "0 0 3 * * ?")
+    @Transactional
+    public void cleanupOldSessions() {
+        logger.info("Starting session cleanup job...");
+
+        OffsetDateTime cutoff = OffsetDateTime.now().minusDays(15);
+        List<QuoteSession> oldSessions = sessionRepository.findByCreatedAtBefore(cutoff);
+
+        int deletedCount = 0;
+        for (QuoteSession session : oldSessions) {
+            // We only delete sessions that are NOT ordered? 
+            // The user request was "delete old ones". 
+            // Safest is to check status if we had one. 
+            // QuoteSession entity has 'status' field.
+            // Let's assume we delete 'PENDING' or similar, but maybe we just delete all old inputs?
+            // "rimangono in memoria... cancella quelle vecchie di 7 giorni".
+            // Implementation plan said: status != 'ORDERED'.
+            
+            // User specified statuses: ACTIVE, EXPIRED, CONVERTED.
+            // We should NOT delete sessions that have been converted to an order.
+            if ("CONVERTED".equals(session.getStatus())) {
+                continue;
+            }
+
+            try {
+                // Delete ACTIVE or EXPIRED sessions older than 7 days
+                deleteSessionFiles(session.getId().toString());
+                sessionRepository.delete(session);
+                deletedCount++;
+            } catch (Exception e) {
+                logger.error("Failed to cleanup session {}", session.getId(), e);
+            }
+        }
+
+        logger.info("Session cleanup job finished. Deleted {} sessions.", deletedCount);
+    }
+
+    private void deleteSessionFiles(String sessionId) {
+        Path sessionDir = Paths.get("storage_quotes", sessionId);
+        if (Files.exists(sessionDir)) {
+            try (Stream<Path> walk = Files.walk(sessionDir)) {
+                walk.sorted(java.util.Comparator.reverseOrder())
+                    .map(Path::toFile)
+                    .forEach(java.io.File::delete);
+            } catch (IOException e) {
+                logger.error("Failed to delete directory: {}", sessionDir, e);
+            }
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/SlicerService.java

@@ -0,0 +1,119 @@
+package com.printcalculator.service;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.printcalculator.model.PrintStats;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Logger;
+import java.util.stream.Stream;
+
+@Service
+public class SlicerService {
+
+    private static final Logger logger = Logger.getLogger(SlicerService.class.getName());
+
+    private final String slicerPath;
+    private final ProfileManager profileManager;
+    private final GCodeParser gCodeParser;
+    private final ObjectMapper mapper;
+
+    public SlicerService(
+            @Value("${slicer.path}") String slicerPath,
+            ProfileManager profileManager,
+            GCodeParser gCodeParser,
+            ObjectMapper mapper) {
+        this.slicerPath = slicerPath;
+        this.profileManager = profileManager;
+        this.gCodeParser = gCodeParser;
+        this.mapper = mapper;
+    }
+
+    public PrintStats slice(File inputStl, String machineName, String filamentName, String processName,
+                            Map<String, String> machineOverrides, Map<String, String> processOverrides) throws IOException {
+        ObjectNode machineProfile = profileManager.getMergedProfile(machineName, "machine");
+        ObjectNode filamentProfile = profileManager.getMergedProfile(filamentName, "filament");
+        ObjectNode processProfile = profileManager.getMergedProfile(processName, "process");
+
+        if (machineOverrides != null) machineOverrides.forEach(machineProfile::put);
+        if (processOverrides != null) processOverrides.forEach(processProfile::put);
+
+        Path tempDir = Files.createTempDirectory("slicer_job_");
+        
+        try {
+            File mFile = tempDir.resolve("machine.json").toFile();
+            File fFile = tempDir.resolve("filament.json").toFile();
+            File pFile = tempDir.resolve("process.json").toFile();
+
+            mapper.writeValue(mFile, machineProfile);
+            mapper.writeValue(fFile, filamentProfile);
+            mapper.writeValue(pFile, processProfile);
+
+            List<String> command = new ArrayList<>();
+            command.add(slicerPath); 
+            
+            command.add("--load-settings");
+            command.add(mFile.getAbsolutePath());
+            command.add("--load-settings");
+            command.add(pFile.getAbsolutePath());
+            command.add("--load-filaments");
+            command.add(fFile.getAbsolutePath());
+            
+            command.add("--ensure-on-bed");
+            command.add("--arrange");
+            command.add("1");
+            command.add("--outputdir");
+            command.add(tempDir.toAbsolutePath().toString());
+            
+            command.add("--slice");
+            command.add("0");
+
+            command.add(inputStl.getAbsolutePath());
+
+            logger.info("Executing Slicer: " + String.join(" ", command));
+
+            runSlicerCommand(command, tempDir);
+
+            try (Stream<Path> s = Files.list(tempDir)) {
+                Optional<Path> found = s.filter(p -> p.toString().endsWith(".gcode")).findFirst();
+                if (found.isPresent()) return gCodeParser.parse(found.get().toFile());
+                else throw new IOException("No GCode found in " + tempDir);
+            }
+
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IOException(e);
+        }
+    }
+
+    protected void runSlicerCommand(List<String> command, Path tempDir) throws IOException, InterruptedException {
+        ProcessBuilder pb = new ProcessBuilder(command);
+        pb.directory(tempDir.toFile());
+        
+        Map<String, String> env = pb.environment();
+        env.put("HOME", "/tmp");
+        env.put("QT_QPA_PLATFORM", "offscreen");
+        
+        Process process = pb.start();
+        if (!process.waitFor(5, TimeUnit.MINUTES)) {
+            process.destroy();
+            throw new IOException("Slicer timeout");
+        }
+
+        if (process.exitValue() != 0) {
+            String out = new String(process.getInputStream().readAllBytes());
+            String err = new String(process.getErrorStream().readAllBytes());
+            throw new IOException("Slicer failed with exit code " + process.exitValue() + "\nERR: " + err + "\nOUT: " + out);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/StlService.java

@@ -0,0 +1,255 @@
+package com.printcalculator.service;
+
+import com.printcalculator.model.StlBounds;
+import com.printcalculator.model.StlShiftResult;
+import org.springframework.stereotype.Service;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Locale;
+
+@Service
+public class StlService {
+
+    public StlBounds readBounds(File stlFile) throws IOException {
+        long size = stlFile.length();
+        if (size >= 84 && isBinaryStl(stlFile, size)) {
+            return readBinaryBounds(stlFile);
+        }
+        return readAsciiBounds(stlFile);
+    }
+
+    public StlShiftResult shiftToFitIfNeeded(File stlFile, StlBounds bounds,
+                                             int bedX, int bedY, int bedZ) throws IOException {
+        double sizeX = bounds.sizeX();
+        double sizeY = bounds.sizeY();
+        double sizeZ = bounds.sizeZ();
+
+        double targetMinX = (bedX - sizeX) / 2.0;
+        double targetMinY = (bedY - sizeY) / 2.0;
+        double targetMinZ = 0.0;
+
+        double offsetX = targetMinX - bounds.minX();
+        double offsetY = targetMinY - bounds.minY();
+        double offsetZ = targetMinZ - bounds.minZ();
+
+        boolean needsShift = Math.abs(offsetX) > 1e-6 || Math.abs(offsetY) > 1e-6 || Math.abs(offsetZ) > 1e-6;
+        if (!needsShift) {
+            return new StlShiftResult(null, offsetX, offsetY, offsetZ, false);
+        }
+
+        Path shiftedPath = Files.createTempFile("stl_shifted_", ".stl");
+        writeShifted(stlFile, shiftedPath.toFile(), offsetX, offsetY, offsetZ);
+        return new StlShiftResult(shiftedPath, offsetX, offsetY, offsetZ, true);
+    }
+
+    private boolean isBinaryStl(File stlFile, long size) throws IOException {
+        try (RandomAccessFile raf = new RandomAccessFile(stlFile, "r")) {
+            raf.seek(80);
+            long triangleCount = readLEUInt32(raf);
+            long expected = 84L + triangleCount * 50L;
+            return expected == size;
+        }
+    }
+
+    private StlBounds readBinaryBounds(File stlFile) throws IOException {
+        try (RandomAccessFile raf = new RandomAccessFile(stlFile, "r")) {
+            raf.seek(80);
+            long triangleCount = readLEUInt32(raf);
+            raf.seek(84);
+
+            BoundsAccumulator acc = new BoundsAccumulator();
+            for (long i = 0; i < triangleCount; i++) {
+                // skip normal
+                readLEFloat(raf);
+                readLEFloat(raf);
+                readLEFloat(raf);
+                // 3 vertices
+                acc.accept(readLEFloat(raf), readLEFloat(raf), readLEFloat(raf));
+                acc.accept(readLEFloat(raf), readLEFloat(raf), readLEFloat(raf));
+                acc.accept(readLEFloat(raf), readLEFloat(raf), readLEFloat(raf));
+                // skip attribute byte count
+                raf.skipBytes(2);
+            }
+            return acc.toBounds();
+        }
+    }
+
+    private StlBounds readAsciiBounds(File stlFile) throws IOException {
+        BoundsAccumulator acc = new BoundsAccumulator();
+        try (BufferedReader reader = Files.newBufferedReader(stlFile.toPath(), StandardCharsets.US_ASCII)) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                line = line.trim();
+                if (!line.startsWith("vertex")) continue;
+                String[] parts = line.split("\\s+");
+                if (parts.length < 4) continue;
+                double x = Double.parseDouble(parts[1]);
+                double y = Double.parseDouble(parts[2]);
+                double z = Double.parseDouble(parts[3]);
+                acc.accept(x, y, z);
+            }
+        }
+        return acc.toBounds();
+    }
+
+    private void writeShifted(File input, File output, double offsetX, double offsetY, double offsetZ) throws IOException {
+        long size = input.length();
+        if (size >= 84 && isBinaryStl(input, size)) {
+            writeShiftedBinary(input, output, offsetX, offsetY, offsetZ);
+        } else {
+            writeShiftedAscii(input, output, offsetX, offsetY, offsetZ);
+        }
+    }
+
+    private void writeShiftedAscii(File input, File output, double offsetX, double offsetY, double offsetZ) throws IOException {
+        try (BufferedReader reader = Files.newBufferedReader(input.toPath(), StandardCharsets.US_ASCII);
+             BufferedWriter writer = Files.newBufferedWriter(output.toPath(), StandardCharsets.US_ASCII)) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                String trimmed = line.trim();
+                if (!trimmed.startsWith("vertex")) {
+                    writer.write(line);
+                    writer.newLine();
+                    continue;
+                }
+                String[] parts = trimmed.split("\\s+");
+                if (parts.length < 4) {
+                    writer.write(line);
+                    writer.newLine();
+                    continue;
+                }
+                double x = Double.parseDouble(parts[1]) + offsetX;
+                double y = Double.parseDouble(parts[2]) + offsetY;
+                double z = Double.parseDouble(parts[3]) + offsetZ;
+                int idx = line.indexOf("vertex");
+                String indent = idx > 0 ? line.substring(0, idx) : "";
+                writer.write(indent + String.format(Locale.US, "vertex %.6f %.6f %.6f", x, y, z));
+                writer.newLine();
+            }
+        }
+    }
+
+    private void writeShiftedBinary(File input, File output, double offsetX, double offsetY, double offsetZ) throws IOException {
+        try (RandomAccessFile raf = new RandomAccessFile(input, "r");
+             OutputStream out = new FileOutputStream(output)) {
+            byte[] header = new byte[80];
+            raf.readFully(header);
+            out.write(header);
+
+            long triangleCount = readLEUInt32(raf);
+            writeLEUInt32(out, triangleCount);
+
+            for (long i = 0; i < triangleCount; i++) {
+                // normal
+                writeLEFloat(out, readLEFloat(raf));
+                writeLEFloat(out, readLEFloat(raf));
+                writeLEFloat(out, readLEFloat(raf));
+
+                // vertices
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetX));
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetY));
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetZ));
+
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetX));
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetY));
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetZ));
+
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetX));
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetY));
+                writeLEFloat(out, (float) (readLEFloat(raf) + offsetZ));
+
+                // attribute byte count
+                int b1 = raf.read();
+                int b2 = raf.read();
+                if ((b1 | b2) < 0) throw new IOException("Unexpected EOF while reading STL");
+                out.write(b1);
+                out.write(b2);
+            }
+        }
+    }
+
+    private long readLEUInt32(RandomAccessFile raf) throws IOException {
+        int b1 = raf.read();
+        int b2 = raf.read();
+        int b3 = raf.read();
+        int b4 = raf.read();
+        if ((b1 | b2 | b3 | b4) < 0) throw new IOException("Unexpected EOF while reading STL");
+        return ((long) b1 & 0xFF)
+                | (((long) b2 & 0xFF) << 8)
+                | (((long) b3 & 0xFF) << 16)
+                | (((long) b4 & 0xFF) << 24);
+    }
+
+    private int readLEInt(RandomAccessFile raf) throws IOException {
+        int b1 = raf.read();
+        int b2 = raf.read();
+        int b3 = raf.read();
+        int b4 = raf.read();
+        if ((b1 | b2 | b3 | b4) < 0) throw new IOException("Unexpected EOF while reading STL");
+        return (b1 & 0xFF)
+                | ((b2 & 0xFF) << 8)
+                | ((b3 & 0xFF) << 16)
+                | ((b4 & 0xFF) << 24);
+    }
+
+    private float readLEFloat(RandomAccessFile raf) throws IOException {
+        return Float.intBitsToFloat(readLEInt(raf));
+    }
+
+    private void writeLEUInt32(OutputStream out, long value) throws IOException {
+        out.write((int) (value & 0xFF));
+        out.write((int) ((value >> 8) & 0xFF));
+        out.write((int) ((value >> 16) & 0xFF));
+        out.write((int) ((value >> 24) & 0xFF));
+    }
+
+    private void writeLEFloat(OutputStream out, float value) throws IOException {
+        int bits = Float.floatToIntBits(value);
+        out.write(bits & 0xFF);
+        out.write((bits >> 8) & 0xFF);
+        out.write((bits >> 16) & 0xFF);
+        out.write((bits >> 24) & 0xFF);
+    }
+
+    private static class BoundsAccumulator {
+        private boolean hasPoint = false;
+        private double minX;
+        private double minY;
+        private double minZ;
+        private double maxX;
+        private double maxY;
+        private double maxZ;
+
+        void accept(double x, double y, double z) {
+            if (!hasPoint) {
+                minX = maxX = x;
+                minY = maxY = y;
+                minZ = maxZ = z;
+                hasPoint = true;
+                return;
+            }
+            if (x < minX) minX = x;
+            if (y < minY) minY = y;
+            if (z < minZ) minZ = z;
+            if (x > maxX) maxX = x;
+            if (y > maxY) maxY = y;
+            if (z > maxZ) maxZ = z;
+        }
+
+        StlBounds toBounds() throws IOException {
+            if (!hasPoint) {
+                throw new IOException("STL appears to contain no vertices");
+            }
+            return new StlBounds(minX, minY, minZ, maxX, maxY, maxZ);
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/StorageService.java

@@ -0,0 +1,14 @@
+package com.printcalculator.service;
+
+import org.springframework.core.io.Resource;
+import org.springframework.web.multipart.MultipartFile;
+import java.nio.file.Path;
+import java.io.IOException;
+
+public interface StorageService {
+    void init();
+    void store(MultipartFile file, Path destination) throws IOException;
+    void store(Path source, Path destination) throws IOException;
+    void delete(Path path) throws IOException;
+    Resource loadAsResource(Path path) throws IOException;
+}

backend/src/main/resources/application.properties

@@ -0,0 +1,26 @@
+spring.application.name=backend
+server.port=8000
+
+# Database Configuration
+spring.datasource.url=${DB_URL:jdbc:postgresql://localhost:5432/printcalc}
+spring.datasource.username=${DB_USERNAME:printcalc}
+spring.datasource.password=${DB_PASSWORD:printcalc_secret}
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+
+
+# Slicer Configuration
+# Map SLICER_PATH env var if present (default to /opt/orcaslicer/AppRun or Mac path)
+slicer.path=${SLICER_PATH:/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer}
+profiles.root=${PROFILES_DIR:profiles}
+
+
+# File Upload Limits
+spring.servlet.multipart.max-file-size=200MB
+spring.servlet.multipart.max-request-size=200MB
+
+# ClamAV Configuration
+clamav.host=${CLAMAV_HOST:clamav}
+clamav.port=${CLAMAV_PORT:3310}
+clamav.enabled=${CLAMAV_ENABLED:false}
+