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

@@ -0,0 +1,131 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.CustomQuoteRequest;
+import com.printcalculator.entity.CustomQuoteRequestAttachment;
+import com.printcalculator.repository.CustomQuoteRequestAttachmentRepository;
+import com.printcalculator.repository.CustomQuoteRequestRepository;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/custom-quote-requests")
+@CrossOrigin(origins = "*")
+public class CustomQuoteRequestController {
+
+    private final CustomQuoteRequestRepository requestRepo;
+    private final CustomQuoteRequestAttachmentRepository attachmentRepo;
+    
+    // TODO: Inject Storage Service
+    private static final String STORAGE_ROOT = "storage_requests";
+
+    public CustomQuoteRequestController(CustomQuoteRequestRepository requestRepo,
+                                        CustomQuoteRequestAttachmentRepository attachmentRepo) {
+        this.requestRepo = requestRepo;
+        this.attachmentRepo = attachmentRepo;
+    }
+
+    // 1. Create Custom Quote Request
+    @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<CustomQuoteRequest> createCustomQuoteRequest(
+            // Form fields
+            @RequestParam("requestType") String requestType,
+            @RequestParam("customerType") String customerType,
+            @RequestParam("email") String email,
+            @RequestParam(value = "phone", required = false) String phone,
+            @RequestParam(value = "name", required = false) String name,
+            @RequestParam(value = "companyName", required = false) String companyName,
+            @RequestParam(value = "contactPerson", required = false) String contactPerson,
+            @RequestParam("message") String message,
+            // Files (Max 15)
+            @RequestParam(value = "files", required = false) List<MultipartFile> files
+    ) throws IOException {
+        
+        // 1. Create Request
+        CustomQuoteRequest request = new CustomQuoteRequest();
+        request.setRequestType(requestType);
+        request.setCustomerType(customerType);
+        request.setEmail(email);
+        request.setPhone(phone);
+        request.setName(name);
+        request.setCompanyName(companyName);
+        request.setContactPerson(contactPerson);
+        request.setMessage(message);
+        request.setStatus("PENDING");
+        request.setCreatedAt(OffsetDateTime.now());
+        request.setUpdatedAt(OffsetDateTime.now());
+        
+        request = requestRepo.save(request);
+        
+        // 2. Handle Attachments
+        if (files != null && !files.isEmpty()) {
+            if (files.size() > 15) {
+                throw new IOException("Too many files. Max 15 allowed.");
+            }
+            
+            for (MultipartFile file : files) {
+                if (file.isEmpty()) continue;
+                
+                CustomQuoteRequestAttachment attachment = new CustomQuoteRequestAttachment();
+                attachment.setRequest(request);
+                attachment.setOriginalFilename(file.getOriginalFilename());
+                attachment.setMimeType(file.getContentType());
+                attachment.setFileSizeBytes(file.getSize());
+                attachment.setCreatedAt(OffsetDateTime.now());
+                
+                // Generate path
+                UUID fileUuid = UUID.randomUUID();
+                String ext = getExtension(file.getOriginalFilename());
+                String storedFilename = fileUuid.toString() + "." + ext;
+                
+                // Note: We don't have attachment ID yet.
+                // We'll save attachment first to get ID.
+                attachment.setStoredFilename(storedFilename);
+                attachment.setStoredRelativePath("PENDING");
+                
+                attachment = attachmentRepo.save(attachment);
+                
+                String relativePath = "quote-requests/" + request.getId() + "/attachments/" + attachment.getId() + "/" + storedFilename;
+                attachment.setStoredRelativePath(relativePath);
+                attachmentRepo.save(attachment);
+                
+                // Save file to disk
+                Path absolutePath = Paths.get(STORAGE_ROOT, relativePath);
+                Files.createDirectories(absolutePath.getParent());
+                Files.copy(file.getInputStream(), absolutePath);
+            }
+        }
+        
+        return ResponseEntity.ok(request);
+    }
+    
+    // 2. Get Request
+    @GetMapping("/{id}")
+    public ResponseEntity<CustomQuoteRequest> getCustomQuoteRequest(@PathVariable UUID id) {
+        return requestRepo.findById(id)
+                .map(ResponseEntity::ok)
+                .orElse(ResponseEntity.notFound().build());
+    }
+    
+    // Helper
+    private String getExtension(String filename) {
+        if (filename == null) return "dat";
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            return filename.substring(i + 1);
+        }
+        return "dat";
+    }
+}

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

@@ -0,0 +1,285 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.*;
+import com.printcalculator.repository.*;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.UUID;
+import java.util.Optional;
+
+@RestController
+@RequestMapping("/api/orders")
+@CrossOrigin(origins = "*")
+public class OrderController {
+
+    private final OrderRepository orderRepo;
+    private final OrderItemRepository orderItemRepo;
+    private final QuoteSessionRepository quoteSessionRepo;
+    private final QuoteLineItemRepository quoteLineItemRepo;
+    private final CustomerRepository customerRepo;
+
+    // TODO: Inject Storage Service or use a base path property
+    private static final String STORAGE_ROOT = "storage_orders"; 
+
+    public OrderController(OrderRepository orderRepo,
+                           OrderItemRepository orderItemRepo,
+                           QuoteSessionRepository quoteSessionRepo,
+                           QuoteLineItemRepository quoteLineItemRepo,
+                           CustomerRepository customerRepo) {
+        this.orderRepo = orderRepo;
+        this.orderItemRepo = orderItemRepo;
+        this.quoteSessionRepo = quoteSessionRepo;
+        this.quoteLineItemRepo = quoteLineItemRepo;
+        this.customerRepo = customerRepo;
+    }
+
+    // DTOs
+    public static class CreateOrderRequest {
+        public CustomerDto customer;
+        public AddressDto billingAddress;
+        public AddressDto shippingAddress;
+        public boolean shippingSameAsBilling;
+    }
+
+    public static class CustomerDto {
+        public String email;
+        public String phone;
+        public String customerType; // "PRIVATE", "BUSINESS"
+    }
+
+    public static class AddressDto {
+        public String firstName;
+        public String lastName;
+        public String companyName;
+        public String contactPerson;
+        public String addressLine1;
+        public String addressLine2;
+        public String zip;
+        public String city;
+        public String countryCode;
+    }
+
+    // 1. Create Order from Quote
+    @PostMapping("/from-quote/{quoteSessionId}")
+    @Transactional
+    public ResponseEntity<Order> createOrderFromQuote(
+            @PathVariable UUID quoteSessionId,
+            @RequestBody CreateOrderRequest request
+    ) {
+        // 1. Fetch Quote Session
+        QuoteSession session = quoteSessionRepo.findById(quoteSessionId)
+                .orElseThrow(() -> new RuntimeException("Quote Session not found"));
+
+        if (!"ACTIVE".equals(session.getStatus())) {
+             // Allow converting only active sessions? Or check if not already converted?
+             // checking convertedOrderId might be better
+        }
+        if (session.getConvertedOrderId() != null) {
+            return ResponseEntity.badRequest().body(null); // Already converted
+        }
+
+        // 2. Handle Customer (Find or Create)
+        Customer customer = customerRepo.findByEmail(request.customer.email)
+                .orElseGet(() -> {
+                    Customer newC = new Customer();
+                    newC.setEmail(request.customer.email);
+                    newC.setCreatedAt(OffsetDateTime.now());
+                    return customerRepo.save(newC);
+                });
+        // Update customer details?
+        customer.setPhone(request.customer.phone);
+        customer.setCustomerType(request.customer.customerType);
+        customer.setUpdatedAt(OffsetDateTime.now());
+        customerRepo.save(customer);
+
+        // 3. Create Order
+        Order order = new Order();
+        order.setSourceQuoteSession(session);
+        order.setCustomer(customer);
+        order.setCustomerEmail(request.customer.email);
+        order.setCustomerPhone(request.customer.phone);
+        order.setStatus("PENDING_PAYMENT");
+        order.setCreatedAt(OffsetDateTime.now());
+        order.setUpdatedAt(OffsetDateTime.now());
+        order.setCurrency("CHF");
+
+        // Billing
+        order.setBillingCustomerType(request.customer.customerType);
+        if (request.billingAddress != null) {
+            order.setBillingFirstName(request.billingAddress.firstName);
+            order.setBillingLastName(request.billingAddress.lastName);
+            order.setBillingCompanyName(request.billingAddress.companyName);
+            order.setBillingContactPerson(request.billingAddress.contactPerson);
+            order.setBillingAddressLine1(request.billingAddress.addressLine1);
+            order.setBillingAddressLine2(request.billingAddress.addressLine2);
+            order.setBillingZip(request.billingAddress.zip);
+            order.setBillingCity(request.billingAddress.city);
+            order.setBillingCountryCode(request.billingAddress.countryCode != null ? request.billingAddress.countryCode : "CH");
+        }
+
+        // Shipping
+        order.setShippingSameAsBilling(request.shippingSameAsBilling);
+        if (!request.shippingSameAsBilling && request.shippingAddress != null) {
+             order.setShippingFirstName(request.shippingAddress.firstName);
+             order.setShippingLastName(request.shippingAddress.lastName);
+             order.setShippingCompanyName(request.shippingAddress.companyName);
+             order.setShippingContactPerson(request.shippingAddress.contactPerson);
+             order.setShippingAddressLine1(request.shippingAddress.addressLine1);
+             order.setShippingAddressLine2(request.shippingAddress.addressLine2);
+             order.setShippingZip(request.shippingAddress.zip);
+             order.setShippingCity(request.shippingAddress.city);
+             order.setShippingCountryCode(request.shippingAddress.countryCode != null ? request.shippingAddress.countryCode : "CH");
+        } else {
+            // Copy billing to shipping? Or leave empty and rely on flag?
+            // Usually explicit copy is safer for queries
+            order.setShippingFirstName(order.getBillingFirstName());
+            order.setShippingLastName(order.getBillingLastName());
+            order.setShippingCompanyName(order.getBillingCompanyName());
+            order.setShippingContactPerson(order.getBillingContactPerson());
+            order.setShippingAddressLine1(order.getBillingAddressLine1());
+            order.setShippingAddressLine2(order.getBillingAddressLine2());
+            order.setShippingZip(order.getBillingZip());
+            order.setShippingCity(order.getBillingCity());
+            order.setShippingCountryCode(order.getBillingCountryCode());
+        }
+
+        // Financials from Session (Assuming mocked/calculated in session)
+        // We re-calculate totals from line items to be safe
+        List<QuoteLineItem> quoteItems = quoteLineItemRepo.findByQuoteSessionId(quoteSessionId);
+        
+        BigDecimal subtotal = BigDecimal.ZERO;
+        
+        // Save Order first to get ID
+        order = orderRepo.save(order);
+
+        // 4. Create Order Items
+        for (QuoteLineItem qItem : quoteItems) {
+            OrderItem oItem = new OrderItem();
+            oItem.setOrder(order);
+            oItem.setOriginalFilename(qItem.getOriginalFilename());
+            oItem.setQuantity(qItem.getQuantity());
+            oItem.setColorCode(qItem.getColorCode());
+            oItem.setMaterialCode(session.getMaterialCode()); // Or per item if supported
+            
+            // Pricing
+            oItem.setUnitPriceChf(qItem.getUnitPriceChf());
+            oItem.setLineTotalChf(qItem.getUnitPriceChf().multiply(BigDecimal.valueOf(qItem.getQuantity())));
+            oItem.setPrintTimeSeconds(qItem.getPrintTimeSeconds());
+            oItem.setMaterialGrams(qItem.getMaterialGrams());
+            
+            // File Handling Check
+            // "orders/{orderId}/3d-files/{orderItemId}/{uuid}.{ext}"
+            UUID fileUuid = UUID.randomUUID();
+            String ext = getExtension(qItem.getOriginalFilename());
+            String storedFilename = fileUuid.toString() + "." + ext;
+            
+            // Note: We don't have the orderItemId yet because we haven't saved it. 
+            // We can pre-generate ID or save order item then update path?
+            // GeneratedValue strategy AUTO might not let us set ID easily?
+            // Let's save item first with temporary path, then update?
+            // OR use a path structure that doesn't depend on ItemId? "orders/{orderId}/3d-files/{uuid}.ext" is also fine?
+            // User requested: "orders/{orderId}/3d-files/{orderItemId}/{uuid}.{ext}"
+            // So we need OrderItemId.
+            
+            oItem.setStoredFilename(storedFilename);
+            oItem.setStoredRelativePath("PENDING"); // Placeholder
+            oItem.setMimeType("application/octet-stream"); // specific type if known
+            
+            oItem = orderItemRepo.save(oItem);
+            
+            // Update Path now that we have ID
+            String relativePath = "orders/" + order.getId() + "/3d-files/" + oItem.getId() + "/" + storedFilename;
+            oItem.setStoredRelativePath(relativePath);
+            orderItemRepo.save(oItem);
+            
+            subtotal = subtotal.add(oItem.getLineTotalChf());
+        }
+
+        // Update Order Totals
+        order.setSubtotalChf(subtotal);
+        order.setSetupCostChf(session.getSetupCostChf());
+        order.setShippingCostChf(BigDecimal.valueOf(9.00)); // Default shipping? or 0?
+        // TODO: Calc implementation for shipping
+        
+        BigDecimal total = subtotal.add(order.getSetupCostChf()).add(order.getShippingCostChf()).subtract(order.getDiscountChf() != null ? order.getDiscountChf() : BigDecimal.ZERO);
+        order.setTotalChf(total);
+        
+        // Link session
+        session.setConvertedOrderId(order.getId());
+        session.setStatus("CONVERTED"); // or CLOSED
+        quoteSessionRepo.save(session);
+        
+        return ResponseEntity.ok(orderRepo.save(order));
+    }
+    
+    // 2. Upload file for Order Item
+    @PostMapping(value = "/{orderId}/items/{orderItemId}/file", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<Void> uploadOrderItemFile(
+        @PathVariable UUID orderId,
+        @PathVariable UUID orderItemId,
+        @RequestParam("file") MultipartFile file
+    ) throws IOException {
+        
+        OrderItem item = orderItemRepo.findById(orderItemId)
+                .orElseThrow(() -> new RuntimeException("OrderItem not found"));
+                
+        if (!item.getOrder().getId().equals(orderId)) {
+            return ResponseEntity.badRequest().build();
+        }
+        
+        // Ensure path logic
+        String relativePath = item.getStoredRelativePath();
+        if (relativePath == null || relativePath.equals("PENDING")) {
+             // Should verify consistency
+             // If we used the logic above, it should have a path.
+             // If it's "PENDING", regen it.
+             String ext = getExtension(file.getOriginalFilename());
+             String storedFilename = UUID.randomUUID().toString() + "." + ext;
+             relativePath = "orders/" + orderId + "/3d-files/" + orderItemId + "/" + storedFilename;
+             item.setStoredRelativePath(relativePath);
+             item.setStoredFilename(storedFilename);
+             // Update item
+        }
+        
+        // Save file to disk
+        Path absolutePath = Paths.get(STORAGE_ROOT, relativePath);
+        Files.createDirectories(absolutePath.getParent());
+        
+        if (Files.exists(absolutePath)) {
+            Files.delete(absolutePath); // Overwrite?
+        }
+        
+        Files.copy(file.getInputStream(), absolutePath);
+        
+        item.setFileSizeBytes(file.getSize());
+        item.setMimeType(file.getContentType());
+        // Calculate SHA256? (Optional)
+        
+        orderItemRepo.save(item);
+        
+        return ResponseEntity.ok().build();
+    }
+    
+    private String getExtension(String filename) {
+        if (filename == null) return "stl";
+        int i = filename.lastIndexOf('.');
+        if (i > 0) {
+            return filename.substring(i + 1);
+        }
+        return "stl";
+    }
+
+}

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

@@ -0,0 +1,226 @@
+package com.printcalculator.controller;
+
+import com.printcalculator.entity.PrinterMachine;
+import com.printcalculator.entity.QuoteLineItem;
+import com.printcalculator.entity.QuoteSession;
+import com.printcalculator.model.PrintStats;
+import com.printcalculator.model.QuoteResult;
+import com.printcalculator.repository.PrinterMachineRepository;
+import com.printcalculator.repository.QuoteLineItemRepository;
+import com.printcalculator.repository.QuoteSessionRepository;
+import com.printcalculator.service.QuoteCalculator;
+import com.printcalculator.service.SlicerService;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.OffsetDateTime;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/quote-sessions")
+@CrossOrigin(origins = "*") // Allow CORS for dev
+public class QuoteSessionController {
+
+    private final QuoteSessionRepository sessionRepo;
+    private final QuoteLineItemRepository lineItemRepo;
+    private final SlicerService slicerService;
+    private final QuoteCalculator quoteCalculator;
+    private final PrinterMachineRepository machineRepo;
+
+    // Defaults
+    private static final String DEFAULT_FILAMENT = "pla_basic";
+    private static final String DEFAULT_PROCESS = "standard";
+
+    public QuoteSessionController(QuoteSessionRepository sessionRepo,
+                                  QuoteLineItemRepository lineItemRepo,
+                                  SlicerService slicerService,
+                                  QuoteCalculator quoteCalculator,
+                                  PrinterMachineRepository machineRepo) {
+        this.sessionRepo = sessionRepo;
+        this.lineItemRepo = lineItemRepo;
+        this.slicerService = slicerService;
+        this.quoteCalculator = quoteCalculator;
+        this.machineRepo = machineRepo;
+    }
+
+    // 1. Start a new session with a file
+    @PostMapping(value = "/line-items", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<QuoteSession> createSessionAndAddItem(
+            @RequestParam("file") MultipartFile file
+    ) throws IOException {
+        // Create new session
+        QuoteSession session = new QuoteSession();
+        session.setStatus("ACTIVE");
+        session.setPricingVersion("v1"); // Placeholder
+        session.setMaterialCode(DEFAULT_FILAMENT); // Default for session
+        session.setSupportsEnabled(false);
+        session.setCreatedAt(OffsetDateTime.now());
+        session.setExpiresAt(OffsetDateTime.now().plusDays(30)); 
+        // Set defaults
+        session.setSetupCostChf(BigDecimal.ZERO);
+        
+        session = sessionRepo.save(session);
+
+        // Process file and add item
+        addItemToSession(session, file);
+        
+        // Refresh session to return updated data (if we added list fetching to repo, otherwise manually fetch items if needed for response)
+        // For now, let's just return the session. The client might need to fetch items separately or we can return a DTO.
+        // User request: "ritorna sessione + line items + total"
+        // Since QuoteSession entity doesn't have a @OneToMany list of items (it has OneToMany usually but mapped by item), 
+        // we might need a DTO or just rely on the fact that we might add the list to the entity if valid.
+        // Looking at QuoteSession.java, it does NOT have a list of items.
+        // So we should probably return a DTO or just return the Session and Client calls GET /quote-sessions/{id} immediately?
+        // User request: "ritorna quoteSessionId" (actually implies just ID, but likely wants full object).
+        // "ritorna sessione + line items + total (usa view o calcolo service)" refers to GET /quote-sessions/{id}
+        
+        // Let's return the full session details including items in a DTO/Map/wrapper?
+        // Or just the session for now. The user said "ritorna quoteSessionId" for this specific endpoint.
+        // Let's return the Session entity for now.
+        return ResponseEntity.ok(session);
+    }
+    
+    // 2. Add item to existing session
+    @PostMapping(value = "/{id}/line-items", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
+    @Transactional
+    public ResponseEntity<QuoteLineItem> addItemToExistingSession(
+            @PathVariable UUID id,
+            @RequestParam("file") MultipartFile file
+    ) throws IOException {
+        QuoteSession session = sessionRepo.findById(id)
+                .orElseThrow(() -> new RuntimeException("Session not found"));
+
+        QuoteLineItem item = addItemToSession(session, file);
+        return ResponseEntity.ok(item);
+    }
+
+    // Helper to add item
+    private QuoteLineItem addItemToSession(QuoteSession session, MultipartFile file) throws IOException {
+        if (file.isEmpty()) throw new IOException("File is empty");
+
+        // 1. Save file temporarily
+        Path tempInput = Files.createTempFile("upload_", "_" + file.getOriginalFilename());
+        file.transferTo(tempInput.toFile());
+
+        try {
+            // 2. Mock Calc or Real Calc
+            // The user said: "per ora calcolo mock" (mock calculation) but we have SlicerService. 
+            // "Nota: il calcolo può essere stub: set print_time_seconds/material_grams/unit_price_chf a valori placeholder."
+            // However, since we have the SlicerService, we CAN try to use it if we want, OR just use stub as requested to be fast?
+            // "avvia calcolo (per ora calcolo mock)" -> I will use a simple Stub to satisfy the requirement immediately.
+            // But I will also implement the structure to swap to Real Calc.
+            
+            // STUB CALCULATION as requested
+            int printTime = 3600; // 1 hour
+            BigDecimal materialGrams = new BigDecimal("50.00");
+            BigDecimal unitPrice = new BigDecimal("15.00");
+            
+            // 3. Create Line Item
+            QuoteLineItem item = new QuoteLineItem();
+            item.setQuoteSession(session);
+            item.setOriginalFilename(file.getOriginalFilename());
+            item.setQuantity(1);
+            item.setColorCode("#FFFFFF"); // Default
+            item.setStatus("CALCULATED");
+            
+            item.setPrintTimeSeconds(printTime);
+            item.setMaterialGrams(materialGrams);
+            item.setUnitPriceChf(unitPrice);
+            item.setPricingBreakdown(Map.of("mock", true));
+            
+            // Set simple bounding box
+            item.setBoundingBoxXMm(BigDecimal.valueOf(100));
+            item.setBoundingBoxYMm(BigDecimal.valueOf(100));
+            item.setBoundingBoxZMm(BigDecimal.valueOf(20));
+            
+            item.setCreatedAt(OffsetDateTime.now());
+            item.setUpdatedAt(OffsetDateTime.now());
+            
+            return lineItemRepo.save(item);
+
+        } finally {
+            Files.deleteIfExists(tempInput);
+        }
+    }
+
+    // 3. Update Line Item
+    @PatchMapping("/line-items/{lineItemId}")
+    @Transactional
+    public ResponseEntity<QuoteLineItem> updateLineItem(
+            @PathVariable UUID lineItemId,
+            @RequestBody Map<String, Object> updates
+    ) {
+        QuoteLineItem item = lineItemRepo.findById(lineItemId)
+                .orElseThrow(() -> new RuntimeException("Item not found"));
+        
+        if (updates.containsKey("quantity")) {
+            item.setQuantity((Integer) updates.get("quantity"));
+        }
+        if (updates.containsKey("color_code")) {
+            item.setColorCode((String) updates.get("color_code"));
+        }
+        
+        // Recalculate price if needed? 
+        // For now, unit price is fixed in mock. Total is calculated on GET.
+        
+        item.setUpdatedAt(OffsetDateTime.now());
+        return ResponseEntity.ok(lineItemRepo.save(item));
+    }
+    
+    // 4. Delete Line Item
+    @DeleteMapping("/{sessionId}/line-items/{lineItemId}")
+    @Transactional
+    public ResponseEntity<Void> deleteLineItem(
+            @PathVariable UUID sessionId,
+            @PathVariable UUID lineItemId
+    ) {
+        // Verify item belongs to session?
+        QuoteLineItem item = lineItemRepo.findById(lineItemId)
+                .orElseThrow(() -> new RuntimeException("Item not found"));
+        
+        if (!item.getQuoteSession().getId().equals(sessionId)) {
+            return ResponseEntity.badRequest().build();
+        }
+        
+        lineItemRepo.delete(item);
+        return ResponseEntity.noContent().build();
+    }
+    
+    // 5. Get Session (Session + Items + Total)
+    @GetMapping("/{id}")
+    public ResponseEntity<Map<String, Object>> getQuoteSession(@PathVariable UUID id) {
+        QuoteSession session = sessionRepo.findById(id)
+                .orElseThrow(() -> new RuntimeException("Session not found"));
+        
+        List<QuoteLineItem> items = lineItemRepo.findByQuoteSessionId(id);
+        
+        // Calculate Totals
+        BigDecimal itemsTotal = BigDecimal.ZERO;
+        for (QuoteLineItem item : items) {
+            BigDecimal lineTotal = item.getUnitPriceChf().multiply(BigDecimal.valueOf(item.getQuantity()));
+            itemsTotal = itemsTotal.add(lineTotal);
+        }
+        
+        BigDecimal setupFee = session.getSetupCostChf() != null ? session.getSetupCostChf() : BigDecimal.ZERO;
+        BigDecimal grandTotal = itemsTotal.add(setupFee);
+        
+        Map<String, Object> response = new HashMap<>();
+        response.put("session", session);
+        response.put("items", items);
+        response.put("itemsTotalChf", itemsTotal);
+        response.put("grandTotalChf", grandTotal);
+        
+        return ResponseEntity.ok(response);
+    }
+}

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

@@ -116,4 +116,6 @@ public class CustomQuoteRequestAttachment {
         this.createdAt = createdAt;
     }
 
+    public void setCustomQuoteRequest(CustomQuoteRequest request) {
+    }
 }

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

@@ -1,29 +0,0 @@
-package com.printcalculator.entity;
-
-import jakarta.persistence.Column;
-import jakarta.persistence.Entity;
-import jakarta.persistence.Table;
-import org.hibernate.annotations.Immutable;
-
-import java.math.BigDecimal;
-import java.util.UUID;
-
-@Entity
-@Immutable
-@Table(name = "quote_session_totals")
-public class QuoteSessionTotal {
-    @Column(name = "quote_session_id")
-    private UUID quoteSessionId;
-
-    @Column(name = "total_chf")
-    private BigDecimal totalChf;
-
-    public UUID getQuoteSessionId() {
-        return quoteSessionId;
-    }
-
-    public BigDecimal getTotalChf() {
-        return totalChf;
-    }
-
-}

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

@@ -3,7 +3,9 @@ package com.printcalculator.repository;
 import com.printcalculator.entity.Customer;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.Optional;
 import java.util.UUID;
 
 public interface CustomerRepository extends JpaRepository<Customer, UUID> {
+    Optional<Customer> findByEmail(String email);
 }

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

@@ -3,7 +3,9 @@ package com.printcalculator.repository;
 import com.printcalculator.entity.QuoteLineItem;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.UUID;
 
 public interface QuoteLineItemRepository extends JpaRepository<QuoteLineItem, UUID> {
+    List<QuoteLineItem> findByQuoteSessionId(UUID quoteSessionId);
 }

frontend/src/app/app.routes.ts

@@ -28,6 +28,10 @@ export const routes: Routes = [
       {
         path: '',
         loadChildren: () => import('./features/legal/legal.routes').then(m => m.LEGAL_ROUTES)
+      },
+      {
+        path: 'payment/:orderId',
+        loadComponent: () => import('./features/payment/payment.component').then(m => m.PaymentComponent)
       }
     ]
   }

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

@@ -0,0 +1,21 @@
+<div class="payment-container">
+  <mat-card class="payment-card">
+    <mat-card-header>
+      <mat-icon mat-card-avatar>payment</mat-icon>
+      <mat-card-title>Payment Integration</mat-card-title>
+      <mat-card-subtitle>Order #{{ orderId }}</mat-card-subtitle>
+    </mat-card-header>
+    <mat-card-content>
+      <div class="coming-soon">
+        <h3>Coming Soon</h3>
+        <p>The online payment system is currently under development.</p>
+        <p>Your order has been saved. Please contact us to arrange payment.</p>
+      </div>
+    </mat-card-content>
+    <mat-card-actions align="end">
+      <button mat-raised-button color="primary" (click)="completeOrder()">
+        Simulate Payment Completion
+      </button>
+    </mat-card-actions>
+  </mat-card>
+</div>

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

@@ -0,0 +1,35 @@
+.payment-container {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-height: 80vh;
+  padding: 2rem;
+  background-color: #f5f5f5;
+}
+
+.payment-card {
+  max-width: 500px;
+  width: 100%;
+}
+
+.coming-soon {
+  text-align: center;
+  padding: 2rem 0;
+  
+  h3 {
+    margin-bottom: 1rem;
+    color: #555;
+  }
+  
+  p {
+    color: #777;
+    margin-bottom: 0.5rem;
+  }
+}
+
+mat-icon {
+  font-size: 40px;
+  width: 40px;
+  height: 40px;
+  color: #3f51b5;
+}

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

@@ -0,0 +1,34 @@
+import { Component, OnInit } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { ActivatedRoute, Router } from '@angular/router';
+import { MatButtonModule } from '@angular/material/button';
+import { MatCardModule } from '@angular/material/card';
+import { MatIconModule } from '@angular/material/icon';
+
+@Component({
+  selector: 'app-payment',
+  standalone: true,
+  imports: [CommonModule, MatButtonModule, MatCardModule, MatIconModule],
+  templateUrl: './payment.component.html',
+  styleUrl: './payment.component.scss'
+})
+export class PaymentComponent implements OnInit {
+  orderId: string | null = null;
+
+  constructor(
+    private route: ActivatedRoute,
+    private router: Router
+  ) {}
+
+  ngOnInit(): void {
+    this.orderId = this.route.snapshot.paramMap.get('orderId');
+  }
+
+  completeOrder(): void {
+    // Simulate payment completion
+    alert('Payment Simulated! Order marked as PAID.');
+    // Here you would call the backend to mark as paid if we had that endpoint ready
+    // For now, redirect home or show success
+    this.router.navigate(['/']);
+  }
+}