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

@@ -301,6 +301,11 @@ public class OrderController {
         dto.setShippingCostChf(order.getShippingCostChf());
         dto.setDiscountChf(order.getDiscountChf());
         dto.setSubtotalChf(order.getSubtotalChf());
+        dto.setIsCadOrder(order.getIsCadOrder());
+        dto.setSourceRequestId(order.getSourceRequestId());
+        dto.setCadHours(order.getCadHours());
+        dto.setCadHourlyRateChf(order.getCadHourlyRateChf());
+        dto.setCadTotalChf(order.getCadTotalChf());
         dto.setTotalChf(order.getTotalChf());
         dto.setCreatedAt(order.getCreatedAt());
         dto.setShippingSameAsBilling(order.getShippingSameAsBilling());

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

@@ -15,6 +15,7 @@ import com.printcalculator.repository.QuoteLineItemRepository;
 import com.printcalculator.repository.QuoteSessionRepository;
 import com.printcalculator.service.OrcaProfileResolver;
 import com.printcalculator.service.QuoteCalculator;
+import com.printcalculator.service.QuoteSessionTotalsService;
 import com.printcalculator.service.SlicerService;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
@@ -42,6 +43,9 @@ import java.util.Optional;
 import java.util.Locale;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.UrlResource;
+import org.springframework.web.server.ResponseStatusException;
+
+import static org.springframework.http.HttpStatus.BAD_REQUEST;
 
 @RestController
 @RequestMapping("/api/quote-sessions")
@@ -59,6 +63,7 @@ public class QuoteSessionController {
     private final OrcaProfileResolver orcaProfileResolver;
     private final com.printcalculator.repository.PricingPolicyRepository pricingRepo;
     private final com.printcalculator.service.ClamAVService clamAVService;
+    private final QuoteSessionTotalsService quoteSessionTotalsService;
 
     public QuoteSessionController(QuoteSessionRepository sessionRepo,
                                   QuoteLineItemRepository lineItemRepo,
@@ -69,7 +74,8 @@ public class QuoteSessionController {
                                   FilamentVariantRepository variantRepo,
                                   OrcaProfileResolver orcaProfileResolver,
                                   com.printcalculator.repository.PricingPolicyRepository pricingRepo,
-                                  com.printcalculator.service.ClamAVService clamAVService) {
+                                  com.printcalculator.service.ClamAVService clamAVService,
+                                  QuoteSessionTotalsService quoteSessionTotalsService) {
         this.sessionRepo = sessionRepo;
         this.lineItemRepo = lineItemRepo;
         this.slicerService = slicerService;
@@ -80,6 +86,7 @@ public class QuoteSessionController {
         this.orcaProfileResolver = orcaProfileResolver;
         this.pricingRepo = pricingRepo;
         this.clamAVService = clamAVService;
+        this.quoteSessionTotalsService = quoteSessionTotalsService;
     }
 
     // 1. Start a new empty session
@@ -121,6 +128,9 @@ public class QuoteSessionController {
     // Helper to add item
     private QuoteLineItem addItemToSession(QuoteSession session, MultipartFile file, com.printcalculator.dto.PrintSettingsDto settings) throws IOException {
         if (file.isEmpty()) throw new IllegalArgumentException("File is empty");
+        if ("CONVERTED".equals(session.getStatus())) {
+            throw new ResponseStatusException(BAD_REQUEST, "Cannot modify a converted session");
+        }
 
         // Scan for virus
         clamAVService.scan(file.getInputStream());
@@ -148,8 +158,14 @@ public class QuoteSessionController {
 
         Path convertedPersistentPath = null;
         try {
-            // Apply Basic/Advanced Logic
+            boolean cadSession = "CAD_ACTIVE".equals(session.getStatus());
+
+            // In CAD sessions, print settings are locked server-side.
+            if (cadSession) {
+                enforceCadPrintSettings(session, settings);
+            } else {
                 applyPrintSettings(settings);
+            }
 
             BigDecimal nozzleDiameter = BigDecimal.valueOf(settings.getNozzleDiameter() != null ? settings.getNozzleDiameter() : 0.4);
 
@@ -159,7 +175,19 @@ public class QuoteSessionController {
             // Resolve selected filament variant
             FilamentVariant selectedVariant = resolveFilamentVariant(settings);
 
+            if (cadSession
+                    && session.getMaterialCode() != null
+                    && selectedVariant.getFilamentMaterialType() != null
+                    && selectedVariant.getFilamentMaterialType().getMaterialCode() != null) {
+                String lockedMaterial = normalizeRequestedMaterialCode(session.getMaterialCode());
+                String selectedMaterial = normalizeRequestedMaterialCode(selectedVariant.getFilamentMaterialType().getMaterialCode());
+                if (!lockedMaterial.equals(selectedMaterial)) {
+                    throw new ResponseStatusException(BAD_REQUEST, "Selected filament does not match locked CAD material");
+                }
+            }
+
             // Update session global settings from the most recent item added
+            if (!cadSession) {
                 session.setMaterialCode(selectedVariant.getFilamentMaterialType().getMaterialCode());
                 session.setNozzleDiameterMm(nozzleDiameter);
                 session.setLayerHeightMm(BigDecimal.valueOf(settings.getLayerHeight() != null ? settings.getLayerHeight() : 0.2));
@@ -167,6 +195,7 @@ public class QuoteSessionController {
                 session.setInfillPercent(settings.getInfillDensity() != null ? settings.getInfillDensity().intValue() : 20);
                 session.setSupportsEnabled(settings.getSupportsEnabled() != null ? settings.getSupportsEnabled() : false);
                 sessionRepo.save(session);
+            }
 
             OrcaProfileResolver.ResolvedProfiles profiles = orcaProfileResolver.resolve(machine, nozzleDiameter, selectedVariant);
             String machineProfile = profiles.machineProfileName();
@@ -290,6 +319,16 @@ public class QuoteSessionController {
         }
     }
 
+    private void enforceCadPrintSettings(QuoteSession session, com.printcalculator.dto.PrintSettingsDto settings) {
+        settings.setComplexityMode("ADVANCED");
+        settings.setMaterial(session.getMaterialCode() != null ? session.getMaterialCode() : "PLA");
+        settings.setNozzleDiameter(session.getNozzleDiameterMm() != null ? session.getNozzleDiameterMm().doubleValue() : 0.4);
+        settings.setLayerHeight(session.getLayerHeightMm() != null ? session.getLayerHeightMm().doubleValue() : 0.2);
+        settings.setInfillPattern(session.getInfillPattern() != null ? session.getInfillPattern() : "grid");
+        settings.setInfillDensity(session.getInfillPercent() != null ? session.getInfillPercent().doubleValue() : 20.0);
+        settings.setSupportsEnabled(Boolean.TRUE.equals(session.getSupportsEnabled()));
+    }
+
     private PrinterMachine resolvePrinterMachine(Long printerMachineId) {
         if (printerMachineId != null) {
             PrinterMachine selected = machineRepo.findById(printerMachineId)
@@ -344,6 +383,32 @@ public class QuoteSessionController {
                 .replaceAll("\\s+", " ");
     }
 
+    private int parsePositiveQuantity(Object raw) {
+        if (raw == null) {
+            throw new ResponseStatusException(BAD_REQUEST, "Quantity is required");
+        }
+
+        int quantity;
+        if (raw instanceof Number number) {
+            double numericValue = number.doubleValue();
+            if (!Double.isFinite(numericValue)) {
+                throw new ResponseStatusException(BAD_REQUEST, "Quantity must be a finite number");
+            }
+            quantity = (int) Math.floor(numericValue);
+        } else {
+            try {
+                quantity = Integer.parseInt(String.valueOf(raw).trim());
+            } catch (NumberFormatException ex) {
+                throw new ResponseStatusException(BAD_REQUEST, "Quantity must be an integer");
+            }
+        }
+
+        if (quantity < 1) {
+            throw new ResponseStatusException(BAD_REQUEST, "Quantity must be >= 1");
+        }
+        return quantity;
+    }
+
     // 3. Update Line Item
     @PatchMapping("/line-items/{lineItemId}")
     @Transactional
@@ -354,11 +419,19 @@ public class QuoteSessionController {
         QuoteLineItem item = lineItemRepo.findById(lineItemId)
                 .orElseThrow(() -> new RuntimeException("Item not found"));
 
+        QuoteSession session = item.getQuoteSession();
+        if ("CONVERTED".equals(session.getStatus())) {
+            throw new ResponseStatusException(BAD_REQUEST, "Cannot modify a converted session");
+        }
+        
         if (updates.containsKey("quantity")) {
-            item.setQuantity((Integer) updates.get("quantity"));
+            item.setQuantity(parsePositiveQuantity(updates.get("quantity")));
         }
         if (updates.containsKey("color_code")) {
-            item.setColorCode((String) updates.get("color_code"));
+            Object colorValue = updates.get("color_code");
+            if (colorValue != null) {
+                item.setColorCode(String.valueOf(colorValue));
+            }
         }
         
         // Recalculate price if needed? 
@@ -394,25 +467,7 @@ public class QuoteSessionController {
                 .orElseThrow(() -> new RuntimeException("Session not found"));
         
         List<QuoteLineItem> items = lineItemRepo.findByQuoteSessionId(id);
-        
+        QuoteSessionTotalsService.QuoteSessionTotals totals = quoteSessionTotalsService.compute(session, items);
-        // Calculate Totals and global session hours
-        BigDecimal itemsTotal = BigDecimal.ZERO;
-        BigDecimal totalSeconds = BigDecimal.ZERO;
-
-        for (QuoteLineItem item : items) {
-            BigDecimal lineTotal = item.getUnitPriceChf().multiply(BigDecimal.valueOf(item.getQuantity()));
-            itemsTotal = itemsTotal.add(lineTotal);
-            
-            if (item.getPrintTimeSeconds() != null) {
-                totalSeconds = totalSeconds.add(BigDecimal.valueOf(item.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(item.getQuantity())));
-            }
-        }
-        
-        BigDecimal totalHours = totalSeconds.divide(BigDecimal.valueOf(3600), 4, RoundingMode.HALF_UP);
-        com.printcalculator.entity.PricingPolicy policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
-        BigDecimal globalMachineCost = quoteCalculator.calculateSessionMachineCost(policy, totalHours);
-        
-        itemsTotal = itemsTotal.add(globalMachineCost);
         
         // Map items to DTO to embed distributed machine cost
         List<Map<String, Object>> itemsDto = new ArrayList<>();
@@ -428,57 +483,28 @@ public class QuoteSessionController {
             dto.put("status", item.getStatus());
             dto.put("convertedStoredPath", extractConvertedStoredPath(item));
             
-            BigDecimal unitPrice = item.getUnitPriceChf();
+            BigDecimal unitPrice = item.getUnitPriceChf() != null ? item.getUnitPriceChf() : BigDecimal.ZERO;
-            if (totalSeconds.compareTo(BigDecimal.ZERO) > 0 && item.getPrintTimeSeconds() != null) {
+            int quantity = item.getQuantity() != null && item.getQuantity() > 0 ? item.getQuantity() : 1;
-                BigDecimal itemSeconds = BigDecimal.valueOf(item.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(item.getQuantity()));
+            if (totals.totalPrintSeconds().compareTo(BigDecimal.ZERO) > 0 && item.getPrintTimeSeconds() != null) {
-                BigDecimal share = itemSeconds.divide(totalSeconds, 8, RoundingMode.HALF_UP);
+                BigDecimal itemSeconds = BigDecimal.valueOf(item.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(quantity));
-                BigDecimal itemMachineCost = globalMachineCost.multiply(share);
+                BigDecimal share = itemSeconds.divide(totals.totalPrintSeconds(), 8, RoundingMode.HALF_UP);
-                BigDecimal unitMachineCost = itemMachineCost.divide(BigDecimal.valueOf(item.getQuantity()), 2, RoundingMode.HALF_UP);
+                BigDecimal itemMachineCost = totals.globalMachineCostChf().multiply(share);
+                BigDecimal unitMachineCost = itemMachineCost.divide(BigDecimal.valueOf(quantity), 2, RoundingMode.HALF_UP);
                 unitPrice = unitPrice.add(unitMachineCost);
             }
             dto.put("unitPriceChf", unitPrice);
             itemsDto.add(dto);
         }
         
-        BigDecimal setupFee = session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO;
-        
-        // Calculate shipping cost based on dimensions
-        boolean exceedsBaseSize = false;
-        for (QuoteLineItem item : items) {
-            BigDecimal x = item.getBoundingBoxXMm() != null ? item.getBoundingBoxXMm() : BigDecimal.ZERO;
-            BigDecimal y = item.getBoundingBoxYMm() != null ? item.getBoundingBoxYMm() : BigDecimal.ZERO;
-            BigDecimal z = item.getBoundingBoxZMm() != null ? item.getBoundingBoxZMm() : BigDecimal.ZERO;
-            
-            BigDecimal[] dims = {x, y, z};
-            java.util.Arrays.sort(dims);
-            
-            if (dims[2].compareTo(BigDecimal.valueOf(250.0)) > 0 ||
-                dims[1].compareTo(BigDecimal.valueOf(176.0)) > 0 ||
-                dims[0].compareTo(BigDecimal.valueOf(20.0)) > 0) {
-                exceedsBaseSize = true;
-                break;
-            }
-        }
-        int totalQuantity = items.stream()
-                .mapToInt(i -> i.getQuantity() != null ? i.getQuantity() : 1)
-                .sum();
-
-        BigDecimal shippingCostChf;
-        if (exceedsBaseSize) {
-            shippingCostChf = totalQuantity > 5 ? BigDecimal.valueOf(9.00) : BigDecimal.valueOf(4.00);
-        } else {
-            shippingCostChf = BigDecimal.valueOf(2.00);
-        }
-
-        BigDecimal grandTotal = itemsTotal.add(setupFee).add(shippingCostChf);
-        
         Map<String, Object> response = new HashMap<>();
         response.put("session", session);
         response.put("items", itemsDto);
-        response.put("itemsTotalChf", itemsTotal); // Includes the base cost of all items + the global tiered machine cost
+        response.put("printItemsTotalChf", totals.printItemsTotalChf());
-        response.put("shippingCostChf", shippingCostChf);
+        response.put("cadTotalChf", totals.cadTotalChf());
-        response.put("globalMachineCostChf", globalMachineCost); // Provide it so frontend knows how much it was (optional now)
+        response.put("itemsTotalChf", totals.itemsTotalChf());
-        response.put("grandTotalChf", grandTotal);
+        response.put("shippingCostChf", totals.shippingCostChf());
+        response.put("globalMachineCostChf", totals.globalMachineCostChf());
+        response.put("grandTotalChf", totals.grandTotalChf());
         
         return ResponseEntity.ok(response);
     }

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

@@ -3,6 +3,8 @@ package com.printcalculator.controller.admin;
 import com.printcalculator.dto.AdminContactRequestDto;
 import com.printcalculator.dto.AdminContactRequestAttachmentDto;
 import com.printcalculator.dto.AdminContactRequestDetailDto;
+import com.printcalculator.dto.AdminCadInvoiceCreateRequest;
+import com.printcalculator.dto.AdminCadInvoiceDto;
 import com.printcalculator.dto.AdminFilamentStockDto;
 import com.printcalculator.dto.AdminQuoteSessionDto;
 import com.printcalculator.dto.AdminUpdateContactRequestStatusRequest;
@@ -10,13 +12,18 @@ import com.printcalculator.entity.CustomQuoteRequest;
 import com.printcalculator.entity.CustomQuoteRequestAttachment;
 import com.printcalculator.entity.FilamentVariant;
 import com.printcalculator.entity.FilamentVariantStockKg;
+import com.printcalculator.entity.Order;
+import com.printcalculator.entity.QuoteLineItem;
 import com.printcalculator.entity.QuoteSession;
 import com.printcalculator.repository.CustomQuoteRequestAttachmentRepository;
 import com.printcalculator.repository.CustomQuoteRequestRepository;
 import com.printcalculator.repository.FilamentVariantRepository;
 import com.printcalculator.repository.FilamentVariantStockKgRepository;
 import com.printcalculator.repository.OrderRepository;
+import com.printcalculator.repository.PricingPolicyRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
 import com.printcalculator.repository.QuoteSessionRepository;
+import com.printcalculator.service.QuoteSessionTotalsService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.core.io.Resource;
@@ -31,6 +38,7 @@ import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -39,6 +47,7 @@ import org.springframework.web.server.ResponseStatusException;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.net.MalformedURLException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -75,7 +84,10 @@ public class AdminOperationsController {
     private final CustomQuoteRequestRepository customQuoteRequestRepo;
     private final CustomQuoteRequestAttachmentRepository customQuoteRequestAttachmentRepo;
     private final QuoteSessionRepository quoteSessionRepo;
+    private final QuoteLineItemRepository quoteLineItemRepo;
     private final OrderRepository orderRepo;
+    private final PricingPolicyRepository pricingRepo;
+    private final QuoteSessionTotalsService quoteSessionTotalsService;
 
     public AdminOperationsController(
             FilamentVariantStockKgRepository filamentStockRepo,
@@ -83,14 +95,20 @@ public class AdminOperationsController {
             CustomQuoteRequestRepository customQuoteRequestRepo,
             CustomQuoteRequestAttachmentRepository customQuoteRequestAttachmentRepo,
             QuoteSessionRepository quoteSessionRepo,
-            OrderRepository orderRepo
+            QuoteLineItemRepository quoteLineItemRepo,
+            OrderRepository orderRepo,
+            PricingPolicyRepository pricingRepo,
+            QuoteSessionTotalsService quoteSessionTotalsService
     ) {
         this.filamentStockRepo = filamentStockRepo;
         this.filamentVariantRepo = filamentVariantRepo;
         this.customQuoteRequestRepo = customQuoteRequestRepo;
         this.customQuoteRequestAttachmentRepo = customQuoteRequestAttachmentRepo;
         this.quoteSessionRepo = quoteSessionRepo;
+        this.quoteLineItemRepo = quoteLineItemRepo;
         this.orderRepo = orderRepo;
+        this.pricingRepo = pricingRepo;
+        this.quoteSessionTotalsService = quoteSessionTotalsService;
     }
 
     @GetMapping("/filament-stock")
@@ -279,6 +297,83 @@ public class AdminOperationsController {
         return ResponseEntity.ok(response);
     }
 
+    @GetMapping("/cad-invoices")
+    public ResponseEntity<List<AdminCadInvoiceDto>> getCadInvoices() {
+        List<AdminCadInvoiceDto> response = quoteSessionRepo.findByStatusInOrderByCreatedAtDesc(List.of("CAD_ACTIVE", "CONVERTED"))
+                .stream()
+                .filter(this::isCadSessionRecord)
+                .map(this::toCadInvoiceDto)
+                .toList();
+        return ResponseEntity.ok(response);
+    }
+
+    @PostMapping("/cad-invoices")
+    @Transactional
+    public ResponseEntity<AdminCadInvoiceDto> createOrUpdateCadInvoice(
+            @RequestBody AdminCadInvoiceCreateRequest payload
+    ) {
+        if (payload == null || payload.getCadHours() == null) {
+            throw new ResponseStatusException(BAD_REQUEST, "cadHours is required");
+        }
+
+        BigDecimal cadHours = payload.getCadHours().setScale(2, RoundingMode.HALF_UP);
+        if (cadHours.compareTo(BigDecimal.ZERO) <= 0) {
+            throw new ResponseStatusException(BAD_REQUEST, "cadHours must be > 0");
+        }
+
+        BigDecimal cadRate = payload.getCadHourlyRateChf();
+        if (cadRate == null || cadRate.compareTo(BigDecimal.ZERO) <= 0) {
+            var policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
+            cadRate = policy != null && policy.getCadCostChfPerHour() != null
+                    ? policy.getCadCostChfPerHour()
+                    : BigDecimal.ZERO;
+        }
+        cadRate = cadRate.setScale(2, RoundingMode.HALF_UP);
+
+        QuoteSession session;
+        if (payload.getSessionId() != null) {
+            session = quoteSessionRepo.findById(payload.getSessionId())
+                    .orElseThrow(() -> new ResponseStatusException(NOT_FOUND, "Session not found"));
+        } else {
+            session = new QuoteSession();
+            session.setStatus("CAD_ACTIVE");
+            session.setPricingVersion("v1");
+            session.setMaterialCode("PLA");
+            session.setNozzleDiameterMm(BigDecimal.valueOf(0.4));
+            session.setLayerHeightMm(BigDecimal.valueOf(0.2));
+            session.setInfillPattern("grid");
+            session.setInfillPercent(20);
+            session.setSupportsEnabled(false);
+            session.setSetupCostChf(BigDecimal.ZERO);
+            session.setCreatedAt(OffsetDateTime.now());
+            session.setExpiresAt(OffsetDateTime.now().plusDays(30));
+        }
+
+        if ("CONVERTED".equals(session.getStatus())) {
+            throw new ResponseStatusException(CONFLICT, "Session already converted to order");
+        }
+
+        if (payload.getSourceRequestId() != null) {
+            if (!customQuoteRequestRepo.existsById(payload.getSourceRequestId())) {
+                throw new ResponseStatusException(NOT_FOUND, "Source request not found");
+            }
+            session.setSourceRequestId(payload.getSourceRequestId());
+        } else {
+            session.setSourceRequestId(null);
+        }
+
+        session.setStatus("CAD_ACTIVE");
+        session.setCadHours(cadHours);
+        session.setCadHourlyRateChf(cadRate);
+        if (payload.getNotes() != null) {
+            String trimmedNotes = payload.getNotes().trim();
+            session.setNotes(trimmedNotes.isEmpty() ? null : trimmedNotes);
+        }
+
+        QuoteSession saved = quoteSessionRepo.save(session);
+        return ResponseEntity.ok(toCadInvoiceDto(saved));
+    }
+
     @DeleteMapping("/sessions/{sessionId}")
     @Transactional
     public ResponseEntity<Void> deleteQuoteSession(@PathVariable UUID sessionId) {
@@ -347,6 +442,48 @@ public class AdminOperationsController {
         dto.setCreatedAt(session.getCreatedAt());
         dto.setExpiresAt(session.getExpiresAt());
         dto.setConvertedOrderId(session.getConvertedOrderId());
+        dto.setSourceRequestId(session.getSourceRequestId());
+        dto.setCadHours(session.getCadHours());
+        dto.setCadHourlyRateChf(session.getCadHourlyRateChf());
+        dto.setCadTotalChf(quoteSessionTotalsService.calculateCadTotal(session));
+        return dto;
+    }
+
+    private boolean isCadSessionRecord(QuoteSession session) {
+        if ("CAD_ACTIVE".equals(session.getStatus())) {
+            return true;
+        }
+        if (!"CONVERTED".equals(session.getStatus())) {
+            return false;
+        }
+        BigDecimal cadHours = session.getCadHours() != null ? session.getCadHours() : BigDecimal.ZERO;
+        return cadHours.compareTo(BigDecimal.ZERO) > 0 || session.getSourceRequestId() != null;
+    }
+
+    private AdminCadInvoiceDto toCadInvoiceDto(QuoteSession session) {
+        List<QuoteLineItem> items = quoteLineItemRepo.findByQuoteSessionId(session.getId());
+        QuoteSessionTotalsService.QuoteSessionTotals totals = quoteSessionTotalsService.compute(session, items);
+
+        AdminCadInvoiceDto dto = new AdminCadInvoiceDto();
+        dto.setSessionId(session.getId());
+        dto.setSessionStatus(session.getStatus());
+        dto.setSourceRequestId(session.getSourceRequestId());
+        dto.setCadHours(session.getCadHours() != null ? session.getCadHours() : BigDecimal.ZERO);
+        dto.setCadHourlyRateChf(session.getCadHourlyRateChf() != null ? session.getCadHourlyRateChf() : BigDecimal.ZERO);
+        dto.setCadTotalChf(totals.cadTotalChf());
+        dto.setPrintItemsTotalChf(totals.printItemsTotalChf());
+        dto.setSetupCostChf(totals.setupCostChf());
+        dto.setShippingCostChf(totals.shippingCostChf());
+        dto.setGrandTotalChf(totals.grandTotalChf());
+        dto.setConvertedOrderId(session.getConvertedOrderId());
+        dto.setCheckoutPath("/checkout/cad?session=" + session.getId());
+        dto.setNotes(session.getNotes());
+        dto.setCreatedAt(session.getCreatedAt());
+
+        if (session.getConvertedOrderId() != null) {
+            Order order = orderRepo.findById(session.getConvertedOrderId()).orElse(null);
+            dto.setConvertedOrderStatus(order != null ? order.getStatus() : null);
+        }
         return dto;
     }
 

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

@@ -214,6 +214,11 @@ public class AdminOrderController {
         dto.setShippingCostChf(order.getShippingCostChf());
         dto.setDiscountChf(order.getDiscountChf());
         dto.setSubtotalChf(order.getSubtotalChf());
+        dto.setIsCadOrder(order.getIsCadOrder());
+        dto.setSourceRequestId(order.getSourceRequestId());
+        dto.setCadHours(order.getCadHours());
+        dto.setCadHourlyRateChf(order.getCadHourlyRateChf());
+        dto.setCadTotalChf(order.getCadTotalChf());
         dto.setTotalChf(order.getTotalChf());
         dto.setCreatedAt(order.getCreatedAt());
         dto.setShippingSameAsBilling(order.getShippingSameAsBilling());

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

@@ -0,0 +1,52 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.util.UUID;
+
+public class AdminCadInvoiceCreateRequest {
+    private UUID sessionId;
+    private UUID sourceRequestId;
+    private BigDecimal cadHours;
+    private BigDecimal cadHourlyRateChf;
+    private String notes;
+
+    public UUID getSessionId() {
+        return sessionId;
+    }
+
+    public void setSessionId(UUID sessionId) {
+        this.sessionId = sessionId;
+    }
+
+    public UUID getSourceRequestId() {
+        return sourceRequestId;
+    }
+
+    public void setSourceRequestId(UUID sourceRequestId) {
+        this.sourceRequestId = sourceRequestId;
+    }
+
+    public BigDecimal getCadHours() {
+        return cadHours;
+    }
+
+    public void setCadHours(BigDecimal cadHours) {
+        this.cadHours = cadHours;
+    }
+
+    public BigDecimal getCadHourlyRateChf() {
+        return cadHourlyRateChf;
+    }
+
+    public void setCadHourlyRateChf(BigDecimal cadHourlyRateChf) {
+        this.cadHourlyRateChf = cadHourlyRateChf;
+    }
+
+    public String getNotes() {
+        return notes;
+    }
+
+    public void setNotes(String notes) {
+        this.notes = notes;
+    }
+}

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

@@ -0,0 +1,143 @@
+package com.printcalculator.dto;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.UUID;
+
+public class AdminCadInvoiceDto {
+    private UUID sessionId;
+    private String sessionStatus;
+    private UUID sourceRequestId;
+    private BigDecimal cadHours;
+    private BigDecimal cadHourlyRateChf;
+    private BigDecimal cadTotalChf;
+    private BigDecimal printItemsTotalChf;
+    private BigDecimal setupCostChf;
+    private BigDecimal shippingCostChf;
+    private BigDecimal grandTotalChf;
+    private UUID convertedOrderId;
+    private String convertedOrderStatus;
+    private String checkoutPath;
+    private String notes;
+    private OffsetDateTime createdAt;
+
+    public UUID getSessionId() {
+        return sessionId;
+    }
+
+    public void setSessionId(UUID sessionId) {
+        this.sessionId = sessionId;
+    }
+
+    public String getSessionStatus() {
+        return sessionStatus;
+    }
+
+    public void setSessionStatus(String sessionStatus) {
+        this.sessionStatus = sessionStatus;
+    }
+
+    public UUID getSourceRequestId() {
+        return sourceRequestId;
+    }
+
+    public void setSourceRequestId(UUID sourceRequestId) {
+        this.sourceRequestId = sourceRequestId;
+    }
+
+    public BigDecimal getCadHours() {
+        return cadHours;
+    }
+
+    public void setCadHours(BigDecimal cadHours) {
+        this.cadHours = cadHours;
+    }
+
+    public BigDecimal getCadHourlyRateChf() {
+        return cadHourlyRateChf;
+    }
+
+    public void setCadHourlyRateChf(BigDecimal cadHourlyRateChf) {
+        this.cadHourlyRateChf = cadHourlyRateChf;
+    }
+
+    public BigDecimal getCadTotalChf() {
+        return cadTotalChf;
+    }
+
+    public void setCadTotalChf(BigDecimal cadTotalChf) {
+        this.cadTotalChf = cadTotalChf;
+    }
+
+    public BigDecimal getPrintItemsTotalChf() {
+        return printItemsTotalChf;
+    }
+
+    public void setPrintItemsTotalChf(BigDecimal printItemsTotalChf) {
+        this.printItemsTotalChf = printItemsTotalChf;
+    }
+
+    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 getGrandTotalChf() {
+        return grandTotalChf;
+    }
+
+    public void setGrandTotalChf(BigDecimal grandTotalChf) {
+        this.grandTotalChf = grandTotalChf;
+    }
+
+    public UUID getConvertedOrderId() {
+        return convertedOrderId;
+    }
+
+    public void setConvertedOrderId(UUID convertedOrderId) {
+        this.convertedOrderId = convertedOrderId;
+    }
+
+    public String getConvertedOrderStatus() {
+        return convertedOrderStatus;
+    }
+
+    public void setConvertedOrderStatus(String convertedOrderStatus) {
+        this.convertedOrderStatus = convertedOrderStatus;
+    }
+
+    public String getCheckoutPath() {
+        return checkoutPath;
+    }
+
+    public void setCheckoutPath(String checkoutPath) {
+        this.checkoutPath = checkoutPath;
+    }
+
+    public String getNotes() {
+        return notes;
+    }
+
+    public void setNotes(String notes) {
+        this.notes = notes;
+    }
+
+    public OffsetDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(OffsetDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+}

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

@@ -1,6 +1,7 @@
 package com.printcalculator.dto;
 
 import java.time.OffsetDateTime;
+import java.math.BigDecimal;
 import java.util.UUID;
 
 public class AdminQuoteSessionDto {
@@ -10,6 +11,10 @@ public class AdminQuoteSessionDto {
     private OffsetDateTime createdAt;
     private OffsetDateTime expiresAt;
     private UUID convertedOrderId;
+    private UUID sourceRequestId;
+    private BigDecimal cadHours;
+    private BigDecimal cadHourlyRateChf;
+    private BigDecimal cadTotalChf;
 
     public UUID getId() {
         return id;
@@ -58,4 +63,36 @@ public class AdminQuoteSessionDto {
     public void setConvertedOrderId(UUID convertedOrderId) {
         this.convertedOrderId = convertedOrderId;
     }
+
+    public UUID getSourceRequestId() {
+        return sourceRequestId;
+    }
+
+    public void setSourceRequestId(UUID sourceRequestId) {
+        this.sourceRequestId = sourceRequestId;
+    }
+
+    public BigDecimal getCadHours() {
+        return cadHours;
+    }
+
+    public void setCadHours(BigDecimal cadHours) {
+        this.cadHours = cadHours;
+    }
+
+    public BigDecimal getCadHourlyRateChf() {
+        return cadHourlyRateChf;
+    }
+
+    public void setCadHourlyRateChf(BigDecimal cadHourlyRateChf) {
+        this.cadHourlyRateChf = cadHourlyRateChf;
+    }
+
+    public BigDecimal getCadTotalChf() {
+        return cadTotalChf;
+    }
+
+    public void setCadTotalChf(BigDecimal cadTotalChf) {
+        this.cadTotalChf = cadTotalChf;
+    }
 }

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

@@ -23,6 +23,11 @@ public class OrderDto {
     private BigDecimal shippingCostChf;
     private BigDecimal discountChf;
     private BigDecimal subtotalChf;
+    private Boolean isCadOrder;
+    private UUID sourceRequestId;
+    private BigDecimal cadHours;
+    private BigDecimal cadHourlyRateChf;
+    private BigDecimal cadTotalChf;
     private BigDecimal totalChf;
     private OffsetDateTime createdAt;
     private String printMaterialCode;
@@ -85,6 +90,21 @@ public class OrderDto {
     public BigDecimal getSubtotalChf() { return subtotalChf; }
     public void setSubtotalChf(BigDecimal subtotalChf) { this.subtotalChf = subtotalChf; }
 
+    public Boolean getIsCadOrder() { return isCadOrder; }
+    public void setIsCadOrder(Boolean isCadOrder) { this.isCadOrder = isCadOrder; }
+
+    public UUID getSourceRequestId() { return sourceRequestId; }
+    public void setSourceRequestId(UUID sourceRequestId) { this.sourceRequestId = sourceRequestId; }
+
+    public BigDecimal getCadHours() { return cadHours; }
+    public void setCadHours(BigDecimal cadHours) { this.cadHours = cadHours; }
+
+    public BigDecimal getCadHourlyRateChf() { return cadHourlyRateChf; }
+    public void setCadHourlyRateChf(BigDecimal cadHourlyRateChf) { this.cadHourlyRateChf = cadHourlyRateChf; }
+
+    public BigDecimal getCadTotalChf() { return cadTotalChf; }
+    public void setCadTotalChf(BigDecimal cadTotalChf) { this.cadTotalChf = cadTotalChf; }
+
     public BigDecimal getTotalChf() { return totalChf; }
     public void setTotalChf(BigDecimal totalChf) { this.totalChf = totalChf; }
 

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

@@ -119,6 +119,23 @@ public class Order {
     @Column(name = "subtotal_chf", nullable = false, precision = 12, scale = 2)
     private BigDecimal subtotalChf;
 
+    @ColumnDefault("false")
+    @Column(name = "is_cad_order", nullable = false)
+    private Boolean isCadOrder;
+
+    @Column(name = "source_request_id")
+    private UUID sourceRequestId;
+
+    @Column(name = "cad_hours", precision = 10, scale = 2)
+    private BigDecimal cadHours;
+
+    @Column(name = "cad_hourly_rate_chf", precision = 10, scale = 2)
+    private BigDecimal cadHourlyRateChf;
+
+    @ColumnDefault("0.00")
+    @Column(name = "cad_total_chf", nullable = false, precision = 12, scale = 2)
+    private BigDecimal cadTotalChf;
+
     @ColumnDefault("0.00")
     @Column(name = "total_chf", nullable = false, precision = 12, scale = 2)
     private BigDecimal totalChf;
@@ -400,6 +417,46 @@ public class Order {
         this.subtotalChf = subtotalChf;
     }
 
+    public Boolean getIsCadOrder() {
+        return isCadOrder;
+    }
+
+    public void setIsCadOrder(Boolean isCadOrder) {
+        this.isCadOrder = isCadOrder;
+    }
+
+    public UUID getSourceRequestId() {
+        return sourceRequestId;
+    }
+
+    public void setSourceRequestId(UUID sourceRequestId) {
+        this.sourceRequestId = sourceRequestId;
+    }
+
+    public BigDecimal getCadHours() {
+        return cadHours;
+    }
+
+    public void setCadHours(BigDecimal cadHours) {
+        this.cadHours = cadHours;
+    }
+
+    public BigDecimal getCadHourlyRateChf() {
+        return cadHourlyRateChf;
+    }
+
+    public void setCadHourlyRateChf(BigDecimal cadHourlyRateChf) {
+        this.cadHourlyRateChf = cadHourlyRateChf;
+    }
+
+    public BigDecimal getCadTotalChf() {
+        return cadTotalChf;
+    }
+
+    public void setCadTotalChf(BigDecimal cadTotalChf) {
+        this.cadTotalChf = cadTotalChf;
+    }
+
     public BigDecimal getTotalChf() {
         return totalChf;
     }

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

@@ -61,6 +61,15 @@ public class QuoteSession {
     @Column(name = "converted_order_id")
     private UUID convertedOrderId;
 
+    @Column(name = "source_request_id")
+    private UUID sourceRequestId;
+
+    @Column(name = "cad_hours", precision = 10, scale = 2)
+    private BigDecimal cadHours;
+
+    @Column(name = "cad_hourly_rate_chf", precision = 10, scale = 2)
+    private BigDecimal cadHourlyRateChf;
+
     public UUID getId() {
         return id;
     }
@@ -173,4 +182,28 @@ public class QuoteSession {
         this.convertedOrderId = convertedOrderId;
     }
 
+    public UUID getSourceRequestId() {
+        return sourceRequestId;
+    }
+
+    public void setSourceRequestId(UUID sourceRequestId) {
+        this.sourceRequestId = sourceRequestId;
+    }
+
+    public BigDecimal getCadHours() {
+        return cadHours;
+    }
+
+    public void setCadHours(BigDecimal cadHours) {
+        this.cadHours = cadHours;
+    }
+
+    public BigDecimal getCadHourlyRateChf() {
+        return cadHourlyRateChf;
+    }
+
+    public void setCadHourlyRateChf(BigDecimal cadHourlyRateChf) {
+        this.cadHourlyRateChf = cadHourlyRateChf;
+    }
+
 }

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

@@ -8,4 +8,6 @@ import java.util.UUID;
 
 public interface QuoteSessionRepository extends JpaRepository<QuoteSession, UUID> {
     List<QuoteSession> findByCreatedAtBefore(java.time.OffsetDateTime cutoff);
+
+    List<QuoteSession> findByStatusInOrderByCreatedAtDesc(List<String> statuses);
 }

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

@@ -14,6 +14,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
 
 import com.printcalculator.entity.Order;
 import com.printcalculator.entity.OrderItem;
@@ -95,6 +97,17 @@ public class InvoicePdfRenderingService {
             return line;
         }).collect(Collectors.toList());
 
+        if (order.getCadTotalChf() != null && order.getCadTotalChf().compareTo(BigDecimal.ZERO) > 0) {
+            BigDecimal cadHours = order.getCadHours() != null ? order.getCadHours() : BigDecimal.ZERO;
+            BigDecimal cadHourlyRate = order.getCadHourlyRateChf() != null ? order.getCadHourlyRateChf() : BigDecimal.ZERO;
+            Map<String, Object> cadLine = new HashMap<>();
+            cadLine.put("description", "Servizio CAD (" + formatCadHours(cadHours) + "h)");
+            cadLine.put("quantity", 1);
+            cadLine.put("unitPriceFormatted", String.format("CHF %.2f", cadHourlyRate));
+            cadLine.put("lineTotalFormatted", String.format("CHF %.2f", order.getCadTotalChf()));
+            invoiceLineItems.add(cadLine);
+        }
+
         Map<String, Object> setupLine = new HashMap<>();
         setupLine.put("description", "Costo Setup");
         setupLine.put("quantity", 1);
@@ -140,4 +153,8 @@ public class InvoicePdfRenderingService {
         
         return generateInvoicePdfBytesFromTemplate(vars, qrBillSvg);
     }
+
+    private String formatCadHours(BigDecimal hours) {
+        return hours.setScale(2, RoundingMode.HALF_UP).stripTrailingZeros().toPlainString();
+    }
 }

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

@@ -7,7 +7,6 @@ import com.printcalculator.repository.OrderItemRepository;
 import com.printcalculator.repository.OrderRepository;
 import com.printcalculator.repository.QuoteLineItemRepository;
 import com.printcalculator.repository.QuoteSessionRepository;
-import com.printcalculator.repository.PricingPolicyRepository;
 import com.printcalculator.event.OrderCreatedEvent;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.stereotype.Service;
@@ -35,8 +34,7 @@ public class OrderService {
     private final QrBillService qrBillService;
     private final ApplicationEventPublisher eventPublisher;
     private final PaymentService paymentService;
-    private final QuoteCalculator quoteCalculator;
+    private final QuoteSessionTotalsService quoteSessionTotalsService;
-    private final PricingPolicyRepository pricingRepo;
 
     public OrderService(OrderRepository orderRepo,
                         OrderItemRepository orderItemRepo,
@@ -48,8 +46,7 @@ public class OrderService {
                         QrBillService qrBillService,
                         ApplicationEventPublisher eventPublisher,
                         PaymentService paymentService,
-                        QuoteCalculator quoteCalculator,
+                        QuoteSessionTotalsService quoteSessionTotalsService) {
-                        PricingPolicyRepository pricingRepo) {
         this.orderRepo = orderRepo;
         this.orderItemRepo = orderItemRepo;
         this.quoteSessionRepo = quoteSessionRepo;
@@ -60,8 +57,7 @@ public class OrderService {
         this.qrBillService = qrBillService;
         this.eventPublisher = eventPublisher;
         this.paymentService = paymentService;
-        this.quoteCalculator = quoteCalculator;
+        this.quoteSessionTotalsService = quoteSessionTotalsService;
-        this.pricingRepo = pricingRepo;
     }
 
     @Transactional
@@ -148,60 +144,31 @@ public class OrderService {
         }
 
         List<QuoteLineItem> quoteItems = quoteLineItemRepo.findByQuoteSessionId(quoteSessionId);
+        QuoteSessionTotalsService.QuoteSessionTotals totals = quoteSessionTotalsService.compute(session, quoteItems);
+        BigDecimal cadTotal = totals.cadTotalChf();
 
         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(totals.shippingCostChf());
-        // Calculate shipping cost based on dimensions before initial save
+        order.setIsCadOrder(cadTotal.compareTo(BigDecimal.ZERO) > 0 || "CAD_ACTIVE".equals(session.getStatus()));
-        boolean exceedsBaseSize = false;
+        order.setSourceRequestId(session.getSourceRequestId());
-        for (QuoteLineItem item : quoteItems) {
+        order.setCadHours(session.getCadHours() != null ? session.getCadHours() : BigDecimal.ZERO);
-            BigDecimal x = item.getBoundingBoxXMm() != null ? item.getBoundingBoxXMm() : BigDecimal.ZERO;
+        order.setCadHourlyRateChf(session.getCadHourlyRateChf() != null ? session.getCadHourlyRateChf() : BigDecimal.ZERO);
-            BigDecimal y = item.getBoundingBoxYMm() != null ? item.getBoundingBoxYMm() : BigDecimal.ZERO;
+        order.setCadTotalChf(cadTotal);
-            BigDecimal z = item.getBoundingBoxZMm() != null ? item.getBoundingBoxZMm() : BigDecimal.ZERO;
-            
-            BigDecimal[] dims = {x, y, z};
-            java.util.Arrays.sort(dims);
-            
-            if (dims[2].compareTo(BigDecimal.valueOf(250.0)) > 0 ||
-                dims[1].compareTo(BigDecimal.valueOf(176.0)) > 0 ||
-                dims[0].compareTo(BigDecimal.valueOf(20.0)) > 0) {
-                exceedsBaseSize = true;
-                break;
-            }
-        }
-        int totalQuantity = quoteItems.stream()
-                .mapToInt(i -> i.getQuantity() != null ? i.getQuantity() : 1)
-                .sum();
-
-        if (exceedsBaseSize) {
-            order.setShippingCostChf(totalQuantity > 5 ? BigDecimal.valueOf(9.00) : BigDecimal.valueOf(4.00));
-        } else {
-            order.setShippingCostChf(BigDecimal.valueOf(2.00));
-        }
 
         order = orderRepo.save(order);
 
         List<OrderItem> savedItems = new ArrayList<>();
 
-        // Calculate global machine cost upfront
-        BigDecimal totalSeconds = BigDecimal.ZERO;
-        for (QuoteLineItem qItem : quoteItems) {
-            if (qItem.getPrintTimeSeconds() != null) {
-                totalSeconds = totalSeconds.add(BigDecimal.valueOf(qItem.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(qItem.getQuantity())));
-            }
-        }
-        BigDecimal totalHours = totalSeconds.divide(BigDecimal.valueOf(3600), 4, RoundingMode.HALF_UP);
-        PricingPolicy policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
-        BigDecimal globalMachineCost = quoteCalculator.calculateSessionMachineCost(policy, totalHours);
-
         for (QuoteLineItem qItem : quoteItems) {
             OrderItem oItem = new OrderItem();
             oItem.setOrder(order);
             oItem.setOriginalFilename(qItem.getOriginalFilename());
-            oItem.setQuantity(qItem.getQuantity());
+            int quantity = qItem.getQuantity() != null && qItem.getQuantity() > 0 ? qItem.getQuantity() : 1;
+            oItem.setQuantity(quantity);
             oItem.setColorCode(qItem.getColorCode());
             oItem.setFilamentVariant(qItem.getFilamentVariant());
             if (qItem.getFilamentVariant() != null
@@ -212,17 +179,17 @@ public class OrderService {
                 oItem.setMaterialCode(session.getMaterialCode());
             }
 
-            BigDecimal distributedUnitPrice = qItem.getUnitPriceChf();
+            BigDecimal distributedUnitPrice = qItem.getUnitPriceChf() != null ? qItem.getUnitPriceChf() : BigDecimal.ZERO;
-            if (totalSeconds.compareTo(BigDecimal.ZERO) > 0 && qItem.getPrintTimeSeconds() != null) {
+            if (totals.totalPrintSeconds().compareTo(BigDecimal.ZERO) > 0 && qItem.getPrintTimeSeconds() != null) {
-                BigDecimal itemSeconds = BigDecimal.valueOf(qItem.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(qItem.getQuantity()));
+                BigDecimal itemSeconds = BigDecimal.valueOf(qItem.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(quantity));
-                BigDecimal share = itemSeconds.divide(totalSeconds, 8, RoundingMode.HALF_UP);
+                BigDecimal share = itemSeconds.divide(totals.totalPrintSeconds(), 8, RoundingMode.HALF_UP);
-                BigDecimal itemMachineCost = globalMachineCost.multiply(share);
+                BigDecimal itemMachineCost = totals.globalMachineCostChf().multiply(share);
-                BigDecimal unitMachineCost = itemMachineCost.divide(BigDecimal.valueOf(qItem.getQuantity()), 2, RoundingMode.HALF_UP);
+                BigDecimal unitMachineCost = itemMachineCost.divide(BigDecimal.valueOf(quantity), 2, RoundingMode.HALF_UP);
                 distributedUnitPrice = distributedUnitPrice.add(unitMachineCost);
             }
 
             oItem.setUnitPriceChf(distributedUnitPrice);
-            oItem.setLineTotalChf(distributedUnitPrice.multiply(BigDecimal.valueOf(qItem.getQuantity())));
+            oItem.setLineTotalChf(distributedUnitPrice.multiply(BigDecimal.valueOf(quantity)));
             oItem.setPrintTimeSeconds(qItem.getPrintTimeSeconds());
             oItem.setMaterialGrams(qItem.getMaterialGrams());
             oItem.setBoundingBoxXMm(qItem.getBoundingBoxXMm());
@@ -260,9 +227,12 @@ public class OrderService {
             subtotal = subtotal.add(oItem.getLineTotalChf());
         }
 
-        order.setSubtotalChf(subtotal);
+        order.setSubtotalChf(subtotal.add(cadTotal));
         
-        BigDecimal total = subtotal.add(order.getSetupCostChf()).add(order.getShippingCostChf()).subtract(order.getDiscountChf() != null ? order.getDiscountChf() : BigDecimal.ZERO);
+        BigDecimal total = order.getSubtotalChf()
+                .add(order.getSetupCostChf())
+                .add(order.getShippingCostChf())
+                .subtract(order.getDiscountChf() != null ? order.getDiscountChf() : BigDecimal.ZERO);
         order.setTotalChf(total);
 
         session.setConvertedOrderId(order.getId());

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

@@ -0,0 +1,124 @@
+package com.printcalculator.service;
+
+import com.printcalculator.entity.PricingPolicy;
+import com.printcalculator.entity.QuoteLineItem;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.repository.PricingPolicyRepository;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.Arrays;
+import java.util.List;
+
+@Service
+public class QuoteSessionTotalsService {
+    private final PricingPolicyRepository pricingRepo;
+    private final QuoteCalculator quoteCalculator;
+
+    public QuoteSessionTotalsService(PricingPolicyRepository pricingRepo, QuoteCalculator quoteCalculator) {
+        this.pricingRepo = pricingRepo;
+        this.quoteCalculator = quoteCalculator;
+    }
+
+    public QuoteSessionTotals compute(QuoteSession session, List<QuoteLineItem> items) {
+        BigDecimal printItemsBaseTotal = BigDecimal.ZERO;
+        BigDecimal totalSeconds = BigDecimal.ZERO;
+
+        for (QuoteLineItem item : items) {
+            int quantity = normalizeQuantity(item.getQuantity());
+            BigDecimal unitPrice = item.getUnitPriceChf() != null ? item.getUnitPriceChf() : BigDecimal.ZERO;
+            printItemsBaseTotal = printItemsBaseTotal.add(unitPrice.multiply(BigDecimal.valueOf(quantity)));
+
+            if (item.getPrintTimeSeconds() != null && item.getPrintTimeSeconds() > 0) {
+                totalSeconds = totalSeconds.add(BigDecimal.valueOf(item.getPrintTimeSeconds()).multiply(BigDecimal.valueOf(quantity)));
+            }
+        }
+
+        BigDecimal totalHours = totalSeconds.divide(BigDecimal.valueOf(3600), 4, RoundingMode.HALF_UP);
+        PricingPolicy policy = pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc();
+        BigDecimal globalMachineCost = quoteCalculator.calculateSessionMachineCost(policy, totalHours);
+        BigDecimal printItemsTotal = printItemsBaseTotal.add(globalMachineCost);
+
+        BigDecimal cadTotal = calculateCadTotal(session);
+        BigDecimal itemsTotal = printItemsTotal.add(cadTotal);
+
+        BigDecimal setupFee = session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO;
+        BigDecimal shippingCost = calculateShippingCost(items);
+        BigDecimal grandTotal = itemsTotal.add(setupFee).add(shippingCost);
+
+        return new QuoteSessionTotals(
+                printItemsTotal,
+                globalMachineCost,
+                cadTotal,
+                itemsTotal,
+                setupFee,
+                shippingCost,
+                grandTotal,
+                totalSeconds
+        );
+    }
+
+    public BigDecimal calculateCadTotal(QuoteSession session) {
+        if (session == null) {
+            return BigDecimal.ZERO;
+        }
+        BigDecimal cadHours = session.getCadHours() != null ? session.getCadHours() : BigDecimal.ZERO;
+        BigDecimal cadRate = session.getCadHourlyRateChf() != null ? session.getCadHourlyRateChf() : BigDecimal.ZERO;
+        if (cadHours.compareTo(BigDecimal.ZERO) <= 0 || cadRate.compareTo(BigDecimal.ZERO) <= 0) {
+            return BigDecimal.ZERO;
+        }
+        return cadHours.multiply(cadRate).setScale(2, RoundingMode.HALF_UP);
+    }
+
+    public BigDecimal calculateShippingCost(List<QuoteLineItem> items) {
+        if (items == null || items.isEmpty()) {
+            return BigDecimal.ZERO;
+        }
+
+        boolean exceedsBaseSize = false;
+        for (QuoteLineItem item : items) {
+            BigDecimal x = item.getBoundingBoxXMm() != null ? item.getBoundingBoxXMm() : BigDecimal.ZERO;
+            BigDecimal y = item.getBoundingBoxYMm() != null ? item.getBoundingBoxYMm() : BigDecimal.ZERO;
+            BigDecimal z = item.getBoundingBoxZMm() != null ? item.getBoundingBoxZMm() : BigDecimal.ZERO;
+
+            BigDecimal[] dims = {x, y, z};
+            Arrays.sort(dims);
+
+            if (dims[2].compareTo(BigDecimal.valueOf(250.0)) > 0
+                    || dims[1].compareTo(BigDecimal.valueOf(176.0)) > 0
+                    || dims[0].compareTo(BigDecimal.valueOf(20.0)) > 0) {
+                exceedsBaseSize = true;
+                break;
+            }
+        }
+
+        int totalQuantity = items.stream().mapToInt(i -> normalizeQuantity(i.getQuantity())).sum();
+        if (totalQuantity <= 0) {
+            return BigDecimal.ZERO;
+        }
+
+        if (exceedsBaseSize) {
+            return totalQuantity > 5 ? BigDecimal.valueOf(9.00) : BigDecimal.valueOf(4.00);
+        }
+        return BigDecimal.valueOf(2.00);
+    }
+
+    private int normalizeQuantity(Integer quantity) {
+        if (quantity == null || quantity < 1) {
+            return 1;
+        }
+        return quantity;
+    }
+
+    public record QuoteSessionTotals(
+            BigDecimal printItemsTotalChf,
+            BigDecimal globalMachineCostChf,
+            BigDecimal cadTotalChf,
+            BigDecimal itemsTotalChf,
+            BigDecimal setupCostChf,
+            BigDecimal shippingCostChf,
+            BigDecimal grandTotalChf,
+            BigDecimal totalPrintSeconds
+    ) {}
+}

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

@@ -45,9 +45,8 @@ public class SessionCleanupService {
             // "rimangono in memoria... cancella quelle vecchie di 7 giorni".
             // Implementation plan said: status != 'ORDERED'.
             
-            // User specified statuses: ACTIVE, EXPIRED, CONVERTED.
+            // CAD_ACTIVE sessions are managed manually from back-office and must be preserved.
-            // We should NOT delete sessions that have been converted to an order.
+            if ("CONVERTED".equals(session.getStatus()) || "CAD_ACTIVE".equals(session.getStatus())) {
-            if ("CONVERTED".equals(session.getStatus())) {
                 continue;
             }
 

backend/src/test/java/com/printcalculator/service/QuoteSessionTotalsServiceTest.java

@@ -0,0 +1,84 @@
+package com.printcalculator.service;
+
+import com.printcalculator.entity.PricingPolicy;
+import com.printcalculator.entity.QuoteLineItem;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.repository.PricingPolicyRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class QuoteSessionTotalsServiceTest {
+    private PricingPolicyRepository pricingRepo;
+    private QuoteCalculator quoteCalculator;
+    private QuoteSessionTotalsService service;
+
+    @BeforeEach
+    void setUp() {
+        pricingRepo = mock(PricingPolicyRepository.class);
+        quoteCalculator = mock(QuoteCalculator.class);
+        service = new QuoteSessionTotalsService(pricingRepo, quoteCalculator);
+    }
+
+    @Test
+    void compute_WithCadOnlySession_ShouldIncludeCadAndNoShipping() {
+        QuoteSession session = new QuoteSession();
+        session.setSetupCostChf(BigDecimal.ZERO);
+        session.setCadHours(BigDecimal.valueOf(2));
+        session.setCadHourlyRateChf(BigDecimal.valueOf(75));
+
+        PricingPolicy policy = new PricingPolicy();
+        when(pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc()).thenReturn(policy);
+        when(quoteCalculator.calculateSessionMachineCost(eq(policy), any(BigDecimal.class))).thenReturn(BigDecimal.ZERO);
+
+        QuoteSessionTotalsService.QuoteSessionTotals totals = service.compute(session, List.of());
+
+        assertAmountEquals("150.00", totals.cadTotalChf());
+        assertAmountEquals("0.00", totals.shippingCostChf());
+        assertAmountEquals("150.00", totals.itemsTotalChf());
+        assertAmountEquals("150.00", totals.grandTotalChf());
+    }
+
+    @Test
+    void compute_WithPrintItemAndCad_ShouldSumEverything() {
+        QuoteSession session = new QuoteSession();
+        session.setSetupCostChf(new BigDecimal("5.00"));
+        session.setCadHours(new BigDecimal("1.50"));
+        session.setCadHourlyRateChf(new BigDecimal("60.00"));
+
+        QuoteLineItem item = new QuoteLineItem();
+        item.setQuantity(2);
+        item.setUnitPriceChf(new BigDecimal("10.00"));
+        item.setPrintTimeSeconds(3600);
+        item.setBoundingBoxXMm(new BigDecimal("10"));
+        item.setBoundingBoxYMm(new BigDecimal("10"));
+        item.setBoundingBoxZMm(new BigDecimal("10"));
+
+        PricingPolicy policy = new PricingPolicy();
+        when(pricingRepo.findFirstByIsActiveTrueOrderByValidFromDesc()).thenReturn(policy);
+        when(quoteCalculator.calculateSessionMachineCost(policy, new BigDecimal("2.0000")))
+                .thenReturn(new BigDecimal("3.00"));
+
+        QuoteSessionTotalsService.QuoteSessionTotals totals = service.compute(session, List.of(item));
+
+        assertAmountEquals("23.00", totals.printItemsTotalChf());
+        assertAmountEquals("90.00", totals.cadTotalChf());
+        assertAmountEquals("113.00", totals.itemsTotalChf());
+        assertAmountEquals("2.00", totals.shippingCostChf());
+        assertAmountEquals("120.00", totals.grandTotalChf());
+    }
+
+    private void assertAmountEquals(String expected, BigDecimal actual) {
+        assertTrue(new BigDecimal(expected).compareTo(actual) == 0,
+                "Expected " + expected + " but got " + actual);
+    }
+}

db.sql

@@ -599,7 +599,7 @@ CREATE UNIQUE INDEX IF NOT EXISTS ux_customers_email
 CREATE TABLE IF NOT EXISTS quote_sessions
 (
     quote_session_id   uuid PRIMARY KEY        DEFAULT gen_random_uuid(),
-    status             text           NOT NULL CHECK (status IN ('ACTIVE', 'EXPIRED', 'CONVERTED')),
+    status             text           NOT NULL CHECK (status IN ('ACTIVE', 'CAD_ACTIVE', 'EXPIRED', 'CONVERTED')),
     pricing_version    text           NOT NULL,
 
     -- Parametri "globali" (dalla tua UI avanzata)
@@ -612,6 +612,9 @@ CREATE TABLE IF NOT EXISTS quote_sessions
     notes              text,
 
     setup_cost_chf     numeric(12, 2) NOT NULL DEFAULT 0.00,
+    source_request_id  uuid,
+    cad_hours          numeric(10, 2),
+    cad_hourly_rate_chf numeric(10, 2),
 
     created_at         timestamptz    NOT NULL DEFAULT now(),
     expires_at         timestamptz    NOT NULL,
@@ -624,6 +627,25 @@ CREATE INDEX IF NOT EXISTS ix_quote_sessions_status
 CREATE INDEX IF NOT EXISTS ix_quote_sessions_expires_at
     ON quote_sessions (expires_at);
 
+CREATE INDEX IF NOT EXISTS ix_quote_sessions_source_request
+    ON quote_sessions (source_request_id);
+
+ALTER TABLE quote_sessions
+    ADD COLUMN IF NOT EXISTS source_request_id uuid;
+
+ALTER TABLE quote_sessions
+    ADD COLUMN IF NOT EXISTS cad_hours numeric(10, 2);
+
+ALTER TABLE quote_sessions
+    ADD COLUMN IF NOT EXISTS cad_hourly_rate_chf numeric(10, 2);
+
+ALTER TABLE quote_sessions
+    DROP CONSTRAINT IF EXISTS quote_sessions_status_check;
+
+ALTER TABLE quote_sessions
+    ADD CONSTRAINT quote_sessions_status_check
+        CHECK (status IN ('ACTIVE', 'CAD_ACTIVE', 'EXPIRED', 'CONVERTED'));
+
 -- =========================
 -- QUOTE LINE ITEMS (1 file = 1 riga)
 -- =========================
@@ -676,6 +698,7 @@ CREATE TABLE IF NOT EXISTS orders
 (
     order_id                 uuid PRIMARY KEY        DEFAULT gen_random_uuid(),
     source_quote_session_id  uuid REFERENCES quote_sessions (quote_session_id),
+    source_request_id        uuid,
 
     status                   text           NOT NULL CHECK (status IN (
                                                                        'PENDING_PAYMENT', 'PAID', 'IN_PRODUCTION',
@@ -717,6 +740,10 @@ CREATE TABLE IF NOT EXISTS orders
     discount_chf             numeric(12, 2) NOT NULL DEFAULT 0.00,
 
     subtotal_chf             numeric(12, 2) NOT NULL DEFAULT 0.00,
+    is_cad_order             boolean        NOT NULL DEFAULT false,
+    cad_hours                numeric(10, 2),
+    cad_hourly_rate_chf      numeric(10, 2),
+    cad_total_chf            numeric(12, 2) NOT NULL DEFAULT 0.00,
     total_chf                numeric(12, 2) NOT NULL DEFAULT 0.00,
 
     created_at               timestamptz    NOT NULL DEFAULT now(),
@@ -730,6 +757,24 @@ CREATE INDEX IF NOT EXISTS ix_orders_status
 CREATE INDEX IF NOT EXISTS ix_orders_customer_email
     ON orders (lower(customer_email));
 
+CREATE INDEX IF NOT EXISTS ix_orders_source_request
+    ON orders (source_request_id);
+
+ALTER TABLE orders
+    ADD COLUMN IF NOT EXISTS source_request_id uuid;
+
+ALTER TABLE orders
+    ADD COLUMN IF NOT EXISTS is_cad_order boolean NOT NULL DEFAULT false;
+
+ALTER TABLE orders
+    ADD COLUMN IF NOT EXISTS cad_hours numeric(10, 2);
+
+ALTER TABLE orders
+    ADD COLUMN IF NOT EXISTS cad_hourly_rate_chf numeric(10, 2);
+
+ALTER TABLE orders
+    ADD COLUMN IF NOT EXISTS cad_total_chf numeric(12, 2) NOT NULL DEFAULT 0.00;
+
 -- =========================
 -- ORDER ITEMS (1 file 3D = 1 riga, file salvato su disco)
 -- =========================
@@ -849,3 +894,17 @@ CREATE TABLE IF NOT EXISTS custom_quote_request_attachments
 
 CREATE INDEX IF NOT EXISTS ix_custom_quote_attachments_request
     ON custom_quote_request_attachments (request_id);
+
+ALTER TABLE quote_sessions
+    DROP CONSTRAINT IF EXISTS fk_quote_sessions_source_request;
+
+ALTER TABLE quote_sessions
+    ADD CONSTRAINT fk_quote_sessions_source_request
+        FOREIGN KEY (source_request_id) REFERENCES custom_quote_requests (request_id);
+
+ALTER TABLE orders
+    DROP CONSTRAINT IF EXISTS fk_orders_source_request;
+
+ALTER TABLE orders
+    ADD CONSTRAINT fk_orders_source_request
+        FOREIGN KEY (source_request_id) REFERENCES custom_quote_requests (request_id);

frontend/src/app/app.routes.ts

@@ -28,6 +28,13 @@ const appChildRoutes: Routes = [
     loadChildren: () =>
       import('./features/contact/contact.routes').then((m) => m.CONTACT_ROUTES),
   },
+  {
+    path: 'checkout/cad',
+    loadComponent: () =>
+      import('./features/checkout/checkout.component').then(
+        (m) => m.CheckoutComponent,
+      ),
+  },
   {
     path: 'checkout',
     loadComponent: () =>

frontend/src/app/core/layout/navbar.component.html

@@ -53,7 +53,7 @@
         }
       </select>
 
-      <div class="icon-placeholder">
+      <div class="icon-placeholder" routerLink="/admin">
         <svg
           xmlns="http://www.w3.org/2000/svg"
           width="20"

frontend/src/app/core/layout/navbar.component.ts

@@ -2,6 +2,7 @@ import { Component } from '@angular/core';
 import { RouterLink, RouterLinkActive } from '@angular/router';
 import { TranslateModule } from '@ngx-translate/core';
 import { LanguageService } from '../services/language.service';
+import {routes} from '../../app.routes';
 
 @Component({
   selector: 'app-navbar',
@@ -37,4 +38,6 @@ export class NavbarComponent {
   closeMenu() {
     this.isMenuOpen = false;
   }
+
+  protected readonly routes = routes;
 }

frontend/src/app/features/admin/admin.routes.ts

@@ -50,6 +50,13 @@ export const ADMIN_ROUTES: Routes = [
             (m) => m.AdminSessionsComponent,
           ),
       },
+      {
+        path: 'cad-invoices',
+        loadComponent: () =>
+          import('./pages/admin-cad-invoices.component').then(
+            (m) => m.AdminCadInvoicesComponent,
+          ),
+      },
     ],
   },
 ];

frontend/src/app/features/admin/pages/admin-cad-invoices.component.html

@@ -0,0 +1,128 @@
+<section class="cad-page">
+  <header class="page-header">
+    <div>
+      <h1>Fatture CAD</h1>
+      <p>
+        Crea un checkout CAD partendo da una sessione esistente (opzionale) e
+        gestisci lo stato fino all'ordine.
+      </p>
+    </div>
+    <button type="button" (click)="loadCadInvoices()" [disabled]="loading">
+      Aggiorna
+    </button>
+  </header>
+
+  <p class="error" *ngIf="errorMessage">{{ errorMessage }}</p>
+  <p class="success" *ngIf="successMessage">{{ successMessage }}</p>
+
+  <section class="create-box">
+    <h2>Crea nuova fattura CAD</h2>
+    <div class="form-grid">
+      <label>
+        <span>ID Sessione (opzionale)</span>
+        <input
+          [(ngModel)]="form.sessionId"
+          placeholder="UUID sessione quote"
+          type="text"
+        />
+      </label>
+      <label>
+        <span>ID Richiesta Contatto (opzionale)</span>
+        <input
+          [(ngModel)]="form.sourceRequestId"
+          placeholder="UUID richiesta contatto"
+          type="text"
+        />
+      </label>
+      <label>
+        <span>Ore CAD</span>
+        <input [(ngModel)]="form.cadHours" min="0.1" step="0.1" type="number" />
+      </label>
+      <label>
+        <span>Tariffa CAD CHF/h (opzionale)</span>
+        <input
+          [(ngModel)]="form.cadHourlyRateChf"
+          placeholder="Se vuoto usa pricing policy attiva"
+          min="0"
+          step="0.05"
+          type="number"
+        />
+      </label>
+      <label class="notes-field">
+        <span>Nota (opzionale)</span>
+        <textarea
+          [(ngModel)]="form.notes"
+          placeholder="Nota visibile nel checkout CAD (es. dettagli lavorazione)"
+          rows="3"
+        ></textarea>
+      </label>
+    </div>
+    <div class="create-actions">
+      <button type="button" (click)="createCadInvoice()" [disabled]="creating">
+        {{ creating ? "Creazione..." : "Crea link checkout CAD" }}
+      </button>
+    </div>
+  </section>
+
+  <section class="table-wrap" *ngIf="!loading; else loadingTpl">
+    <table>
+      <thead>
+        <tr>
+          <th>Sessione</th>
+          <th>Richiesta</th>
+          <th>Ore CAD</th>
+          <th>Tariffa</th>
+          <th>Totale CAD</th>
+          <th>Totale ordine</th>
+          <th>Stato sessione</th>
+          <th>Nota</th>
+          <th>Ordine</th>
+          <th>Azioni</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr *ngFor="let row of invoices">
+          <td [title]="row.sessionId">{{ row.sessionId | slice: 0 : 8 }}</td>
+          <td>{{ row.sourceRequestId || "-" }}</td>
+          <td>{{ row.cadHours }}</td>
+          <td>{{ row.cadHourlyRateChf | currency: "CHF" }}</td>
+          <td>{{ row.cadTotalChf | currency: "CHF" }}</td>
+          <td>{{ row.grandTotalChf | currency: "CHF" }}</td>
+          <td>{{ row.sessionStatus }}</td>
+          <td class="notes-cell" [title]="row.notes || ''">{{ row.notes || "-" }}</td>
+          <td>
+            <span *ngIf="row.convertedOrderId; else noOrder">
+              {{ row.convertedOrderId | slice: 0 : 8 }} ({{
+                row.convertedOrderStatus || "-"
+              }})
+            </span>
+            <ng-template #noOrder>-</ng-template>
+          </td>
+          <td class="actions">
+            <button type="button" class="ghost" (click)="openCheckout(row.checkoutPath)">
+              Apri checkout
+            </button>
+            <button type="button" class="ghost" (click)="copyCheckout(row.checkoutPath)">
+              Copia link
+            </button>
+            <button
+              type="button"
+              class="ghost"
+              *ngIf="row.convertedOrderId"
+              (click)="downloadInvoice(row.convertedOrderId)"
+            >
+              Scarica fattura
+            </button>
+          </td>
+        </tr>
+        <tr *ngIf="invoices.length === 0">
+          <td colspan="10">Nessuna fattura CAD trovata.</td>
+        </tr>
+      </tbody>
+    </table>
+  </section>
+</section>
+
+<ng-template #loadingTpl>
+  <p>Caricamento fatture CAD...</p>
+</ng-template>

frontend/src/app/features/admin/pages/admin-cad-invoices.component.scss

@@ -0,0 +1,140 @@
+.cad-page {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-5);
+}
+
+.page-header {
+  display: flex;
+  justify-content: space-between;
+  gap: var(--space-4);
+  align-items: flex-start;
+}
+
+.page-header h1 {
+  margin: 0;
+}
+
+.page-header p {
+  margin: var(--space-2) 0 0;
+  color: var(--color-text-muted);
+}
+
+button {
+  border: 0;
+  border-radius: var(--radius-md);
+  padding: var(--space-2) var(--space-4);
+  background: var(--color-brand);
+  color: var(--color-neutral-900);
+  font-weight: 600;
+  cursor: pointer;
+}
+
+button:disabled {
+  opacity: 0.65;
+  cursor: not-allowed;
+}
+
+.create-box {
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  background: var(--color-bg-card);
+  padding: var(--space-4);
+}
+
+.create-box h2 {
+  margin-top: 0;
+}
+
+.form-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: var(--space-3);
+}
+
+.form-grid label {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-1);
+}
+
+.form-grid span {
+  font-size: 0.9rem;
+  color: var(--color-text-muted);
+}
+
+.form-grid input {
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  padding: var(--space-2);
+}
+
+.notes-field {
+  grid-column: 1 / -1;
+}
+
+.form-grid textarea {
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  padding: var(--space-2);
+  resize: vertical;
+}
+
+.create-actions {
+  margin-top: var(--space-3);
+}
+
+.table-wrap {
+  overflow: auto;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+  min-width: 1100px;
+}
+
+th,
+td {
+  border-bottom: 1px solid var(--color-border);
+  padding: var(--space-2);
+  text-align: left;
+}
+
+.notes-cell {
+  max-width: 280px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.actions {
+  display: flex;
+  gap: var(--space-2);
+  flex-wrap: wrap;
+}
+
+.ghost {
+  background: transparent;
+  border: 1px solid var(--color-border);
+  color: var(--color-text);
+}
+
+.error {
+  color: var(--color-danger-500);
+}
+
+.success {
+  color: var(--color-success-500);
+}
+
+@media (max-width: 880px) {
+  .page-header {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .form-grid {
+    grid-template-columns: 1fr;
+  }
+}

frontend/src/app/features/admin/pages/admin-cad-invoices.component.ts

@@ -0,0 +1,157 @@
+import { CommonModule } from '@angular/common';
+import { Component, OnInit, inject } from '@angular/core';
+import { FormsModule } from '@angular/forms';
+import {
+  AdminCadInvoice,
+  AdminOperationsService,
+} from '../services/admin-operations.service';
+import { AdminOrdersService } from '../services/admin-orders.service';
+
+@Component({
+  selector: 'app-admin-cad-invoices',
+  standalone: true,
+  imports: [CommonModule, FormsModule],
+  templateUrl: './admin-cad-invoices.component.html',
+  styleUrl: './admin-cad-invoices.component.scss',
+})
+export class AdminCadInvoicesComponent implements OnInit {
+  private readonly adminOperationsService = inject(AdminOperationsService);
+  private readonly adminOrdersService = inject(AdminOrdersService);
+
+  invoices: AdminCadInvoice[] = [];
+  loading = false;
+  creating = false;
+  errorMessage: string | null = null;
+  successMessage: string | null = null;
+
+  form = {
+    sessionId: '',
+    sourceRequestId: '',
+    cadHours: 1,
+    cadHourlyRateChf: '',
+    notes: '',
+  };
+
+  ngOnInit(): void {
+    this.loadCadInvoices();
+  }
+
+  loadCadInvoices(): void {
+    this.loading = true;
+    this.errorMessage = null;
+    this.adminOperationsService.listCadInvoices().subscribe({
+      next: (rows) => {
+        this.invoices = rows;
+        this.loading = false;
+      },
+      error: () => {
+        this.loading = false;
+        this.errorMessage = 'Impossibile caricare le fatture CAD.';
+      },
+    });
+  }
+
+  createCadInvoice(): void {
+    if (this.creating) {
+      return;
+    }
+
+    const cadHours = Number(this.form.cadHours);
+    if (!Number.isFinite(cadHours) || cadHours <= 0) {
+      this.errorMessage = 'Inserisci ore CAD valide (> 0).';
+      return;
+    }
+
+    this.creating = true;
+    this.errorMessage = null;
+    this.successMessage = null;
+
+    let payload: {
+      sessionId?: string;
+      sourceRequestId?: string;
+      cadHours: number;
+      cadHourlyRateChf?: number;
+      notes?: string;
+    };
+
+    try {
+      const sessionIdRaw = String(this.form.sessionId ?? '').trim();
+      const sourceRequestIdRaw = String(this.form.sourceRequestId ?? '').trim();
+      const cadRateRaw = String(this.form.cadHourlyRateChf ?? '').trim();
+      const notesRaw = String(this.form.notes ?? '').trim();
+
+      payload = {
+        sessionId: sessionIdRaw || undefined,
+        sourceRequestId: sourceRequestIdRaw || undefined,
+        cadHours,
+        cadHourlyRateChf:
+          cadRateRaw.length > 0 && Number.isFinite(Number(cadRateRaw))
+            ? Number(cadRateRaw)
+            : undefined,
+        notes: notesRaw.length > 0 ? notesRaw : undefined,
+      };
+    } catch {
+      this.creating = false;
+      this.errorMessage = 'Valori form non validi.';
+      return;
+    }
+
+    this.adminOperationsService.createCadInvoice(payload).subscribe({
+      next: (created) => {
+        this.creating = false;
+        this.successMessage = `Fattura CAD pronta. Sessione: ${created.sessionId}`;
+        this.loadCadInvoices();
+      },
+      error: (err) => {
+        this.creating = false;
+        this.errorMessage =
+          err?.error?.message || 'Creazione fattura CAD non riuscita.';
+      },
+    });
+  }
+
+  openCheckout(path: string): void {
+    const url = this.toCheckoutUrl(path);
+    window.open(url, '_blank');
+  }
+
+  copyCheckout(path: string): void {
+    const url = this.toCheckoutUrl(path);
+    navigator.clipboard?.writeText(url);
+    this.successMessage = 'Link checkout CAD copiato negli appunti.';
+  }
+
+  downloadInvoice(orderId?: string): void {
+    if (!orderId) return;
+    this.adminOrdersService.downloadOrderInvoice(orderId).subscribe({
+      next: (blob) => {
+        const url = window.URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = `fattura-cad-${orderId}.pdf`;
+        a.click();
+        window.URL.revokeObjectURL(url);
+      },
+      error: () => {
+        this.errorMessage = 'Download fattura non riuscito.';
+      },
+    });
+  }
+
+  private toCheckoutUrl(path: string): string {
+    const safePath = path.startsWith('/') ? path : `/${path}`;
+    const lang = this.resolveLang();
+    return `${window.location.origin}/${lang}${safePath}`;
+  }
+
+  private resolveLang(): string {
+    const firstSegment = window.location.pathname
+      .split('/')
+      .filter(Boolean)
+      .shift();
+    if (firstSegment && ['it', 'en', 'de', 'fr'].includes(firstSegment)) {
+      return firstSegment;
+    }
+    return 'it';
+  }
+}

frontend/src/app/features/admin/pages/admin-contact-requests.component.scss

@@ -199,18 +199,20 @@ tbody tr.selected {
 .request-id {
   margin: var(--space-2) 0 0;
   display: flex;
-  align-items: center;
+  align-items: flex-start;
+  flex-wrap: wrap;
   gap: 8px;
   font-size: 0.8rem;
   color: var(--color-text-muted);
 }
 
 .request-id code {
-  display: inline-block;
+  display: block;
-  max-width: 260px;
+  max-width: 100%;
-  overflow: hidden;
+  overflow: visible;
-  text-overflow: ellipsis;
+  text-overflow: clip;
-  white-space: nowrap;
+  white-space: normal;
+  overflow-wrap: anywhere;
   color: var(--color-text);
   background: var(--color-neutral-100);
   border: 1px solid var(--color-border);

frontend/src/app/features/admin/pages/admin-sessions.component.html

@@ -47,6 +47,13 @@
               >
                 {{ isDetailOpen(session.id) ? "Nascondi" : "Vedi" }}
               </button>
+              <button
+                type="button"
+                class="btn-secondary"
+                (click)="copySessionUuid(session.id)"
+              >
+                Copia UUID
+              </button>
               <button
                 type="button"
                 class="btn-danger"
@@ -78,6 +85,11 @@
                 "
                 class="detail-box"
               >
+                <div class="detail-session-id">
+                  <strong>UUID sessione:</strong>
+                  <code>{{ detail.session.id }}</code>
+                </div>
+
                 <div class="detail-summary">
                   <div>
                     <strong>Elementi:</strong> {{ detail.items.length }}

frontend/src/app/features/admin/pages/admin-sessions.component.scss

@@ -103,6 +103,22 @@ td {
   padding: var(--space-4);
 }
 
+.detail-session-id {
+  margin-bottom: var(--space-3);
+  display: grid;
+  gap: 4px;
+}
+
+.detail-session-id code {
+  display: block;
+  max-width: 100%;
+  padding: var(--space-2);
+  border-radius: var(--radius-sm);
+  border: 1px solid var(--color-border);
+  background: var(--color-neutral-100);
+  overflow-wrap: anywhere;
+}
+
 .detail-summary {
   display: flex;
   flex-wrap: wrap;

frontend/src/app/features/admin/pages/admin-sessions.component.ts

@@ -135,6 +135,42 @@ export class AdminSessionsComponent implements OnInit {
     return `${hours}h ${minutes}m`;
   }
 
+  copySessionUuid(sessionId: string): void {
+    if (!sessionId) {
+      return;
+    }
+
+    if (navigator.clipboard?.writeText) {
+      navigator.clipboard.writeText(sessionId).then(
+        () => {
+          this.errorMessage = null;
+          this.successMessage = 'UUID sessione copiato.';
+        },
+        () => {
+          this.errorMessage = 'Impossibile copiare UUID sessione.';
+        },
+      );
+      return;
+    }
+
+    // Fallback for older browsers.
+    const textarea = document.createElement('textarea');
+    textarea.value = sessionId;
+    textarea.style.position = 'fixed';
+    textarea.style.opacity = '0';
+    document.body.appendChild(textarea);
+    textarea.select();
+    try {
+      document.execCommand('copy');
+      this.errorMessage = null;
+      this.successMessage = 'UUID sessione copiato.';
+    } catch {
+      this.errorMessage = 'Impossibile copiare UUID sessione.';
+    } finally {
+      document.body.removeChild(textarea);
+    }
+  }
+
   private extractErrorMessage(error: unknown, fallback: string): string {
     const err = error as { error?: { message?: string } };
     return err?.error?.message || fallback;

frontend/src/app/features/admin/pages/admin-shell.component.html

@@ -16,6 +16,9 @@
             >Richieste contatto</a
           >
           <a routerLink="sessions" routerLinkActive="active">Sessioni</a>
+          <a routerLink="cad-invoices" routerLinkActive="active"
+            >Fatture CAD</a
+          >
         </nav>
       </div>
 

frontend/src/app/features/admin/services/admin-operations.service.ts

@@ -115,6 +115,10 @@ export interface AdminQuoteSession {
   createdAt: string;
   expiresAt: string;
   convertedOrderId?: string;
+  sourceRequestId?: string;
+  cadHours?: number;
+  cadHourlyRateChf?: number;
+  cadTotalChf?: number;
 }
 
 export interface AdminQuoteSessionDetailItem {
@@ -136,14 +140,45 @@ export interface AdminQuoteSessionDetail {
     setupCostChf?: number;
     supportsEnabled?: boolean;
     notes?: string;
+    sourceRequestId?: string;
+    cadHours?: number;
+    cadHourlyRateChf?: number;
   };
   items: AdminQuoteSessionDetailItem[];
+  printItemsTotalChf: number;
+  cadTotalChf: number;
   itemsTotalChf: number;
   shippingCostChf: number;
   globalMachineCostChf: number;
   grandTotalChf: number;
 }
 
+export interface AdminCreateCadInvoicePayload {
+  sessionId?: string;
+  sourceRequestId?: string;
+  cadHours: number;
+  cadHourlyRateChf?: number;
+  notes?: string;
+}
+
+export interface AdminCadInvoice {
+  sessionId: string;
+  sessionStatus: string;
+  sourceRequestId?: string;
+  cadHours: number;
+  cadHourlyRateChf: number;
+  cadTotalChf: number;
+  printItemsTotalChf: number;
+  setupCostChf: number;
+  shippingCostChf: number;
+  grandTotalChf: number;
+  convertedOrderId?: string;
+  convertedOrderStatus?: string;
+  checkoutPath: string;
+  notes?: string;
+  createdAt: string;
+}
+
 @Injectable({
   providedIn: 'root',
 })
@@ -279,4 +314,20 @@ export class AdminOperationsService {
       { withCredentials: true },
     );
   }
+
+  listCadInvoices(): Observable<AdminCadInvoice[]> {
+    return this.http.get<AdminCadInvoice[]>(`${this.baseUrl}/cad-invoices`, {
+      withCredentials: true,
+    });
+  }
+
+  createCadInvoice(
+    payload: AdminCreateCadInvoicePayload,
+  ): Observable<AdminCadInvoice> {
+    return this.http.post<AdminCadInvoice>(
+      `${this.baseUrl}/cad-invoices`,
+      payload,
+      { withCredentials: true },
+    );
+  }
 }

frontend/src/app/features/admin/services/admin-orders.service.ts

@@ -24,6 +24,11 @@ export interface AdminOrder {
   customerEmail: string;
   totalChf: number;
   createdAt: string;
+  isCadOrder?: boolean;
+  sourceRequestId?: string;
+  cadHours?: number;
+  cadHourlyRateChf?: number;
+  cadTotalChf?: number;
   printMaterialCode?: string;
   printNozzleDiameterMm?: number;
   printLayerHeightMm?: number;

frontend/src/app/features/calculator/calculator-page.component.html

@@ -23,14 +23,16 @@
           <div
             class="mode-option"
             [class.active]="mode() === 'easy'"
-            (click)="mode.set('easy')"
+            [class.disabled]="cadSessionLocked()"
+            (click)="!cadSessionLocked() && mode.set('easy')"
           >
             {{ "CALC.MODE_EASY" | translate }}
           </div>
           <div
             class="mode-option"
             [class.active]="mode() === 'advanced'"
-            (click)="mode.set('advanced')"
+            [class.disabled]="cadSessionLocked()"
+            (click)="!cadSessionLocked() && mode.set('advanced')"
           >
             {{ "CALC.MODE_ADVANCED" | translate }}
           </div>
@@ -39,6 +41,7 @@
         <app-upload-form
           #uploadForm
           [mode]="mode()"
+          [lockedSettings]="cadSessionLocked()"
           [loading]="loading()"
           [uploadProgress]="uploadProgress()"
           (submitRequest)="onCalculate($event)"

frontend/src/app/features/calculator/calculator-page.component.scss

@@ -80,6 +80,11 @@
     font-weight: 600;
     box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
   }
+
+  &.disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+  }
 }
 
 .benefits {

frontend/src/app/features/calculator/calculator-page.component.ts

@@ -48,6 +48,7 @@ export class CalculatorPageComponent implements OnInit {
   loading = signal(false);
   uploadProgress = signal(0);
   result = signal<QuoteResult | null>(null);
+  cadSessionLocked = signal(false);
   error = signal<boolean>(false);
   errorKey = signal<string>('CALC.ERROR_GENERIC');
   isZeroQuoteError = computed(
@@ -100,6 +101,8 @@ export class CalculatorPageComponent implements OnInit {
         this.error.set(false);
         this.errorKey.set('CALC.ERROR_GENERIC');
         this.result.set(result);
+        const isCadSession = data?.session?.status === 'CAD_ACTIVE';
+        this.cadSessionLocked.set(isCadSession);
         this.step.set('quote');
 
         // 2. Determine Mode (Heuristic)
@@ -206,6 +209,7 @@ export class CalculatorPageComponent implements OnInit {
     this.error.set(false);
     this.errorKey.set('CALC.ERROR_GENERIC');
     this.result.set(null);
+    this.cadSessionLocked.set(false);
     this.orderSuccess.set(false);
 
     // Auto-scroll on mobile to make analysis visible
@@ -270,10 +274,10 @@ export class CalculatorPageComponent implements OnInit {
   onProceed() {
     const res = this.result();
     if (res && res.sessionId) {
-      this.router.navigate(
+      const segments = this.cadSessionLocked()
-        ['/', this.languageService.selectedLang(), 'checkout'],
+        ? ['/', this.languageService.selectedLang(), 'checkout', 'cad']
-        { queryParams: { session: res.sessionId } },
+        : ['/', this.languageService.selectedLang(), 'checkout'];
-      );
+      this.router.navigate(segments, { queryParams: { session: res.sessionId } });
     } else {
       console.error('No session ID found in quote result');
       // Fallback or error handling
@@ -343,6 +347,7 @@ export class CalculatorPageComponent implements OnInit {
   onNewQuote() {
     this.step.set('upload');
     this.result.set(null);
+    this.cadSessionLocked.set(false);
     this.orderSuccess.set(false);
     this.mode.set('easy'); // Reset to default
   }

frontend/src/app/features/calculator/components/quote-result/quote-result.component.html

@@ -28,6 +28,12 @@
           : { cost: (result().setupCost | currency: result().currency) }
     }}</small
     ><br />
+    @if ((result().cadTotal || 0) > 0) {
+      <small class="shipping-note" style="color: #666">
+        Servizio CAD: {{ result().cadTotal | currency: result().currency }}
+      </small>
+      <br />
+    }
     <small class="shipping-note" style="color: #666">{{
       "CALC.SHIPPING_NOTE" | translate
     }}</small>

frontend/src/app/features/calculator/components/quote-result/quote-result.component.ts

@@ -120,8 +120,9 @@ export class QuoteResultComponent implements OnDestroy {
   totals = computed(() => {
     const currentItems = this.items();
     const setup = this.result().setupCost;
+    const cad = this.result().cadTotal || 0;
 
-    let price = setup;
+    let price = setup + cad;
     let time = 0;
     let weight = 0;
 

frontend/src/app/features/calculator/components/upload-form/upload-form.component.html

@@ -118,6 +118,12 @@
   </div>
 
   <div class="grid">
+    @if (lockedSettings()) {
+      <p class="upload-privacy-note">
+        Parametri stampa bloccati per sessione CAD: materiale, nozzle, layer,
+        infill e supporti sono definiti dal back-office.
+      </p>
+    }
     <app-select
       formControlName="material"
       [label]="'CALC.MATERIAL' | translate"

frontend/src/app/features/calculator/components/upload-form/upload-form.component.ts

@@ -5,6 +5,7 @@ import {
   signal,
   OnInit,
   inject,
+  effect,
 } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import {
@@ -57,6 +58,7 @@ interface FormItem {
 })
 export class UploadFormComponent implements OnInit {
   mode = input<'easy' | 'advanced'>('easy');
+  lockedSettings = input<boolean>(false);
   loading = input<boolean>(false);
   uploadProgress = input<number>(0);
   submitRequest = output<QuoteRequest>();
@@ -139,6 +141,10 @@ export class UploadFormComponent implements OnInit {
       if (this.mode() !== 'easy' || this.isPatchingSettings) return;
       this.applyAdvancedPresetFromQuality(quality);
     });
+
+    effect(() => {
+      this.applySettingsLock(this.lockedSettings());
+    });
   }
 
   private applyAdvancedPresetFromQuality(quality: string | null | undefined) {
@@ -520,7 +526,7 @@ export class UploadFormComponent implements OnInit {
         this.form.value,
       );
       this.submitRequest.emit({
-        ...this.form.value,
+        ...this.form.getRawValue(),
         items: this.items(), // Pass the items array explicitly AFTER form value to prevent overwrite
         mode: this.mode(),
       });
@@ -554,4 +560,26 @@ export class UploadFormComponent implements OnInit {
   private normalizeFileName(fileName: string): string {
     return (fileName || '').split(/[\\/]/).pop()?.trim().toLowerCase() ?? '';
   }
+
+  private applySettingsLock(locked: boolean): void {
+    const controlsToLock = [
+      'material',
+      'quality',
+      'nozzleDiameter',
+      'infillPattern',
+      'layerHeight',
+      'infillDensity',
+      'supportEnabled',
+    ];
+
+    controlsToLock.forEach((name) => {
+      const control = this.form.get(name);
+      if (!control) return;
+      if (locked) {
+        control.disable({ emitEvent: false });
+      } else {
+        control.enable({ emitEvent: false });
+      }
+    });
+  }
 }

frontend/src/app/features/calculator/services/quote-estimator.service.ts

@@ -39,6 +39,8 @@ export interface QuoteResult {
   items: QuoteItem[];
   setupCost: number;
   globalMachineCost: number;
+  cadHours?: number;
+  cadTotal?: number;
   currency: string;
   totalPrice: number;
   totalTimeHours: number;
@@ -463,6 +465,8 @@ export class QuoteEstimatorService {
       })),
       setupCost: session.setupCostChf || 0,
       globalMachineCost: sessionData.globalMachineCostChf || 0,
+      cadHours: session.cadHours || 0,
+      cadTotal: sessionData.cadTotalChf || 0,
       currency: 'CHF', // Fixed for now
       totalPrice:
         (sessionData.itemsTotalChf || 0) +

frontend/src/app/features/checkout/checkout.component.html

@@ -1,6 +1,12 @@
 <div class="checkout-page">
   <div class="container hero">
     <h1 class="section-title">{{ "CHECKOUT.TITLE" | translate }}</h1>
+    <p class="cad-subtitle" *ngIf="isCadSession()">
+      Servizio CAD
+      <ng-container *ngIf="cadRequestId()">
+        riferito alla richiesta contatto #{{ cadRequestId() }}
+      </ng-container>
+    </p>
   </div>
 
   <div class="container">
@@ -260,6 +266,17 @@
                 </small>
               </div>
             </div>
+            <div class="summary-item cad-summary-item" *ngIf="cadTotal() > 0">
+              <div class="item-details">
+                <span class="item-name">Servizio CAD</span>
+                <div class="item-specs-sub">{{ cadHours() }}h</div>
+              </div>
+              <div class="item-price">
+                <span class="item-total-price">
+                  {{ cadTotal() | currency: "CHF" }}
+                </span>
+              </div>
+            </div>
           </div>
 
           <div class="summary-totals" *ngIf="quoteSession() as session">

frontend/src/app/features/checkout/checkout.component.scss

@@ -8,6 +8,11 @@
   }
 }
 
+.cad-subtitle {
+  margin: 0;
+  color: var(--color-text-muted);
+}
+
 .checkout-layout {
   display: grid;
   grid-template-columns: 1fr 420px;
@@ -260,6 +265,13 @@ app-toggle-selector.user-type-selector-compact {
   }
 }
 
+.cad-summary-item {
+  background: var(--color-neutral-100);
+  border-radius: var(--radius-sm);
+  padding-left: var(--space-3);
+  padding-right: var(--space-3);
+}
+
 .summary-totals {
   background: var(--color-neutral-100);
   padding: var(--space-4);

frontend/src/app/features/checkout/checkout.component.ts

@@ -162,6 +162,22 @@ export class CheckoutComponent implements OnInit {
     });
   }
 
+  isCadSession(): boolean {
+    return this.quoteSession()?.session?.status === 'CAD_ACTIVE';
+  }
+
+  cadRequestId(): string | null {
+    return this.quoteSession()?.session?.sourceRequestId ?? null;
+  }
+
+  cadHours(): number {
+    return this.quoteSession()?.session?.cadHours ?? 0;
+  }
+
+  cadTotal(): number {
+    return this.quoteSession()?.cadTotalChf ?? 0;
+  }
+
   onSubmit() {
     if (this.checkoutForm.invalid) {
       return;

frontend/src/app/features/order/order.component.html

@@ -198,6 +198,10 @@
                 <span>{{ "PAYMENT.SUBTOTAL" | translate }}</span>
                 <span>{{ o.subtotalChf | currency: "CHF" }}</span>
               </div>
+              <div class="total-row" *ngIf="o.cadTotalChf > 0">
+                <span>Servizio CAD ({{ o.cadHours || 0 }}h)</span>
+                <span>{{ o.cadTotalChf | currency: "CHF" }}</span>
+              </div>
               <div class="total-row">
                 <span>{{ "PAYMENT.SHIPPING" | translate }}</span>
                 <span>{{ o.shippingCostChf | currency: "CHF" }}</span>