diff --git a/frontend/src/app/features/admin/pages/admin-dashboard.component.html b/frontend/src/app/features/admin/pages/admin-dashboard.component.html
index b3f156b..521def9 100644
--- a/frontend/src/app/features/admin/pages/admin-dashboard.component.html
+++ b/frontend/src/app/features/admin/pages/admin-dashboard.component.html
@@ -284,8 +284,8 @@
         <span class="filename">{{ item.originalFilename }}</span>
         <span class="file-color">
           {{ item.materialCode || "-" }} | {{ item.nozzleDiameterMm ?? "-" }} mm
-          | {{ item.layerHeightMm ?? "-" }} mm | {{ item.infillPercent ?? "-" }}%
-          | {{ item.infillPattern || "-" }} |
+          | {{ item.layerHeightMm ?? "-" }} mm |
+          {{ item.infillPercent ?? "-" }}% | {{ item.infillPattern || "-" }} |
           {{ item.supportsEnabled ? "Supporti ON" : "Supporti OFF" }}
         </span>
       </div>
diff --git a/frontend/src/app/features/admin/pages/admin-sessions.component.html b/frontend/src/app/features/admin/pages/admin-sessions.component.html
index 48ee86d..aea368c 100644
--- a/frontend/src/app/features/admin/pages/admin-sessions.component.html
+++ b/frontend/src/app/features/admin/pages/admin-sessions.component.html
@@ -149,7 +149,9 @@
                         {{ item.layerHeightMm ?? "-" }} mm |
                         {{ item.infillPercent ?? "-" }}% |
                         {{ item.infillPattern || "-" }} |
-                        {{ item.supportsEnabled ? "Supporti ON" : "Supporti OFF" }}
+                        {{
+                          item.supportsEnabled ? "Supporti ON" : "Supporti OFF"
+                        }}
                       </td>
                       <td>{{ item.status }}</td>
                       <td>{{ item.unitPriceChf | currency: "CHF" }}</td>
diff --git a/frontend/src/app/features/calculator/calculator-page.component.ts b/frontend/src/app/features/calculator/calculator-page.component.ts
index 8efa766..6737d44 100644
--- a/frontend/src/app/features/calculator/calculator-page.component.ts
+++ b/frontend/src/app/features/calculator/calculator-page.component.ts
@@ -72,7 +72,10 @@ export class CalculatorPageComponent implements OnInit {
     Record<string, { differences: string[] }>
   >({});
   private baselinePrintSettings: TrackedPrintSettings | null = null;
-  private baselineItemSettingsByFileName = new Map<string, TrackedPrintSettings>();
+  private baselineItemSettingsByFileName = new Map<
+    string,
+    TrackedPrintSettings
+  >();
 
   @ViewChild('uploadForm') uploadForm!: UploadFormComponent;
   @ViewChild('resultCol') resultCol!: ElementRef;
@@ -528,7 +531,9 @@ export class CalculatorPageComponent implements OnInit {
     });
   }
 
-  private toTrackedSettingsFromRequest(req: QuoteRequest): TrackedPrintSettings {
+  private toTrackedSettingsFromRequest(
+    req: QuoteRequest,
+  ): TrackedPrintSettings {
     return {
       mode: req.mode,
       material: this.normalizeString(req.material || 'PLA'),
@@ -590,17 +595,17 @@ export class CalculatorPageComponent implements OnInit {
     item: any,
     fallback: TrackedPrintSettings,
   ): TrackedPrintSettings {
-    const layer = this.normalizeNumber(item?.layerHeightMm, fallback.layerHeight, 3);
+    const layer = this.normalizeNumber(
+      item?.layerHeightMm,
+      fallback.layerHeight,
+      3,
+    );
     return {
       mode: this.mode(),
       material: this.normalizeString(item?.materialCode || fallback.material),
       quality: this.normalizeString(
         item?.quality ||
-          (layer >= 0.24
-            ? 'draft'
-            : layer <= 0.12
-              ? 'extra_fine'
-              : 'standard'),
+          (layer >= 0.24 ? 'draft' : layer <= 0.12 ? 'extra_fine' : 'standard'),
       ),
       nozzleDiameter: this.normalizeNumber(
         item?.nozzleDiameterMm,
@@ -616,9 +621,7 @@ export class CalculatorPageComponent implements OnInit {
       infillPattern: this.normalizeString(
         item?.infillPattern || fallback.infillPattern,
       ),
-      supportEnabled: Boolean(
-        item?.supportsEnabled ?? fallback.supportEnabled,
-      ),
+      supportEnabled: Boolean(item?.supportsEnabled ?? fallback.supportEnabled),
     };
   }
 
diff --git a/frontend/src/app/features/calculator/components/upload-form/upload-form.component.html b/frontend/src/app/features/calculator/components/upload-form/upload-form.component.html
index 843fb2e..25ab039 100644
--- a/frontend/src/app/features/calculator/components/upload-form/upload-form.component.html
+++ b/frontend/src/app/features/calculator/components/upload-form/upload-form.component.html
@@ -226,7 +226,12 @@
                 <label>
                   {{ "CALC.LAYER_HEIGHT" | translate }}
                   <select formControlName="layerHeight">
-                    @for (l of getLayerHeightOptionsForNozzle(form.get('nozzleDiameter')?.value); track l.value) {
+                    @for (
+                      l of getLayerHeightOptionsForNozzle(
+                        form.get("nozzleDiameter")?.value
+                      );
+                      track l.value
+                    ) {
                       <option [value]="l.value">{{ l.label }}</option>
                     }
                   </select>
diff --git a/frontend/src/app/features/calculator/components/upload-form/upload-form.component.ts b/frontend/src/app/features/calculator/components/upload-form/upload-form.component.ts
index 1fdd614..c0975eb 100644
--- a/frontend/src/app/features/calculator/components/upload-form/upload-form.component.ts
+++ b/frontend/src/app/features/calculator/components/upload-form/upload-form.component.ts
@@ -197,16 +197,28 @@ export class UploadFormComponent implements OnInit {
         this.fullMaterialOptions = options.materials || [];
 
         this.materials.set(
-          (options.materials || []).map((m) => ({ label: m.label, value: m.code })),
+          (options.materials || []).map((m) => ({
+            label: m.label,
+            value: m.code,
+          })),
         );
         this.qualities.set(
-          (options.qualities || []).map((q) => ({ label: q.label, value: q.id })),
+          (options.qualities || []).map((q) => ({
+            label: q.label,
+            value: q.id,
+          })),
         );
         this.infillPatterns.set(
-          (options.infillPatterns || []).map((p) => ({ label: p.label, value: p.id })),
+          (options.infillPatterns || []).map((p) => ({
+            label: p.label,
+            value: p.id,
+          })),
         );
         this.nozzleDiameters.set(
-          (options.nozzleDiameters || []).map((n) => ({ label: n.label, value: n.value })),
+          (options.nozzleDiameters || []).map((n) => ({
+            label: n.label,
+            value: n.value,
+          })),
         );
 
         this.allLayerHeights = (options.layerHeights || []).map((l) => ({
@@ -282,12 +294,19 @@ export class UploadFormComponent implements OnInit {
     return this.items()[index] || null;
   }
 
-  getVariantsForMaterial(materialCode: string | null | undefined): VariantOption[] {
-    const normalized = String(materialCode || '').trim().toUpperCase();
+  getVariantsForMaterial(
+    materialCode: string | null | undefined,
+  ): VariantOption[] {
+    const normalized = String(materialCode || '')
+      .trim()
+      .toUpperCase();
     if (!normalized) return [];
 
     const found = this.fullMaterialOptions.find(
-      (m) => String(m.code || '').trim().toUpperCase() === normalized,
+      (m) =>
+        String(m.code || '')
+          .trim()
+          .toUpperCase() === normalized,
     );
     return found?.variants || [];
   }
@@ -462,7 +481,9 @@ export class UploadFormComponent implements OnInit {
     const colorName =
       typeof newSelection === 'string' ? newSelection : newSelection.colorName;
     const filamentVariantId =
-      typeof newSelection === 'string' ? undefined : newSelection.filamentVariantId;
+      typeof newSelection === 'string'
+        ? undefined
+        : newSelection.filamentVariantId;
 
     this.items.update((current) => {
       if (index < 0 || index >= current.length) {
@@ -709,11 +730,17 @@ export class UploadFormComponent implements OnInit {
         });
     }
 
-    if (this.nozzleDiameters().length > 0 && !this.form.get('nozzleDiameter')?.value) {
+    if (
+      this.nozzleDiameters().length > 0 &&
+      !this.form.get('nozzleDiameter')?.value
+    ) {
       this.form.get('nozzleDiameter')?.setValue(0.4, { emitEvent: false });
     }
 
-    if (this.infillPatterns().length > 0 && !this.form.get('infillPattern')?.value) {
+    if (
+      this.infillPatterns().length > 0 &&
+      !this.form.get('infillPattern')?.value
+    ) {
       this.form
         .get('infillPattern')
         ?.setValue(this.infillPatterns()[0].value, { emitEvent: false });
@@ -726,7 +753,9 @@ export class UploadFormComponent implements OnInit {
     );
 
     if (this.mode() === 'easy') {
-      this.applyEasyPresetFromQuality(String(this.form.get('quality')?.value || 'standard'));
+      this.applyEasyPresetFromQuality(
+        String(this.form.get('quality')?.value || 'standard'),
+      );
     }
 
     this.emitPrintSettingsChange();
@@ -817,9 +846,18 @@ export class UploadFormComponent implements OnInit {
     return {
       material,
       quality,
-      nozzleDiameter: this.normalizeNumber(this.form.get('nozzleDiameter')?.value, 0.4),
-      layerHeight: this.normalizeNumber(this.form.get('layerHeight')?.value, 0.2),
-      infillDensity: this.normalizeNumber(this.form.get('infillDensity')?.value, 20),
+      nozzleDiameter: this.normalizeNumber(
+        this.form.get('nozzleDiameter')?.value,
+        0.4,
+      ),
+      layerHeight: this.normalizeNumber(
+        this.form.get('layerHeight')?.value,
+        0.2,
+      ),
+      infillDensity: this.normalizeNumber(
+        this.form.get('infillDensity')?.value,
+        20,
+      ),
       infillPattern: String(this.form.get('infillPattern')?.value || 'grid'),
       supportEnabled: Boolean(this.form.get('supportEnabled')?.value),
     };
@@ -829,7 +867,9 @@ export class UploadFormComponent implements OnInit {
     item: FormItem,
     defaults: ReturnType<UploadFormComponent['getCurrentGlobalItemDefaults']>,
   ): QuoteRequestItem {
-    const quality = this.normalizeQualityValue(item.quality || defaults.quality);
+    const quality = this.normalizeQualityValue(
+      item.quality || defaults.quality,
+    );
 
     if (this.mode() === 'easy') {
       const preset = this.easyModePresetForQuality(quality);
@@ -856,10 +896,16 @@ export class UploadFormComponent implements OnInit {
       color: item.color,
       filamentVariantId: item.filamentVariantId,
       supportEnabled: item.supportEnabled,
-      infillDensity: this.normalizeNumber(item.infillDensity, defaults.infillDensity),
+      infillDensity: this.normalizeNumber(
+        item.infillDensity,
+        defaults.infillDensity,
+      ),
       infillPattern: item.infillPattern || defaults.infillPattern,
       layerHeight: this.normalizeNumber(item.layerHeight, defaults.layerHeight),
-      nozzleDiameter: this.normalizeNumber(item.nozzleDiameter, defaults.nozzleDiameter),
+      nozzleDiameter: this.normalizeNumber(
+        item.nozzleDiameter,
+        defaults.nozzleDiameter,
+      ),
     };
   }
 
@@ -1029,11 +1075,15 @@ export class UploadFormComponent implements OnInit {
       return;
     }
 
-    const currentLayer = this.normalizeNumber(this.form.get('layerHeight')?.value, options[0].value as number);
+    const currentLayer = this.normalizeNumber(
+      this.form.get('layerHeight')?.value,
+      options[0].value as number,
+    );
     const allowed = options.some(
       (option) =>
-        Math.abs(this.normalizeNumber(option.value, currentLayer) - currentLayer) <
-        0.0001,
+        Math.abs(
+          this.normalizeNumber(option.value, currentLayer) - currentLayer,
+        ) < 0.0001,
     );
 
     if (allowed) {
@@ -1076,13 +1126,17 @@ export class UploadFormComponent implements OnInit {
     this.items().forEach((item) => {
       const differences: string[] = [];
 
-      if (this.normalizeText(item.material) !== this.normalizeText(baseline.material)) {
+      if (
+        this.normalizeText(item.material) !==
+        this.normalizeText(baseline.material)
+      ) {
         differences.push(item.material.toUpperCase());
       }
 
       if (this.mode() === 'easy') {
         if (
-          this.normalizeText(item.quality) !== this.normalizeText(baseline.quality)
+          this.normalizeText(item.quality) !==
+          this.normalizeText(baseline.quality)
         ) {
           differences.push(`quality:${item.quality}`);
         }
@@ -1173,19 +1227,28 @@ export class UploadFormComponent implements OnInit {
     return (
       this.normalizeText(a.material) === this.normalizeText(b.material) &&
       this.normalizeText(a.quality) === this.normalizeText(b.quality) &&
-      Math.abs(this.normalizeNumber(a.nozzleDiameter, 0.4) - this.normalizeNumber(b.nozzleDiameter, 0.4)) <
-        0.0001 &&
-      Math.abs(this.normalizeNumber(a.layerHeight, 0.2) - this.normalizeNumber(b.layerHeight, 0.2)) <
-        0.0001 &&
-      Math.abs(this.normalizeNumber(a.infillDensity, 20) - this.normalizeNumber(b.infillDensity, 20)) <
-        0.0001 &&
-      this.normalizeText(a.infillPattern) === this.normalizeText(b.infillPattern) &&
+      Math.abs(
+        this.normalizeNumber(a.nozzleDiameter, 0.4) -
+          this.normalizeNumber(b.nozzleDiameter, 0.4),
+      ) < 0.0001 &&
+      Math.abs(
+        this.normalizeNumber(a.layerHeight, 0.2) -
+          this.normalizeNumber(b.layerHeight, 0.2),
+      ) < 0.0001 &&
+      Math.abs(
+        this.normalizeNumber(a.infillDensity, 20) -
+          this.normalizeNumber(b.infillDensity, 20),
+      ) < 0.0001 &&
+      this.normalizeText(a.infillPattern) ===
+        this.normalizeText(b.infillPattern) &&
       Boolean(a.supportEnabled) === Boolean(b.supportEnabled)
     );
   }
 
   private normalizeQualityValue(value: any): string {
-    const normalized = String(value || 'standard').trim().toLowerCase();
+    const normalized = String(value || 'standard')
+      .trim()
+      .toLowerCase();
     if (normalized === 'high' || normalized === 'high_definition') {
       return 'extra_fine';
     }
diff --git a/frontend/src/app/features/calculator/services/quote-estimator.service.ts b/frontend/src/app/features/calculator/services/quote-estimator.service.ts
index 93ded57..1d91dad 100644
--- a/frontend/src/app/features/calculator/services/quote-estimator.service.ts
+++ b/frontend/src/app/features/calculator/services/quote-estimator.service.ts
@@ -127,16 +127,22 @@ export class QuoteEstimatorService {
 
   getOptions(): Observable<OptionsResponse> {
     const headers: any = {};
-    return this.http.get<OptionsResponse>(`${environment.apiUrl}/api/calculator/options`, {
-      headers,
-    });
+    return this.http.get<OptionsResponse>(
+      `${environment.apiUrl}/api/calculator/options`,
+      {
+        headers,
+      },
+    );
   }
 
   getQuoteSession(sessionId: string): Observable<any> {
     const headers: any = {};
-    return this.http.get(`${environment.apiUrl}/api/quote-sessions/${sessionId}`, {
-      headers,
-    });
+    return this.http.get(
+      `${environment.apiUrl}/api/quote-sessions/${sessionId}`,
+      {
+        headers,
+      },
+    );
   }
 
   updateLineItem(lineItemId: string, changes: any): Observable<any> {
@@ -175,10 +181,13 @@ export class QuoteEstimatorService {
 
   getOrderInvoice(orderId: string): Observable<Blob> {
     const headers: any = {};
-    return this.http.get(`${environment.apiUrl}/api/orders/${orderId}/invoice`, {
-      headers,
-      responseType: 'blob',
-    });
+    return this.http.get(
+      `${environment.apiUrl}/api/orders/${orderId}/invoice`,
+      {
+        headers,
+        responseType: 'blob',
+      },
+    );
   }
 
   getOrderConfirmation(orderId: string): Observable<Blob> {
@@ -226,7 +235,8 @@ export class QuoteEstimatorService {
 
             const emitProgress = () => {
               const avg = Math.round(
-                uploadProgress.reduce((sum, value) => sum + value, 0) / totalItems,
+                uploadProgress.reduce((sum, value) => sum + value, 0) /
+                  totalItems,
               );
               observer.next(avg);
             };
@@ -239,7 +249,9 @@ export class QuoteEstimatorService {
 
               const hasFailure = uploadResults.some((entry) => !entry.success);
               if (hasFailure) {
-                observer.error('One or more files failed during upload/analysis');
+                observer.error(
+                  'One or more files failed during upload/analysis',
+                );
                 return;
               }
 
@@ -412,8 +424,13 @@ export class QuoteEstimatorService {
     };
   }
 
-  private buildSettingsPayload(request: QuoteRequest, item: QuoteRequestItem): any {
-    const normalizedQuality = this.normalizeQuality(item.quality || request.quality);
+  private buildSettingsPayload(
+    request: QuoteRequest,
+    item: QuoteRequestItem,
+  ): any {
+    const normalizedQuality = this.normalizeQuality(
+      item.quality || request.quality,
+    );
     const easyPreset =
       request.mode === 'easy'
         ? this.buildEasyModePreset(normalizedQuality)
@@ -427,7 +444,10 @@ export class QuoteEstimatorService {
       quality: easyPreset ? easyPreset.quality : normalizedQuality,
       supportsEnabled: item.supportEnabled ?? request.supportEnabled ?? false,
       layerHeight:
-        easyPreset?.layerHeight ?? item.layerHeight ?? request.layerHeight ?? 0.2,
+        easyPreset?.layerHeight ??
+        item.layerHeight ??
+        request.layerHeight ??
+        0.2,
       infillDensity:
         easyPreset?.infillDensity ??
         item.infillDensity ??
@@ -447,7 +467,9 @@ export class QuoteEstimatorService {
   }
 
   private normalizeQuality(value: string | undefined): string {
-    const normalized = String(value || 'standard').trim().toLowerCase();
+    const normalized = String(value || 'standard')
+      .trim()
+      .toLowerCase();
     if (normalized === 'high' || normalized === 'high_definition') {
       return 'extra_fine';
     }
diff --git a/frontend/src/app/features/checkout/checkout.component.html b/frontend/src/app/features/checkout/checkout.component.html
index 0a85813..7023395 100644
--- a/frontend/src/app/features/checkout/checkout.component.html
+++ b/frontend/src/app/features/checkout/checkout.component.html
@@ -259,7 +259,10 @@
                   {{ item.printTimeSeconds / 3600 | number: "1.1-1" }}h |
                   {{ item.materialGrams | number: "1.0-0" }}g
                 </div>
-                <div class="item-preview" *ngIf="isCadSession() && isStlItem(item)">
+                <div
+                  class="item-preview"
+                  *ngIf="isCadSession() && isStlItem(item)"
+                >
                   <ng-container
                     *ngIf="previewFile(item) as itemPreview; else previewState"
                   >