Merge remote-tracking branch 'origin/feat/brand-logo' into feat/brand-logo

Reviewed-on: #48

.gitea/workflows/deploy.yaml

@@ -217,9 +217,12 @@ jobs:
           ADMIN_TTL="${ADMIN_TTL:-480}"
           printf 'ADMIN_PASSWORD="%s"\nADMIN_SESSION_SECRET="%s"\nADMIN_SESSION_TTL_MINUTES="%s"\n' \
             "${{ secrets.ADMIN_PASSWORD }}" "${{ secrets.ADMIN_SESSION_SECRET }}" "$ADMIN_TTL" >> /tmp/full_env.env
+          if [[ -n "${{ secrets.OPENAI_API_KEY }}" ]]; then
+            printf 'OPENAI_API_KEY="%s"\n' "${{ secrets.OPENAI_API_KEY }}" >> /tmp/full_env.env
+          fi
 
           echo "Preparing to send env file with variables:"
-          grep -Ev "PASSWORD|SECRET" /tmp/full_env.env || true
+          grep -Ev "PASSWORD|SECRET|KEY|TOKEN" /tmp/full_env.env || true
 
           ssh -i ~/.ssh/id_ed25519 -o BatchMode=yes "${{ secrets.SERVER_USER }}@${{ secrets.SERVER_HOST }}" \
             "setenv ${{ env.ENV }}" < /tmp/full_env.env

README.md

@@ -111,3 +111,6 @@ Verifica che `MEDIA_FFMPEG_PATH` punti a un `ffmpeg` con supporto JPEG, WebP e A
 
 ### Database connection
 Verifica le credenziali in `application.properties`. Se usi Docker, puoi passare `DB_URL`, `DB_USERNAME` e `DB_PASSWORD` come variabili d'ambiente.
+
+### Deploy e traduzioni OpenAI
+Nel deploy Gitea la chiave OpenAI deve stare nel secret `OPENAI_API_KEY`. La pipeline la aggiunge al file `.env` dell'ambiente durante il deploy e il container backend la riceve come variabile runtime. I file `deploy/envs/*.env` restano per i valori specifici di `dev/int/prod`.

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

@@ -18,6 +18,7 @@ import java.math.BigDecimal;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 
 import static org.springframework.http.HttpStatus.BAD_REQUEST;
@@ -124,6 +125,9 @@ public class QuoteController {
         if (file.isEmpty()) {
             return ResponseEntity.badRequest().build();
         }
+        if (!isSupportedInputFile(file)) {
+            throw new ResponseStatusException(BAD_REQUEST, "Unsupported file type. Allowed: stl, 3mf");
+        }
 
         // Scan for virus
         clamAVService.scan(file.getInputStream());
@@ -153,4 +157,14 @@ public class QuoteController {
             Files.deleteIfExists(tempInput);
         }
     }
+
+    private boolean isSupportedInputFile(MultipartFile file) {
+        String originalFilename = file.getOriginalFilename();
+        if (originalFilename == null || originalFilename.isBlank()) {
+            return false;
+        }
+
+        String normalized = originalFilename.toLowerCase(Locale.ROOT);
+        return normalized.endsWith(".stl") || normalized.endsWith(".3mf");
+    }
 }

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

@@ -130,6 +130,7 @@ public class QuoteSessionController {
     }
 
     @GetMapping("/{id}")
+    @Transactional(readOnly = true)
     public ResponseEntity<Map<String, Object>> getQuoteSession(@PathVariable UUID id) {
         QuoteSession session = sessionRepo.findById(id)
                 .orElseThrow(() -> new RuntimeException("Session not found"));

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

@@ -1,8 +1,11 @@
 package com.printcalculator.controller.admin;
 
 import com.printcalculator.dto.AdminShopProductDto;
+import com.printcalculator.dto.AdminTranslateShopProductRequest;
+import com.printcalculator.dto.AdminTranslateShopProductResponse;
 import com.printcalculator.dto.AdminUpsertShopProductRequest;
 import com.printcalculator.service.admin.AdminShopProductControllerService;
+import com.printcalculator.service.admin.AdminShopProductTranslationService;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.UrlResource;
 import org.springframework.http.HttpHeaders;
@@ -29,9 +32,12 @@ import java.util.UUID;
 @Transactional(readOnly = true)
 public class AdminShopProductController {
     private final AdminShopProductControllerService adminShopProductControllerService;
+    private final AdminShopProductTranslationService adminShopProductTranslationService;
 
-    public AdminShopProductController(AdminShopProductControllerService adminShopProductControllerService) {
+    public AdminShopProductController(AdminShopProductControllerService adminShopProductControllerService,
+                                      AdminShopProductTranslationService adminShopProductTranslationService) {
         this.adminShopProductControllerService = adminShopProductControllerService;
+        this.adminShopProductTranslationService = adminShopProductTranslationService;
     }
 
     @GetMapping
@@ -50,6 +56,11 @@ public class AdminShopProductController {
         return ResponseEntity.ok(adminShopProductControllerService.createProduct(payload));
     }
 
+    @PostMapping("/translate")
+    public ResponseEntity<AdminTranslateShopProductResponse> translateProduct(@RequestBody AdminTranslateShopProductRequest payload) {
+        return ResponseEntity.ok(adminShopProductTranslationService.translateProduct(payload));
+    }
+
     @PutMapping("/{productId}")
     @Transactional
     public ResponseEntity<AdminShopProductDto> updateProduct(@PathVariable UUID productId,

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

@@ -0,0 +1,89 @@
+package com.printcalculator.dto;
+
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+public class AdminTranslateShopProductRequest {
+    private UUID categoryId;
+    private String sourceLanguage;
+    private Boolean overwriteExisting;
+    private List<String> materialCodes;
+    private Map<String, String> names;
+    private Map<String, String> excerpts;
+    private Map<String, String> descriptions;
+    private Map<String, String> seoTitles;
+    private Map<String, String> seoDescriptions;
+
+    public UUID getCategoryId() {
+        return categoryId;
+    }
+
+    public void setCategoryId(UUID categoryId) {
+        this.categoryId = categoryId;
+    }
+
+    public String getSourceLanguage() {
+        return sourceLanguage;
+    }
+
+    public void setSourceLanguage(String sourceLanguage) {
+        this.sourceLanguage = sourceLanguage;
+    }
+
+    public Boolean getOverwriteExisting() {
+        return overwriteExisting;
+    }
+
+    public void setOverwriteExisting(Boolean overwriteExisting) {
+        this.overwriteExisting = overwriteExisting;
+    }
+
+    public List<String> getMaterialCodes() {
+        return materialCodes;
+    }
+
+    public void setMaterialCodes(List<String> materialCodes) {
+        this.materialCodes = materialCodes;
+    }
+
+    public Map<String, String> getNames() {
+        return names;
+    }
+
+    public void setNames(Map<String, String> names) {
+        this.names = names;
+    }
+
+    public Map<String, String> getExcerpts() {
+        return excerpts;
+    }
+
+    public void setExcerpts(Map<String, String> excerpts) {
+        this.excerpts = excerpts;
+    }
+
+    public Map<String, String> getDescriptions() {
+        return descriptions;
+    }
+
+    public void setDescriptions(Map<String, String> descriptions) {
+        this.descriptions = descriptions;
+    }
+
+    public Map<String, String> getSeoTitles() {
+        return seoTitles;
+    }
+
+    public void setSeoTitles(Map<String, String> seoTitles) {
+        this.seoTitles = seoTitles;
+    }
+
+    public Map<String, String> getSeoDescriptions() {
+        return seoDescriptions;
+    }
+
+    public void setSeoDescriptions(Map<String, String> seoDescriptions) {
+        this.seoDescriptions = seoDescriptions;
+    }
+}

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

@@ -0,0 +1,70 @@
+package com.printcalculator.dto;
+
+import java.util.List;
+import java.util.Map;
+
+public class AdminTranslateShopProductResponse {
+    private String sourceLanguage;
+    private List<String> targetLanguages;
+    private Map<String, String> names;
+    private Map<String, String> excerpts;
+    private Map<String, String> descriptions;
+    private Map<String, String> seoTitles;
+    private Map<String, String> seoDescriptions;
+
+    public String getSourceLanguage() {
+        return sourceLanguage;
+    }
+
+    public void setSourceLanguage(String sourceLanguage) {
+        this.sourceLanguage = sourceLanguage;
+    }
+
+    public List<String> getTargetLanguages() {
+        return targetLanguages;
+    }
+
+    public void setTargetLanguages(List<String> targetLanguages) {
+        this.targetLanguages = targetLanguages;
+    }
+
+    public Map<String, String> getNames() {
+        return names;
+    }
+
+    public void setNames(Map<String, String> names) {
+        this.names = names;
+    }
+
+    public Map<String, String> getExcerpts() {
+        return excerpts;
+    }
+
+    public void setExcerpts(Map<String, String> excerpts) {
+        this.excerpts = excerpts;
+    }
+
+    public Map<String, String> getDescriptions() {
+        return descriptions;
+    }
+
+    public void setDescriptions(Map<String, String> descriptions) {
+        this.descriptions = descriptions;
+    }
+
+    public Map<String, String> getSeoTitles() {
+        return seoTitles;
+    }
+
+    public void setSeoTitles(Map<String, String> seoTitles) {
+        this.seoTitles = seoTitles;
+    }
+
+    public Map<String, String> getSeoDescriptions() {
+        return seoDescriptions;
+    }
+
+    public void setSeoDescriptions(Map<String, String> seoDescriptions) {
+        this.seoDescriptions = seoDescriptions;
+    }
+}

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

@@ -2,6 +2,7 @@ package com.printcalculator.dto;
 
 import java.math.BigDecimal;
 import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 
 public record ShopProductDetailDto(
@@ -25,6 +26,8 @@ public record ShopProductDetailDto(
         List<ShopProductVariantOptionDto> variants,
         PublicMediaUsageDto primaryImage,
         List<PublicMediaUsageDto> images,
-        ShopProductModelDto model3d
+        ShopProductModelDto model3d,
+        String publicPath,
+        Map<String, String> localizedPaths
 ) {
 }

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

@@ -1,6 +1,7 @@
 package com.printcalculator.dto;
 
 import java.math.BigDecimal;
+import java.util.Map;
 import java.util.UUID;
 
 public record ShopProductSummaryDto(
@@ -15,6 +16,8 @@ public record ShopProductSummaryDto(
         BigDecimal priceToChf,
         ShopProductVariantOptionDto defaultVariant,
         PublicMediaUsageDto primaryImage,
-        ShopProductModelDto model3d
+        ShopProductModelDto model3d,
+        String publicPath,
+        Map<String, String> localizedPaths
 ) {
 }

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

@@ -223,10 +223,15 @@ public class OrderEmailListener {
                 order.getCreatedAt().format(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM).withLocale(locale))
         );
         templateData.put("totalCost", currencyFormatter.format(order.getTotalChf()));
+        templateData.put("logoUrl", buildLogoUrl());
         templateData.put("currentYear", Year.now().getValue());
         return templateData;
     }
 
+    private String buildLogoUrl() {
+        return frontendBaseUrl.replaceAll("/+$", "") + "/assets/images/brand-logo-yellow.svg";
+    }
+
     private String applyOrderConfirmationTexts(Map<String, Object> templateData, String language, String orderNumber) {
         return switch (language) {
             case "en" -> {

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

@@ -1,6 +1,7 @@
 package com.printcalculator.repository;
 
 import com.printcalculator.entity.QuoteLineItem;
+import org.springframework.data.jpa.repository.EntityGraph;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.List;
@@ -8,9 +9,16 @@ import java.util.Optional;
 import java.util.UUID;
 
 public interface QuoteLineItemRepository extends JpaRepository<QuoteLineItem, UUID> {
+    @EntityGraph(attributePaths = {"filamentVariant", "shopProduct", "shopProductVariant"})
     List<QuoteLineItem> findByQuoteSessionId(UUID quoteSessionId);
+
+    @EntityGraph(attributePaths = {"filamentVariant", "shopProduct", "shopProductVariant"})
     List<QuoteLineItem> findByQuoteSessionIdOrderByCreatedAtAsc(UUID quoteSessionId);
+
+    @EntityGraph(attributePaths = {"filamentVariant", "shopProduct", "shopProductVariant"})
     Optional<QuoteLineItem> findByIdAndQuoteSession_Id(UUID lineItemId, UUID quoteSessionId);
+
+    @EntityGraph(attributePaths = {"shopProductVariant"})
     Optional<QuoteLineItem> findFirstByQuoteSession_IdAndLineItemTypeAndShopProductVariant_Id(
             UUID quoteSessionId,
             String lineItemType,

backend/src/main/java/com/printcalculator/service/admin/AdminShopProductTranslationService.java

@@ -0,0 +1,685 @@
+package com.printcalculator.service.admin;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.printcalculator.dto.AdminTranslateShopProductRequest;
+import com.printcalculator.dto.AdminTranslateShopProductResponse;
+import com.printcalculator.entity.ShopCategory;
+import com.printcalculator.repository.ShopCategoryRepository;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.safety.Safelist;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+
+@Service
+@Transactional(readOnly = true)
+public class AdminShopProductTranslationService {
+    private static final List<String> SUPPORTED_LANGUAGES = List.of("it", "en", "de", "fr");
+    private static final Safelist PRODUCT_DESCRIPTION_SAFELIST = Safelist.none()
+            .addTags("p", "div", "br", "strong", "b", "em", "i", "u", "ul", "ol", "li", "a")
+            .addAttributes("a", "href")
+            .addProtocols("a", "href", "http", "https", "mailto", "tel");
+    private static final String DEFAULT_SHOP_CONTEXT = """
+            3D fab is a Swiss-based 3D printing shop and technical service.
+            The tone must be practical, clear, technical, and trustworthy.
+            Avoid hype, avoid invented claims, and avoid vague marketing filler.
+            Preserve all brand names, measurements, materials, SKUs, codes, and technical terminology exactly when they should not be translated.
+            When the source field is empty, return an empty string rather than inventing content.
+            For descriptions, preserve safe HTML structure when present and keep output ready for an ecommerce/admin form.
+            For SEO, prefer concise, natural phrases suitable for ecommerce and search snippets.
+            """;
+
+    private final ShopCategoryRepository shopCategoryRepository;
+    private final ObjectMapper objectMapper;
+    private final HttpClient httpClient;
+    private final String apiKey;
+    private final String baseUrl;
+    private final String model;
+    private final Duration timeout;
+    private final String promptCacheKeyPrefix;
+    private final String additionalBusinessContext;
+
+    public AdminShopProductTranslationService(ShopCategoryRepository shopCategoryRepository,
+                                              ObjectMapper objectMapper,
+                                              @Value("${openai.translation.api-key:}") String apiKey,
+                                              @Value("${openai.translation.base-url:https://api.openai.com/v1}") String baseUrl,
+                                              @Value("${openai.translation.model:gpt-5.4}") String model,
+                                              @Value("${openai.translation.timeout-seconds:45}") long timeoutSeconds,
+                                              @Value("${openai.translation.prompt-cache-key-prefix:printcalc-shop-product-translation-v1}") String promptCacheKeyPrefix,
+                                              @Value("${openai.translation.business-context:}") String additionalBusinessContext) {
+        this.shopCategoryRepository = shopCategoryRepository;
+        this.objectMapper = objectMapper;
+        this.apiKey = apiKey != null ? apiKey.trim() : "";
+        this.baseUrl = normalizeBaseUrl(baseUrl);
+        this.model = model != null ? model.trim() : "";
+        this.timeout = Duration.ofSeconds(Math.max(timeoutSeconds, 5));
+        this.promptCacheKeyPrefix = promptCacheKeyPrefix != null && !promptCacheKeyPrefix.isBlank()
+                ? promptCacheKeyPrefix.trim()
+                : "printcalc-shop-product-translation-v1";
+        this.additionalBusinessContext = additionalBusinessContext != null ? additionalBusinessContext.trim() : "";
+        this.httpClient = HttpClient.newBuilder()
+                .connectTimeout(this.timeout)
+                .build();
+    }
+
+    public AdminTranslateShopProductResponse translateProduct(AdminTranslateShopProductRequest payload) {
+        ensureConfigured();
+        NormalizedTranslationRequest normalizedRequest = normalizeRequest(payload);
+        List<String> targetLanguages = resolveTargetLanguages(normalizedRequest);
+        if (targetLanguages.isEmpty()) {
+            return emptyResponse(normalizedRequest.sourceLanguage());
+        }
+
+        CategoryContext categoryContext = loadCategoryContext(normalizedRequest.categoryId());
+        String businessContext = buildBusinessContext(categoryContext, normalizedRequest.materialCodes());
+
+        TranslationBundle generated = callOpenAiFunction(
+                "generate_product_translations",
+                "Generate translated product copy for the requested target languages.",
+                buildInstructions("Generate the first-pass translations.", businessContext),
+                buildGenerationInput(normalizedRequest, targetLanguages, categoryContext),
+                buildTranslationToolSchema(targetLanguages),
+                "generate"
+        );
+
+        TranslationBundle normalizedGenerated = sanitizeBundle(generated, targetLanguages);
+        List<String> validationNotes = buildValidationNotes(normalizedGenerated, targetLanguages);
+
+        TranslationBundle reviewed = callOpenAiFunction(
+                "review_product_translations",
+                "Review and correct translated product copy while preserving meaning, SEO limits, and technical terminology.",
+                buildInstructions("Review and correct the generated translations.", businessContext),
+                buildReviewInput(normalizedRequest, normalizedGenerated, targetLanguages, categoryContext, validationNotes),
+                buildTranslationToolSchema(targetLanguages),
+                "review"
+        );
+
+        TranslationBundle finalBundle = sanitizeBundle(reviewed, targetLanguages);
+        ensureRequiredTranslations(finalBundle, targetLanguages);
+        return toResponse(normalizedRequest.sourceLanguage(), targetLanguages, finalBundle);
+    }
+
+    private void ensureConfigured() {
+        if (apiKey.isBlank() || model.isBlank()) {
+            throw new ResponseStatusException(
+                    HttpStatus.SERVICE_UNAVAILABLE,
+                    "OpenAI translation is not configured on the backend"
+            );
+        }
+    }
+
+    private NormalizedTranslationRequest normalizeRequest(AdminTranslateShopProductRequest payload) {
+        if (payload == null) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Translation payload is required");
+        }
+
+        String sourceLanguage = normalizeLanguage(payload.getSourceLanguage());
+        if (!SUPPORTED_LANGUAGES.contains(sourceLanguage)) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Unsupported source language");
+        }
+
+        Map<String, String> names = normalizeLocalizedMap(payload.getNames(), false);
+        Map<String, String> excerpts = normalizeLocalizedMap(payload.getExcerpts(), false);
+        Map<String, String> descriptions = normalizeLocalizedMap(payload.getDescriptions(), true);
+        Map<String, String> seoTitles = normalizeLocalizedMap(payload.getSeoTitles(), false);
+        Map<String, String> seoDescriptions = normalizeLocalizedMap(payload.getSeoDescriptions(), false);
+
+        if (names.get(sourceLanguage).isBlank()) {
+            throw new ResponseStatusException(
+                    HttpStatus.BAD_REQUEST,
+                    "The active source language must have a product name before translation"
+            );
+        }
+
+        Set<String> materialCodes = new LinkedHashSet<>();
+        if (payload.getMaterialCodes() != null) {
+            for (String materialCode : payload.getMaterialCodes()) {
+                String normalizedCode = normalizeOptional(materialCode);
+                if (normalizedCode != null) {
+                    materialCodes.add(normalizedCode.toUpperCase(Locale.ROOT));
+                }
+            }
+        }
+
+        return new NormalizedTranslationRequest(
+                payload.getCategoryId(),
+                sourceLanguage,
+                Boolean.TRUE.equals(payload.getOverwriteExisting()),
+                List.copyOf(materialCodes),
+                names,
+                excerpts,
+                descriptions,
+                seoTitles,
+                seoDescriptions
+        );
+    }
+
+    private List<String> resolveTargetLanguages(NormalizedTranslationRequest request) {
+        List<String> targetLanguages = new ArrayList<>();
+        for (String language : SUPPORTED_LANGUAGES) {
+            if (language.equals(request.sourceLanguage())) {
+                continue;
+            }
+            if (request.overwriteExisting() || needsTranslation(request, language)) {
+                targetLanguages.add(language);
+            }
+        }
+        return targetLanguages;
+    }
+
+    private boolean needsTranslation(NormalizedTranslationRequest request, String language) {
+        return request.names().get(language).isBlank()
+                || request.excerpts().get(language).isBlank()
+                || normalizeRichTextOptional(request.descriptions().get(language)) == null
+                || request.seoTitles().get(language).isBlank()
+                || request.seoDescriptions().get(language).isBlank();
+    }
+
+    private CategoryContext loadCategoryContext(UUID categoryId) {
+        if (categoryId == null) {
+            return null;
+        }
+        ShopCategory category = shopCategoryRepository.findById(categoryId).orElse(null);
+        if (category == null) {
+            return null;
+        }
+        return new CategoryContext(
+                category.getSlug(),
+                Map.of(
+                        "it", safeValue(category.getNameIt()),
+                        "en", safeValue(category.getNameEn()),
+                        "de", safeValue(category.getNameDe()),
+                        "fr", safeValue(category.getNameFr())
+                ),
+                Map.of(
+                        "it", safeValue(category.getDescriptionIt()),
+                        "en", safeValue(category.getDescriptionEn()),
+                        "de", safeValue(category.getDescriptionDe()),
+                        "fr", safeValue(category.getDescriptionFr())
+                )
+        );
+    }
+
+    private String buildBusinessContext(CategoryContext categoryContext, List<String> materialCodes) {
+        StringBuilder context = new StringBuilder(DEFAULT_SHOP_CONTEXT);
+        if (!additionalBusinessContext.isBlank()) {
+            context.append('\n').append(additionalBusinessContext.trim());
+        }
+        if (categoryContext != null) {
+            context.append("\nCategory slug: ").append(categoryContext.slug());
+            context.append("\nCategory names: ").append(writeJson(categoryContext.names()));
+            if (categoryContext.descriptions().values().stream().anyMatch(value -> !value.isBlank())) {
+                context.append("\nCategory descriptions: ").append(writeJson(categoryContext.descriptions()));
+            }
+        }
+        if (materialCodes != null && !materialCodes.isEmpty()) {
+            context.append("\nMaterial codes present in the product: ").append(String.join(", ", materialCodes));
+        }
+        return context.toString();
+    }
+
+    private String buildInstructions(String task, String businessContext) {
+        return """
+                You are a senior ecommerce localization editor.
+                Task: %s
+                Return only the function call arguments that match the provided schema.
+                Always preserve meaning, HTML safety, and technical precision.
+                Never invent specifications or marketing claims not present in the source.
+                If a source field is empty, return an empty string for that field.
+                General context:
+                %s
+                """.formatted(task, businessContext);
+    }
+
+    private String buildGenerationInput(NormalizedTranslationRequest request,
+                                        List<String> targetLanguages,
+                                        CategoryContext categoryContext) {
+        ObjectNode input = objectMapper.createObjectNode();
+        input.put("sourceLanguage", request.sourceLanguage());
+        input.set("targetLanguages", objectMapper.valueToTree(targetLanguages));
+        input.put("overwriteExisting", request.overwriteExisting());
+        input.set("source", localizedFieldNode(request, request.sourceLanguage()));
+        input.set("existingTranslations", existingTranslationsNode(request, targetLanguages));
+        input.set("materialCodes", objectMapper.valueToTree(request.materialCodes()));
+        if (categoryContext != null) {
+            input.put("categorySlug", categoryContext.slug());
+            input.set("categoryNames", objectMapper.valueToTree(categoryContext.names()));
+        }
+        return writeJson(input);
+    }
+
+    private String buildReviewInput(NormalizedTranslationRequest request,
+                                    TranslationBundle generated,
+                                    List<String> targetLanguages,
+                                    CategoryContext categoryContext,
+                                    List<String> validationNotes) {
+        ObjectNode input = objectMapper.createObjectNode();
+        input.put("sourceLanguage", request.sourceLanguage());
+        input.set("targetLanguages", objectMapper.valueToTree(targetLanguages));
+        input.set("source", localizedFieldNode(request, request.sourceLanguage()));
+        input.set("generatedTranslations", generated.toJsonNode(objectMapper));
+        input.set("validationNotes", objectMapper.valueToTree(validationNotes));
+        input.set("materialCodes", objectMapper.valueToTree(request.materialCodes()));
+        if (categoryContext != null) {
+            input.put("categorySlug", categoryContext.slug());
+            input.set("categoryNames", objectMapper.valueToTree(categoryContext.names()));
+        }
+        return writeJson(input);
+    }
+
+    private ObjectNode localizedFieldNode(NormalizedTranslationRequest request, String language) {
+        ObjectNode node = objectMapper.createObjectNode();
+        node.put("name", request.names().get(language));
+        node.put("excerpt", request.excerpts().get(language));
+        node.put("description", request.descriptions().get(language));
+        node.put("seoTitle", request.seoTitles().get(language));
+        node.put("seoDescription", request.seoDescriptions().get(language));
+        return node;
+    }
+
+    private ObjectNode existingTranslationsNode(NormalizedTranslationRequest request, List<String> targetLanguages) {
+        ObjectNode node = objectMapper.createObjectNode();
+        for (String language : targetLanguages) {
+            node.set(language, localizedFieldNode(request, language));
+        }
+        return node;
+    }
+
+    private ObjectNode buildTranslationToolSchema(List<String> targetLanguages) {
+        ObjectNode root = objectMapper.createObjectNode();
+        root.put("type", "object");
+        root.put("additionalProperties", false);
+
+        ObjectNode properties = root.putObject("properties");
+        ObjectNode translations = properties.putObject("translations");
+        translations.put("type", "object");
+        translations.put("additionalProperties", false);
+
+        ObjectNode translationProperties = translations.putObject("properties");
+        ArrayNode requiredTranslations = translations.putArray("required");
+        for (String language : targetLanguages) {
+            translationProperties.set(language, buildTranslationSchemaForLanguage(language));
+            requiredTranslations.add(language);
+        }
+
+        ArrayNode required = root.putArray("required");
+        required.add("translations");
+        return root;
+    }
+
+    private ObjectNode buildTranslationSchemaForLanguage(String language) {
+        ObjectNode languageSchema = objectMapper.createObjectNode();
+        languageSchema.put("type", "object");
+        languageSchema.put("additionalProperties", false);
+        languageSchema.put("description", "Localized product copy for language " + language);
+
+        ObjectNode properties = languageSchema.putObject("properties");
+        addSchemaString(properties, "name", "Translated product name. Never empty.");
+        addSchemaString(properties, "excerpt", "Short excerpt. Empty string if source excerpt is empty.");
+        addSchemaString(properties, "description", "Product description as safe HTML or empty string if source description is empty.");
+        addSchemaString(properties, "seoTitle", "SEO title. Empty string if source SEO title is empty.");
+        addSchemaString(properties, "seoDescription", "SEO description, ideally under 160 characters. Empty string if source SEO description is empty.");
+
+        ArrayNode required = languageSchema.putArray("required");
+        required.add("name");
+        required.add("excerpt");
+        required.add("description");
+        required.add("seoTitle");
+        required.add("seoDescription");
+        return languageSchema;
+    }
+
+    private void addSchemaString(ObjectNode properties, String name, String description) {
+        ObjectNode property = properties.putObject(name);
+        property.put("type", "string");
+        property.put("description", description);
+    }
+
+    private TranslationBundle callOpenAiFunction(String functionName,
+                                                 String functionDescription,
+                                                 String instructions,
+                                                 String input,
+                                                 ObjectNode parametersSchema,
+                                                 String cacheSuffix) {
+        ObjectNode requestPayload = objectMapper.createObjectNode();
+        requestPayload.put("model", model);
+        requestPayload.put("instructions", instructions);
+        requestPayload.put("input", input);
+        requestPayload.put("tool_choice", "required");
+        requestPayload.put("temperature", 0.2);
+        requestPayload.put("store", false);
+        requestPayload.put("prompt_cache_key", promptCacheKeyPrefix + ":" + cacheSuffix);
+
+        ArrayNode tools = requestPayload.putArray("tools");
+        ObjectNode tool = tools.addObject();
+        tool.put("type", "function");
+        tool.put("name", functionName);
+        tool.put("description", functionDescription);
+        tool.put("strict", true);
+        tool.set("parameters", parametersSchema);
+
+        JsonNode responseNode = postResponsesRequest(requestPayload);
+        JsonNode output = responseNode.path("output");
+        if (output.isArray()) {
+            for (JsonNode item : output) {
+                if ("function_call".equals(item.path("type").asText())) {
+                    String arguments = item.path("arguments").asText("");
+                    if (arguments.isBlank()) {
+                        break;
+                    }
+                    try {
+                        JsonNode argumentsNode = objectMapper.readTree(arguments);
+                        JsonNode translationsNode = argumentsNode.path("translations");
+                        if (!translationsNode.isObject()) {
+                            throw new ResponseStatusException(
+                                    HttpStatus.BAD_GATEWAY,
+                                    "OpenAI returned a function call without translations"
+                            );
+                        }
+                        return TranslationBundle.fromJson(translationsNode);
+                    } catch (JsonProcessingException exception) {
+                        throw new ResponseStatusException(
+                                HttpStatus.BAD_GATEWAY,
+                                "OpenAI returned invalid JSON arguments",
+                                exception
+                        );
+                    }
+                }
+            }
+        }
+
+        throw new ResponseStatusException(
+                HttpStatus.BAD_GATEWAY,
+                "OpenAI did not return the expected function call"
+        );
+    }
+
+    private JsonNode postResponsesRequest(ObjectNode requestPayload) {
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(baseUrl + "/responses"))
+                .timeout(timeout)
+                .header("Authorization", "Bearer " + apiKey)
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(writeJson(requestPayload)))
+                .build();
+
+        try {
+            HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+            JsonNode body = readJson(response.body());
+            if (response.statusCode() >= 400) {
+                String message = body.path("error").path("message").asText("").trim();
+                throw new ResponseStatusException(
+                        HttpStatus.BAD_GATEWAY,
+                        message.isBlank() ? "OpenAI translation request failed" : message
+                );
+            }
+            return body;
+        } catch (IOException exception) {
+            throw new ResponseStatusException(
+                    HttpStatus.BAD_GATEWAY,
+                    "Unable to read the OpenAI translation response",
+                    exception
+            );
+        } catch (InterruptedException exception) {
+            Thread.currentThread().interrupt();
+            throw new ResponseStatusException(
+                    HttpStatus.BAD_GATEWAY,
+                    "The OpenAI translation request was interrupted",
+                    exception
+            );
+        }
+    }
+
+    private List<String> buildValidationNotes(TranslationBundle bundle, List<String> targetLanguages) {
+        List<String> notes = new ArrayList<>();
+        for (String language : targetLanguages) {
+            if (bundle.names().getOrDefault(language, "").isBlank()) {
+                notes.add(language + ": translated name is empty and must be fixed");
+            }
+            String seoDescription = bundle.seoDescriptions().getOrDefault(language, "");
+            if (seoDescription.length() > 160) {
+                notes.add(language + ": seoDescription exceeds 160 characters and must be shortened");
+            }
+            String description = bundle.descriptions().getOrDefault(language, "");
+            if (!description.isBlank() && normalizeRichTextOptional(description) == null) {
+                notes.add(language + ": description lost meaningful text during sanitization");
+            }
+        }
+        if (notes.isEmpty()) {
+            notes.add("No structural validation issues were found. Review naturalness, terminology, SEO clarity, and consistency.");
+        }
+        return notes;
+    }
+
+    private TranslationBundle sanitizeBundle(TranslationBundle bundle, List<String> targetLanguages) {
+        Map<String, String> names = new LinkedHashMap<>();
+        Map<String, String> excerpts = new LinkedHashMap<>();
+        Map<String, String> descriptions = new LinkedHashMap<>();
+        Map<String, String> seoTitles = new LinkedHashMap<>();
+        Map<String, String> seoDescriptions = new LinkedHashMap<>();
+
+        for (String language : targetLanguages) {
+            names.put(language, safeValue(bundle.names().get(language)));
+            excerpts.put(language, safeValue(bundle.excerpts().get(language)));
+            descriptions.put(language, safeDescription(bundle.descriptions().get(language)));
+            seoTitles.put(language, safeValue(bundle.seoTitles().get(language)));
+            seoDescriptions.put(language, limitSeoDescription(safeValue(bundle.seoDescriptions().get(language))));
+        }
+
+        return new TranslationBundle(names, excerpts, descriptions, seoTitles, seoDescriptions);
+    }
+
+    private void ensureRequiredTranslations(TranslationBundle bundle, List<String> targetLanguages) {
+        for (String language : targetLanguages) {
+            if (bundle.names().getOrDefault(language, "").isBlank()) {
+                throw new ResponseStatusException(
+                        HttpStatus.BAD_GATEWAY,
+                        "OpenAI did not return a valid translated name for " + language.toUpperCase(Locale.ROOT)
+                );
+            }
+        }
+    }
+
+    private AdminTranslateShopProductResponse toResponse(String sourceLanguage,
+                                                         List<String> targetLanguages,
+                                                         TranslationBundle bundle) {
+        AdminTranslateShopProductResponse response = new AdminTranslateShopProductResponse();
+        response.setSourceLanguage(sourceLanguage);
+        response.setTargetLanguages(targetLanguages);
+        response.setNames(bundle.names());
+        response.setExcerpts(bundle.excerpts());
+        response.setDescriptions(bundle.descriptions());
+        response.setSeoTitles(bundle.seoTitles());
+        response.setSeoDescriptions(bundle.seoDescriptions());
+        return response;
+    }
+
+    private AdminTranslateShopProductResponse emptyResponse(String sourceLanguage) {
+        AdminTranslateShopProductResponse response = new AdminTranslateShopProductResponse();
+        response.setSourceLanguage(sourceLanguage);
+        response.setTargetLanguages(List.of());
+        response.setNames(Map.of());
+        response.setExcerpts(Map.of());
+        response.setDescriptions(Map.of());
+        response.setSeoTitles(Map.of());
+        response.setSeoDescriptions(Map.of());
+        return response;
+    }
+
+    private Map<String, String> normalizeLocalizedMap(Map<String, String> rawValues, boolean richText) {
+        Map<String, String> normalized = new LinkedHashMap<>();
+        for (String language : SUPPORTED_LANGUAGES) {
+            String value = rawValues != null ? rawValues.get(language) : null;
+            if (richText) {
+                normalized.put(language, normalizeRichTextOptional(value) != null ? normalizeRichTextOptional(value) : "");
+            } else {
+                normalized.put(language, safeValue(value));
+            }
+        }
+        return normalized;
+    }
+
+    private String safeValue(String value) {
+        return value == null ? "" : value.trim();
+    }
+
+    private String safeDescription(String value) {
+        String normalized = normalizeRichTextOptional(value);
+        return normalized != null ? normalized : "";
+    }
+
+    private String limitSeoDescription(String value) {
+        String normalized = safeValue(value);
+        if (normalized.length() <= 160) {
+            return normalized;
+        }
+        int lastSpace = normalized.lastIndexOf(' ', 157);
+        if (lastSpace >= 120) {
+            return normalized.substring(0, lastSpace).trim();
+        }
+        return normalized.substring(0, 160).trim();
+    }
+
+    private String normalizeOptional(String value) {
+        if (value == null) {
+            return null;
+        }
+        String normalized = value.trim();
+        return normalized.isBlank() ? null : normalized;
+    }
+
+    private String normalizeLanguage(String language) {
+        if (language == null) {
+            return "";
+        }
+        String normalized = language.trim().toLowerCase(Locale.ROOT);
+        int separatorIndex = normalized.indexOf('-');
+        if (separatorIndex > 0) {
+            normalized = normalized.substring(0, separatorIndex);
+        }
+        return normalized;
+    }
+
+    private String normalizeRichTextOptional(String value) {
+        String normalized = normalizeOptional(value);
+        if (normalized == null) {
+            return null;
+        }
+
+        String sanitized = Jsoup.clean(
+                normalized,
+                "",
+                PRODUCT_DESCRIPTION_SAFELIST,
+                new Document.OutputSettings().prettyPrint(false)
+        ).trim();
+        if (sanitized.isBlank()) {
+            return null;
+        }
+
+        String plainText = Jsoup.parse(sanitized).text();
+        return plainText != null && !plainText.trim().isEmpty() ? sanitized : null;
+    }
+
+    private String normalizeBaseUrl(String rawBaseUrl) {
+        String normalized = rawBaseUrl != null && !rawBaseUrl.isBlank()
+                ? rawBaseUrl.trim()
+                : "https://api.openai.com/v1";
+        while (normalized.endsWith("/")) {
+            normalized = normalized.substring(0, normalized.length() - 1);
+        }
+        return normalized;
+    }
+
+    private String writeJson(Object value) {
+        try {
+            return objectMapper.writeValueAsString(value);
+        } catch (JsonProcessingException exception) {
+            throw new ResponseStatusException(
+                    HttpStatus.INTERNAL_SERVER_ERROR,
+                    "Unable to serialize translation payload",
+                    exception
+            );
+        }
+    }
+
+    private JsonNode readJson(String rawJson) throws IOException {
+        return objectMapper.readTree(rawJson);
+    }
+
+    private record NormalizedTranslationRequest(UUID categoryId,
+                                                String sourceLanguage,
+                                                boolean overwriteExisting,
+                                                List<String> materialCodes,
+                                                Map<String, String> names,
+                                                Map<String, String> excerpts,
+                                                Map<String, String> descriptions,
+                                                Map<String, String> seoTitles,
+                                                Map<String, String> seoDescriptions) {
+    }
+
+    private record CategoryContext(String slug,
+                                   Map<String, String> names,
+                                   Map<String, String> descriptions) {
+    }
+
+    private record TranslationBundle(Map<String, String> names,
+                                     Map<String, String> excerpts,
+                                     Map<String, String> descriptions,
+                                     Map<String, String> seoTitles,
+                                     Map<String, String> seoDescriptions) {
+        static TranslationBundle fromJson(JsonNode translationsNode) {
+            Map<String, String> names = new LinkedHashMap<>();
+            Map<String, String> excerpts = new LinkedHashMap<>();
+            Map<String, String> descriptions = new LinkedHashMap<>();
+            Map<String, String> seoTitles = new LinkedHashMap<>();
+            Map<String, String> seoDescriptions = new LinkedHashMap<>();
+
+            translationsNode.fieldNames().forEachRemaining(language -> {
+                JsonNode localizedNode = translationsNode.path(language);
+                names.put(language, localizedNode.path("name").asText(""));
+                excerpts.put(language, localizedNode.path("excerpt").asText(""));
+                descriptions.put(language, localizedNode.path("description").asText(""));
+                seoTitles.put(language, localizedNode.path("seoTitle").asText(""));
+                seoDescriptions.put(language, localizedNode.path("seoDescription").asText(""));
+            });
+
+            return new TranslationBundle(names, excerpts, descriptions, seoTitles, seoDescriptions);
+        }
+
+        ObjectNode toJsonNode(ObjectMapper objectMapper) {
+            ObjectNode root = objectMapper.createObjectNode();
+            ObjectNode translations = root.putObject("translations");
+            for (String language : names.keySet()) {
+                ObjectNode languageNode = translations.putObject(language);
+                languageNode.put("name", names.getOrDefault(language, ""));
+                languageNode.put("excerpt", excerpts.getOrDefault(language, ""));
+                languageNode.put("description", descriptions.getOrDefault(language, ""));
+                languageNode.put("seoTitle", seoTitles.getOrDefault(language, ""));
+                languageNode.put("seoDescription", seoDescriptions.getOrDefault(language, ""));
+            }
+            return root;
+        }
+    }
+}

backend/src/main/java/com/printcalculator/service/quote/QuoteSessionItemService.java

@@ -72,10 +72,14 @@ public class QuoteSessionItemService {
             throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Cannot modify a converted session");
         }
 
+        String ext = quoteStorageService.getSafeExtension(file.getOriginalFilename(), "");
+        if (ext.isBlank()) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Unsupported file type. Allowed: stl, 3mf");
+        }
+
         clamAVService.scan(file.getInputStream());
 
         Path sessionStorageDir = quoteStorageService.sessionStorageDir(session.getId());
-        String ext = quoteStorageService.getSafeExtension(file.getOriginalFilename(), "stl");
         String storedFilename = UUID.randomUUID() + "." + ext;
         Path persistentPath = quoteStorageService.resolveSessionPath(sessionStorageDir, storedFilename);
 

backend/src/main/java/com/printcalculator/service/quote/QuoteStorageService.java

@@ -54,7 +54,6 @@ public class QuoteStorageService {
         return switch (ext) {
             case "stl" -> "stl";
             case "3mf" -> "3mf";
-            case "step", "stp" -> "step";
             default -> fallback;
         };
     }

backend/src/main/java/com/printcalculator/service/request/CustomQuoteRequestNotificationService.java

@@ -30,6 +30,9 @@ public class CustomQuoteRequestNotificationService {
     @Value("${app.mail.contact-request.customer.enabled:true}")
     private boolean contactRequestCustomerMailEnabled;
 
+    @Value("${app.frontend.base-url:http://localhost:4200}")
+    private String frontendBaseUrl;
+
     public CustomQuoteRequestNotificationService(EmailNotificationService emailNotificationService,
                                                  ContactRequestLocalizationService localizationService) {
         this.emailNotificationService = emailNotificationService;
@@ -63,6 +66,7 @@ public class CustomQuoteRequestNotificationService {
         templateData.put("phone", safeValue(request.getPhone()));
         templateData.put("message", safeValue(request.getMessage()));
         templateData.put("attachmentsCount", attachmentsCount);
+        templateData.put("logoUrl", buildLogoUrl());
         templateData.put("currentYear", Year.now().getValue());
 
         emailNotificationService.sendEmail(
@@ -101,6 +105,7 @@ public class CustomQuoteRequestNotificationService {
         templateData.put("phone", safeValue(request.getPhone()));
         templateData.put("message", safeValue(request.getMessage()));
         templateData.put("attachmentsCount", attachmentsCount);
+        templateData.put("logoUrl", buildLogoUrl());
         templateData.put("currentYear", Year.now().getValue());
 
         String subject = localizationService.applyCustomerContactRequestTexts(templateData, language, request.getId());
@@ -119,4 +124,11 @@ public class CustomQuoteRequestNotificationService {
         }
         return value;
     }
+
+    private String buildLogoUrl() {
+        String baseUrl = frontendBaseUrl == null || frontendBaseUrl.isBlank()
+                ? "http://localhost:4200"
+                : frontendBaseUrl;
+        return baseUrl.replaceAll("/+$", "") + "/assets/images/brand-logo-yellow.svg";
+    }
 }

backend/src/main/java/com/printcalculator/service/shop/PublicShopCatalogService.java

@@ -399,6 +399,7 @@ public class PublicShopCatalogService {
                                                       Map<String, String> variantColorHexByMaterialAndColor,
                                                       String language) {
         List<PublicMediaUsageDto> images = productMediaBySlug.getOrDefault(productMediaUsageKey(entry.product()), List.of());
+        Map<String, String> localizedPaths = ShopPublicPathSupport.buildLocalizedProductPaths(entry.product());
         return new ShopProductSummaryDto(
                 entry.product().getId(),
                 entry.product().getSlug(),
@@ -415,7 +416,9 @@ public class PublicShopCatalogService {
                 resolvePriceTo(entry.variants()),
                 toVariantDto(entry.defaultVariant(), entry.defaultVariant(), variantColorHexByMaterialAndColor, language),
                 selectPrimaryMedia(images),
-                toProductModelDto(entry)
+                toProductModelDto(entry),
+                localizedPaths.getOrDefault(normalizeLanguage(language), localizedPaths.get("it")),
+                localizedPaths
         );
     }
 
@@ -426,6 +429,7 @@ public class PublicShopCatalogService {
         List<PublicMediaUsageDto> images = productMediaBySlug.getOrDefault(productMediaUsageKey(entry.product()), List.of());
         String localizedSeoTitle = entry.product().getSeoTitleForLanguage(language);
         String localizedSeoDescription = entry.product().getSeoDescriptionForLanguage(language);
+        Map<String, String> localizedPaths = ShopPublicPathSupport.buildLocalizedProductPaths(entry.product());
         return new ShopProductDetailDto(
                 entry.product().getId(),
                 entry.product().getSlug(),
@@ -453,7 +457,9 @@ public class PublicShopCatalogService {
                         .toList(),
                 selectPrimaryMedia(images),
                 images,
-                toProductModelDto(entry)
+                toProductModelDto(entry),
+                localizedPaths.getOrDefault(normalizeLanguage(language), localizedPaths.get("it")),
+                localizedPaths
         );
     }
 
@@ -514,6 +520,22 @@ public class PublicShopCatalogService {
         return raw;
     }
 
+    private String normalizeLanguage(String language) {
+        String normalized = trimToNull(language);
+        if (normalized == null) {
+            return "it";
+        }
+        normalized = normalized.toLowerCase(Locale.ROOT);
+        int separatorIndex = normalized.indexOf('-');
+        if (separatorIndex > 0) {
+            normalized = normalized.substring(0, separatorIndex);
+        }
+        return switch (normalized) {
+            case "en", "de", "fr" -> normalized;
+            default -> "it";
+        };
+    }
+
     private ShopProductModelDto toProductModelDto(ProductEntry entry) {
         if (entry.modelAsset() == null) {
             return null;

backend/src/main/java/com/printcalculator/service/shop/ShopPublicPathSupport.java

@@ -0,0 +1,66 @@
+package com.printcalculator.service.shop;
+
+import com.printcalculator.entity.ShopProduct;
+
+import java.text.Normalizer;
+import java.util.LinkedHashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.UUID;
+
+final class ShopPublicPathSupport {
+    private static final String PRODUCT_ROUTE_PREFIX = "/shop/p/";
+
+    private ShopPublicPathSupport() {
+    }
+
+    static String buildProductPathSegment(ShopProduct product, String language) {
+        String localizedName = product.getNameForLanguage(language);
+        String idPrefix = productIdPrefix(product.getId());
+        String tail = firstNonBlank(slugify(localizedName), slugify(product.getSlug()), "product");
+        return idPrefix.isBlank() ? tail : idPrefix + "-" + tail;
+    }
+
+    static Map<String, String> buildLocalizedProductPaths(ShopProduct product) {
+        Map<String, String> localizedPaths = new LinkedHashMap<>();
+        for (String language : ShopProduct.SUPPORTED_LANGUAGES) {
+            localizedPaths.put(language, "/" + language + PRODUCT_ROUTE_PREFIX + buildProductPathSegment(product, language));
+        }
+        return localizedPaths;
+    }
+
+    static String productIdPrefix(UUID productId) {
+        if (productId == null) {
+            return "";
+        }
+        String raw = productId.toString().trim().toLowerCase(Locale.ROOT);
+        int dashIndex = raw.indexOf('-');
+        if (dashIndex > 0) {
+            return raw.substring(0, dashIndex);
+        }
+        return raw.length() >= 8 ? raw.substring(0, 8) : raw;
+    }
+
+    static String slugify(String rawValue) {
+        String safeValue = rawValue == null ? "" : rawValue;
+        String normalized = Normalizer.normalize(safeValue, Normalizer.Form.NFD)
+                .replaceAll("\\p{M}+", "")
+                .toLowerCase(Locale.ROOT)
+                .replaceAll("[^a-z0-9]+", "-")
+                .replaceAll("^-+|-+$", "")
+                .replaceAll("-{2,}", "-");
+        return normalized;
+    }
+
+    private static String firstNonBlank(String... values) {
+        if (values == null) {
+            return null;
+        }
+        for (String value : values) {
+            if (value != null && !value.isBlank()) {
+                return value;
+            }
+        }
+        return null;
+    }
+}

backend/src/main/java/com/printcalculator/service/shop/ShopSitemapService.java

@@ -11,7 +11,6 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
-import java.text.Normalizer;
 import java.time.Clock;
 import java.time.Duration;
 import java.time.Instant;
@@ -19,7 +18,6 @@ import java.time.OffsetDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.LinkedHashMap;
 import java.util.List;
-import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
@@ -31,6 +29,12 @@ public class ShopSitemapService {
     private static final List<String> SUPPORTED_LANGUAGES = ShopProduct.SUPPORTED_LANGUAGES;
     private static final String DEFAULT_LANGUAGE = "it";
     private static final DateTimeFormatter LASTMOD_FORMATTER = DateTimeFormatter.ISO_OFFSET_DATE_TIME;
+    private static final Map<String, String> HREFLANG_BY_LANGUAGE = Map.of(
+            "it", "it-CH",
+            "en", "en-CH",
+            "de", "de-CH",
+            "fr", "fr-CH"
+    );
 
     private final ShopCategoryRepository shopCategoryRepository;
     private final ShopProductRepository shopProductRepository;
@@ -130,7 +134,7 @@ public class ShopSitemapService {
 
             Map<String, String> hrefByLanguage = new LinkedHashMap<>();
             for (String language : SUPPORTED_LANGUAGES) {
-                String publicSegment = localizedProductPathSegment(product, language);
+                String publicSegment = ShopPublicPathSupport.buildProductPathSegment(product, language);
                 hrefByLanguage.put(language, frontendBaseUrl + "/" + language + "/shop/p/" + pathEncodeSegment(publicSegment));
             }
 
@@ -169,7 +173,7 @@ public class ShopSitemapService {
                 continue;
             }
             xml.append("    <xhtml:link rel=\"alternate\" hreflang=\"")
-                    .append(language)
+                    .append(HREFLANG_BY_LANGUAGE.getOrDefault(language, language))
                     .append("\" href=\"")
                     .append(xmlEscape(href))
                     .append("\" />\n");
@@ -186,48 +190,6 @@ public class ShopSitemapService {
         xml.append("  </url>\n");
     }
 
-    private String localizedProductPathSegment(ShopProduct product, String language) {
-        String localizedName = product.getNameForLanguage(language);
-        String idPrefix = productIdPrefix(product.getId());
-        String tail = firstNonBlank(slugify(localizedName), slugify(product.getSlug()), "product");
-        return idPrefix.isBlank() ? tail : idPrefix + "-" + tail;
-    }
-
-    private String productIdPrefix(UUID productId) {
-        if (productId == null) {
-            return "";
-        }
-        String raw = productId.toString().trim().toLowerCase(Locale.ROOT);
-        int dashIndex = raw.indexOf('-');
-        if (dashIndex > 0) {
-            return raw.substring(0, dashIndex);
-        }
-        return raw.length() >= 8 ? raw.substring(0, 8) : raw;
-    }
-
-    static String slugify(String rawValue) {
-        String safeValue = rawValue == null ? "" : rawValue;
-        String normalized = Normalizer.normalize(safeValue, Normalizer.Form.NFD)
-                .replaceAll("\\p{M}+", "")
-                .toLowerCase(Locale.ROOT)
-                .replaceAll("[^a-z0-9]+", "-")
-                .replaceAll("^-+|-+$", "")
-                .replaceAll("-{2,}", "-");
-        return normalized;
-    }
-
-    private String firstNonBlank(String... values) {
-        if (values == null) {
-            return null;
-        }
-        for (String value : values) {
-            if (value != null && !value.isBlank()) {
-                return value;
-            }
-        }
-        return null;
-    }
-
     private String pathEncodeSegment(String rawSegment) {
         String safeSegment = rawSegment == null ? "" : rawSegment;
         return URLEncoder.encode(safeSegment, StandardCharsets.UTF_8).replace("+", "%20");

backend/src/main/resources/application.properties

@@ -57,6 +57,12 @@ app.mail.contact-request.admin.address=${APP_MAIL_CONTACT_REQUEST_ADMIN_ADDRESS:
 app.mail.contact-request.customer.enabled=${APP_MAIL_CONTACT_REQUEST_CUSTOMER_ENABLED:true}
 app.frontend.base-url=${APP_FRONTEND_BASE_URL:http://localhost:4200}
 app.sitemap.shop.cache-seconds=${APP_SITEMAP_SHOP_CACHE_SECONDS:3600}
+openai.translation.api-key=${OPENAI_API_KEY:}
+openai.translation.base-url=${OPENAI_BASE_URL:https://api.openai.com/v1}
+openai.translation.model=${OPENAI_TRANSLATION_MODEL:gpt-5.4}
+openai.translation.timeout-seconds=${OPENAI_TRANSLATION_TIMEOUT_SECONDS:45}
+openai.translation.prompt-cache-key-prefix=${OPENAI_TRANSLATION_PROMPT_CACHE_KEY_PREFIX:printcalc-shop-product-translation-v1}
+openai.translation.business-context=${OPENAI_TRANSLATION_BUSINESS_CONTEXT:}
 
 # Admin back-office authentication
 admin.password=${ADMIN_PASSWORD}

backend/src/main/resources/templates/email/contact-request-admin.html

@@ -25,6 +25,21 @@
             color: #222222;
         }
 
+        .header {
+            text-align: center;
+            border-bottom: 1px solid #eeeeee;
+            padding-bottom: 20px;
+            margin-bottom: 20px;
+        }
+
+        .brand-logo {
+            display: block;
+            width: 220px;
+            max-width: 220px;
+            height: auto;
+            margin: 0 auto 16px;
+        }
+
         p {
             color: #444444;
             line-height: 1.5;
@@ -63,7 +78,10 @@
 </head>
 <body>
 <div class="container">
+    <div class="header">
+        <img class="brand-logo" th:src="${logoUrl}" src="https://example.com/assets/images/brand-logo-yellow.svg" alt="3D-Fab">
         <h1>Nuova richiesta di contatto</h1>
+    </div>
     <p>E' stata ricevuta una nuova richiesta dal form contatti/su misura.</p>
 
     <table>

backend/src/main/resources/templates/email/contact-request-customer.html

@@ -25,6 +25,21 @@
             color: #222222;
         }
 
+        .header {
+            text-align: center;
+            border-bottom: 1px solid #eeeeee;
+            padding-bottom: 20px;
+            margin-bottom: 20px;
+        }
+
+        .brand-logo {
+            display: block;
+            width: 220px;
+            max-width: 220px;
+            height: auto;
+            margin: 0 auto 16px;
+        }
+
         h2 {
             margin-top: 18px;
             color: #222222;
@@ -69,7 +84,10 @@
 </head>
 <body>
 <div class="container">
+    <div class="header">
+        <img class="brand-logo" th:src="${logoUrl}" src="https://example.com/assets/images/brand-logo-yellow.svg" alt="3D-Fab">
         <h1 th:text="${headlineText}">We received your contact request</h1>
+    </div>
     <p th:text="${greetingText}">Hi customer,</p>
     <p th:text="${introText}">Thank you for contacting us. Our team will reply as soon as possible.</p>
     <p>

backend/src/main/resources/templates/email/order-confirmation.html

@@ -27,8 +27,17 @@
             margin-bottom: 20px;
         }
 
+        .brand-logo {
+            display: block;
+            width: 220px;
+            max-width: 220px;
+            height: auto;
+            margin: 0 auto 16px;
+        }
+
         .header h1 {
             color: #333333;
+            margin: 0;
         }
 
         .content {
@@ -67,6 +76,7 @@
 <body>
 <div class="container">
     <div class="header">
+        <img class="brand-logo" th:src="${logoUrl}" src="https://example.com/assets/images/brand-logo-yellow.svg" alt="3D-Fab">
         <h1 th:text="${headlineText}">Thank you for your order #00000000</h1>
     </div>
 

backend/src/main/resources/templates/email/order-shipped.html

@@ -27,8 +27,17 @@
             margin-bottom: 20px;
         }
 
+        .brand-logo {
+            display: block;
+            width: 220px;
+            max-width: 220px;
+            height: auto;
+            margin: 0 auto 16px;
+        }
+
         .header h1 {
             color: #333333;
+            margin: 0;
         }
 
         .content {
@@ -70,6 +79,7 @@
 <body>
 <div class="container">
     <div class="header">
+        <img class="brand-logo" th:src="${logoUrl}" src="https://example.com/assets/images/brand-logo-yellow.svg" alt="3D-Fab">
         <h1 th:text="${headlineText}">Your order #00000000 has been shipped</h1>
     </div>
 

backend/src/main/resources/templates/email/payment-confirmed.html

@@ -27,8 +27,17 @@
             margin-bottom: 20px;
         }
 
+        .brand-logo {
+            display: block;
+            width: 220px;
+            max-width: 220px;
+            height: auto;
+            margin: 0 auto 16px;
+        }
+
         .header h1 {
             color: #333333;
+            margin: 0;
         }
 
         .content {
@@ -70,6 +79,7 @@
 <body>
 <div class="container">
     <div class="header">
+        <img class="brand-logo" th:src="${logoUrl}" src="https://example.com/assets/images/brand-logo-yellow.svg" alt="3D-Fab">
         <h1 th:text="${headlineText}">Payment confirmed for order #00000000</h1>
     </div>
 

backend/src/main/resources/templates/email/payment-reported.html

@@ -27,8 +27,17 @@
             margin-bottom: 20px;
         }
 
+        .brand-logo {
+            display: block;
+            width: 220px;
+            max-width: 220px;
+            height: auto;
+            margin: 0 auto 16px;
+        }
+
         .header h1 {
             color: #333333;
+            margin: 0;
         }
 
         .content {
@@ -70,6 +79,7 @@
 <body>
 <div class="container">
     <div class="header">
+        <img class="brand-logo" th:src="${logoUrl}" src="https://example.com/assets/images/brand-logo-yellow.svg" alt="3D-Fab">
         <h1 th:text="${headlineText}">Payment reported for order #00000000</h1>
     </div>
 

backend/src/test/java/com/printcalculator/controller/admin/AdminShopProductControllerSecurityTest.java

@@ -0,0 +1,149 @@
+package com.printcalculator.controller.admin;
+
+import com.printcalculator.config.SecurityConfig;
+import com.printcalculator.dto.AdminTranslateShopProductResponse;
+import com.printcalculator.service.admin.AdminShopProductControllerService;
+import com.printcalculator.service.admin.AdminShopProductTranslationService;
+import com.printcalculator.security.AdminLoginThrottleService;
+import com.printcalculator.security.AdminSessionAuthenticationFilter;
+import com.printcalculator.security.AdminSessionService;
+import jakarta.servlet.http.Cookie;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.TransactionDefinition;
+import org.springframework.transaction.support.AbstractPlatformTransactionManager;
+import org.springframework.transaction.support.DefaultTransactionStatus;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.Mockito.when;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@WebMvcTest(controllers = {AdminAuthController.class, AdminShopProductController.class})
+@Import({
+        SecurityConfig.class,
+        AdminSessionAuthenticationFilter.class,
+        AdminSessionService.class,
+        AdminLoginThrottleService.class,
+        AdminShopProductControllerSecurityTest.TransactionTestConfig.class
+})
+@TestPropertySource(properties = {
+        "admin.password=test-admin-password",
+        "admin.session.secret=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+        "admin.session.ttl-minutes=60"
+})
+class AdminShopProductControllerSecurityTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @MockitoBean
+    private AdminShopProductControllerService adminShopProductControllerService;
+
+    @MockitoBean
+    private AdminShopProductTranslationService adminShopProductTranslationService;
+
+    @Test
+    void translateProduct_withoutAdminCookie_shouldReturn401() throws Exception {
+        mockMvc.perform(post("/api/admin/shop/products/translate")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"sourceLanguage\":\"it\",\"names\":{\"it\":\"Supporto cavo\"}}"))
+                .andExpect(status().isUnauthorized());
+    }
+
+    @Test
+    void translateProduct_withAdminCookie_shouldReturnTranslations() throws Exception {
+        AdminTranslateShopProductResponse response = new AdminTranslateShopProductResponse();
+        response.setSourceLanguage("it");
+        response.setTargetLanguages(List.of("en", "de", "fr"));
+        response.setNames(Map.of("en", "Desk cable clip"));
+        response.setExcerpts(Map.of());
+        response.setDescriptions(Map.of());
+        response.setSeoTitles(Map.of());
+        response.setSeoDescriptions(Map.of());
+
+        when(adminShopProductTranslationService.translateProduct(org.mockito.ArgumentMatchers.any()))
+                .thenReturn(response);
+
+        mockMvc.perform(post("/api/admin/shop/products/translate")
+                        .cookie(loginAndExtractCookie())
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("""
+                                {
+                                  "sourceLanguage":"it",
+                                  "overwriteExisting":false,
+                                  "materialCodes":["PLA"],
+                                  "names":{"it":"Supporto cavo"},
+                                  "excerpts":{"it":"Accessorio tecnico"},
+                                  "descriptions":{"it":"<p>Descrizione</p>"},
+                                  "seoTitles":{"it":"SEO IT"},
+                                  "seoDescriptions":{"it":"SEO description IT"}
+                                }
+                                """))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.sourceLanguage").value("it"))
+                .andExpect(jsonPath("$.targetLanguages[0]").value("en"))
+                .andExpect(jsonPath("$.names.en").value("Desk cable clip"));
+    }
+
+    private Cookie loginAndExtractCookie() throws Exception {
+        MvcResult login = mockMvc.perform(post("/api/admin/auth/login")
+                        .with(req -> {
+                            req.setRemoteAddr("10.0.0.44");
+                            return req;
+                        })
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"password\":\"test-admin-password\"}"))
+                .andExpect(status().isOk())
+                .andReturn();
+
+        String setCookie = login.getResponse().getHeader(HttpHeaders.SET_COOKIE);
+        assertNotNull(setCookie);
+        String[] parts = setCookie.split(";", 2);
+        String[] keyValue = parts[0].split("=", 2);
+        return new Cookie(keyValue[0], keyValue.length > 1 ? keyValue[1] : "");
+    }
+
+    @TestConfiguration
+    static class TransactionTestConfig {
+        @Bean
+        PlatformTransactionManager transactionManager() {
+            return new AbstractPlatformTransactionManager() {
+                @Override
+                protected Object doGetTransaction() {
+                    return new Object();
+                }
+
+                @Override
+                protected void doBegin(Object transaction, TransactionDefinition definition) {
+                    // No-op transaction manager for WebMvc security tests.
+                }
+
+                @Override
+                protected void doCommit(DefaultTransactionStatus status) {
+                    // No-op transaction manager for WebMvc security tests.
+                }
+
+                @Override
+                protected void doRollback(DefaultTransactionStatus status) {
+                    // No-op transaction manager for WebMvc security tests.
+                }
+            };
+        }
+    }
+}

backend/src/test/java/com/printcalculator/service/admin/AdminShopProductTranslationServiceTest.java

@@ -0,0 +1,226 @@
+package com.printcalculator.service.admin;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.printcalculator.dto.AdminTranslateShopProductRequest;
+import com.printcalculator.dto.AdminTranslateShopProductResponse;
+import com.printcalculator.repository.ShopCategoryRepository;
+import com.sun.net.httpserver.HttpExchange;
+import com.sun.net.httpserver.HttpServer;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class AdminShopProductTranslationServiceTest {
+
+    @Mock
+    private ShopCategoryRepository shopCategoryRepository;
+
+    private HttpServer server;
+
+    @AfterEach
+    void tearDown() {
+        if (server != null) {
+            server.stop(0);
+        }
+    }
+
+    @Test
+    void translateProduct_shouldCallOpenAiTwiceAndReturnReviewedTranslations() throws Exception {
+        ObjectMapper objectMapper = new ObjectMapper();
+        List<JsonNode> capturedRequests = new CopyOnWriteArrayList<>();
+        AtomicInteger requestCounter = new AtomicInteger();
+        server = HttpServer.create(new InetSocketAddress(0), 0);
+        server.createContext("/v1/responses", exchange -> {
+            capturedRequests.add(readBody(objectMapper, exchange));
+            int currentRequest = requestCounter.incrementAndGet();
+            String functionName = currentRequest == 1
+                    ? "generate_product_translations"
+                    : "review_product_translations";
+            String body = functionResponse(
+                    objectMapper,
+                    functionName,
+                    Map.of(
+                            "en", localized("Desk cable clip", "Technical desk accessory", "<p>Desk cable clip for clean cable routing.</p>", "Desk cable clip | 3D fab", "Technical 3D printed desk cable clip for clean cable routing."),
+                            "de", localized("Schreibtisch-Kabelhalter", "Technisches Schreibtisch-Zubehor", "<p>Kabelhalter fur einen aufgeraumten Schreibtisch.</p>", "Schreibtisch-Kabelhalter | 3D fab", "Technischer 3D-gedruckter Kabelhalter fur einen aufgeraumten Schreibtisch."),
+                            "fr", localized("Support de cable de bureau", "Accessoire technique de bureau", "<p>Support de cable pour un bureau ordonne.</p>", "Support de cable de bureau | 3D fab", "Support de cable de bureau imprime en 3D pour garder un espace ordonne.")
+                    )
+            );
+            writeJsonResponse(exchange, body);
+        });
+        server.start();
+
+        when(shopCategoryRepository.findById(UUID.fromString("00000000-0000-0000-0000-000000000001")))
+                .thenReturn(Optional.empty());
+
+        AdminShopProductTranslationService service = new AdminShopProductTranslationService(
+                shopCategoryRepository,
+                objectMapper,
+                "test-key",
+                "http://127.0.0.1:" + server.getAddress().getPort() + "/v1",
+                "gpt-5.4",
+                20,
+                "test-cache-key",
+                "Use concise ecommerce wording."
+        );
+
+        AdminTranslateShopProductRequest payload = new AdminTranslateShopProductRequest();
+        payload.setCategoryId(UUID.fromString("00000000-0000-0000-0000-000000000001"));
+        payload.setSourceLanguage("it");
+        payload.setOverwriteExisting(false);
+        payload.setMaterialCodes(List.of("pla", "petg"));
+        payload.setNames(Map.of(
+                "it", "Supporto cavo scrivania",
+                "en", "",
+                "de", "",
+                "fr", ""
+        ));
+        payload.setExcerpts(Map.of(
+                "it", "Accessorio tecnico",
+                "en", "",
+                "de", "",
+                "fr", ""
+        ));
+        payload.setDescriptions(Map.of(
+                "it", "<p>Supporto per tenere i cavi ordinati sulla scrivania.</p>",
+                "en", "",
+                "de", "",
+                "fr", ""
+        ));
+        payload.setSeoTitles(Map.of(
+                "it", "Supporto cavo scrivania | 3D fab",
+                "en", "",
+                "de", "",
+                "fr", ""
+        ));
+        payload.setSeoDescriptions(Map.of(
+                "it", "Supporto tecnico stampato in 3D per tenere i cavi in ordine sulla scrivania.",
+                "en", "",
+                "de", "",
+                "fr", ""
+        ));
+
+        AdminTranslateShopProductResponse response = service.translateProduct(payload);
+
+        assertEquals(List.of("en", "de", "fr"), response.getTargetLanguages());
+        assertEquals("Desk cable clip", response.getNames().get("en"));
+        assertTrue(response.getDescriptions().get("en").contains("<p>"));
+        assertEquals(2, capturedRequests.size());
+        assertEquals("required", capturedRequests.get(0).path("tool_choice").asText());
+        assertEquals("test-cache-key:generate", capturedRequests.get(0).path("prompt_cache_key").asText());
+        assertEquals("test-cache-key:review", capturedRequests.get(1).path("prompt_cache_key").asText());
+    }
+
+    @Test
+    void translateProduct_shouldSkipOpenAiWhenNoTargetLanguageNeedsUpdates() {
+        ObjectMapper objectMapper = new ObjectMapper();
+        AdminShopProductTranslationService service = new AdminShopProductTranslationService(
+                shopCategoryRepository,
+                objectMapper,
+                "test-key",
+                "http://127.0.0.1:65535/v1",
+                "gpt-5.4",
+                20,
+                "test-cache-key",
+                ""
+        );
+
+        AdminTranslateShopProductRequest payload = new AdminTranslateShopProductRequest();
+        payload.setSourceLanguage("it");
+        payload.setOverwriteExisting(false);
+        payload.setNames(Map.of(
+                "it", "Supporto cavo scrivania",
+                "en", "Desk cable clip",
+                "de", "Schreibtisch-Kabelhalter",
+                "fr", "Support de cable de bureau"
+        ));
+        payload.setExcerpts(Map.of(
+                "it", "Accessorio tecnico",
+                "en", "Technical desk accessory",
+                "de", "Technisches Schreibtisch-Zubehor",
+                "fr", "Accessoire technique de bureau"
+        ));
+        payload.setDescriptions(Map.of(
+                "it", "<p>Descrizione</p>",
+                "en", "<p>Description</p>",
+                "de", "<p>Beschreibung</p>",
+                "fr", "<p>Description</p>"
+        ));
+        payload.setSeoTitles(Map.of(
+                "it", "SEO IT",
+                "en", "SEO EN",
+                "de", "SEO DE",
+                "fr", "SEO FR"
+        ));
+        payload.setSeoDescriptions(Map.of(
+                "it", "SEO description IT",
+                "en", "SEO description EN",
+                "de", "SEO description DE",
+                "fr", "SEO description FR"
+        ));
+
+        AdminTranslateShopProductResponse response = service.translateProduct(payload);
+        assertTrue(response.getTargetLanguages().isEmpty());
+    }
+
+    private JsonNode readBody(ObjectMapper objectMapper, HttpExchange exchange) throws IOException {
+        return objectMapper.readTree(exchange.getRequestBody());
+    }
+
+    private void writeJsonResponse(HttpExchange exchange, String body) throws IOException {
+        byte[] bytes = body.getBytes(StandardCharsets.UTF_8);
+        exchange.getResponseHeaders().set("Content-Type", "application/json");
+        exchange.sendResponseHeaders(200, bytes.length);
+        try (OutputStream outputStream = exchange.getResponseBody()) {
+            outputStream.write(bytes);
+        }
+    }
+
+    private String functionResponse(ObjectMapper objectMapper,
+                                    String functionName,
+                                    Map<String, Map<String, String>> translations) throws IOException {
+        Map<String, Object> arguments = Map.of("translations", translations);
+        Map<String, Object> item = Map.of(
+                "type", "function_call",
+                "name", functionName,
+                "arguments", objectMapper.writeValueAsString(arguments)
+        );
+        Map<String, Object> response = Map.of(
+                "id", "resp_test",
+                "output", List.of(item)
+        );
+        return objectMapper.writeValueAsString(response);
+    }
+
+    private Map<String, String> localized(String name,
+                                          String excerpt,
+                                          String description,
+                                          String seoTitle,
+                                          String seoDescription) {
+        return Map.of(
+                "name", name,
+                "excerpt", excerpt,
+                "description", description,
+                "seoTitle", seoTitle,
+                "seoDescription", seoDescription
+        );
+    }
+}

backend/src/test/java/com/printcalculator/service/shop/ShopSitemapServiceTest.java

@@ -92,15 +92,15 @@ class ShopSitemapServiceTest {
         assertTrue(xml.contains("<loc>https://3d-fab.ch/en/shop/accessori</loc>"));
         assertTrue(xml.contains("<loc>https://3d-fab.ch/de/shop/accessori</loc>"));
         assertTrue(xml.contains("<loc>https://3d-fab.ch/fr/shop/accessori</loc>"));
-        assertTrue(xml.contains("hreflang=\"en\" href=\"https://3d-fab.ch/en/shop/accessori\""));
+        assertTrue(xml.contains("hreflang=\"en-CH\" href=\"https://3d-fab.ch/en/shop/accessori\""));
         assertFalse(xml.contains("https://3d-fab.ch/it/shop/bozza"));
 
         assertTrue(xml.contains("<loc>https://3d-fab.ch/it/shop/p/123e4567-supporto-bici</loc>"));
         assertTrue(xml.contains("<loc>https://3d-fab.ch/en/shop/p/123e4567-bike-holder</loc>"));
         assertTrue(xml.contains("<loc>https://3d-fab.ch/de/shop/p/123e4567-fahrrad-halter</loc>"));
         assertTrue(xml.contains("<loc>https://3d-fab.ch/fr/shop/p/123e4567-support-velo</loc>"));
-        assertTrue(xml.contains("hreflang=\"en\" href=\"https://3d-fab.ch/en/shop/p/123e4567-bike-holder\""));
+        assertTrue(xml.contains("hreflang=\"en-CH\" href=\"https://3d-fab.ch/en/shop/p/123e4567-bike-holder\""));
-        assertTrue(xml.contains("hreflang=\"de\" href=\"https://3d-fab.ch/de/shop/p/123e4567-fahrrad-halter\""));
+        assertTrue(xml.contains("hreflang=\"de-CH\" href=\"https://3d-fab.ch/de/shop/p/123e4567-fahrrad-halter\""));
         assertTrue(xml.contains("hreflang=\"x-default\" href=\"https://3d-fab.ch/it/shop/p/123e4567-supporto-bici\""));
         assertTrue(xml.contains("<lastmod>2026-03-11T07:30:00Z</lastmod>"));
         assertFalse(xml.contains("33333333-draft"));

docker-compose.deploy.yml

@@ -29,6 +29,12 @@ services:
       - ADMIN_PASSWORD=${ADMIN_PASSWORD}
       - ADMIN_SESSION_SECRET=${ADMIN_SESSION_SECRET}
       - ADMIN_SESSION_TTL_MINUTES=${ADMIN_SESSION_TTL_MINUTES:-480}
+      - OPENAI_API_KEY=${OPENAI_API_KEY:-}
+      - OPENAI_BASE_URL=${OPENAI_BASE_URL:-}
+      - OPENAI_TRANSLATION_MODEL=${OPENAI_TRANSLATION_MODEL:-}
+      - OPENAI_TRANSLATION_TIMEOUT_SECONDS=${OPENAI_TRANSLATION_TIMEOUT_SECONDS:-}
+      - OPENAI_TRANSLATION_PROMPT_CACHE_KEY_PREFIX=${OPENAI_TRANSLATION_PROMPT_CACHE_KEY_PREFIX:-}
+      - OPENAI_TRANSLATION_BUSINESS_CONTEXT=${OPENAI_TRANSLATION_BUSINESS_CONTEXT:-}
       - TEMP_DIR=/app/temp
       - PROFILES_DIR=/app/profiles
       - MEDIA_STORAGE_ROOT=${MEDIA_STORAGE_ROOT:-/app/storage_media}

frontend/public/site.webmanifest

@@ -0,0 +1,23 @@
+{
+  "name": "3D fab",
+  "short_name": "3D fab",
+  "description": "Stampa 3D su misura con preventivo online immediato.",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#ffffff",
+  "icons": [
+    {
+      "src": "/assets/images/Fav-icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/assets/images/Fav-icon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any"
+    }
+  ]
+}

frontend/public/sitemap-static.xml

@@ -2,40 +2,40 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
   <url>
     <loc>https://3d-fab.ch/it</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it" />
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it" />
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it" />
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it" />
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
@@ -43,40 +43,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/calculator/basic</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/basic" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/basic" />
     <changefreq>weekly</changefreq>
     <priority>0.9</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/calculator/basic</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/basic" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/basic" />
     <changefreq>weekly</changefreq>
     <priority>0.9</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/calculator/basic</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/basic" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/basic" />
     <changefreq>weekly</changefreq>
     <priority>0.9</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/calculator/basic</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/basic" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/basic" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/basic" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/basic" />
     <changefreq>weekly</changefreq>
     <priority>0.9</priority>
@@ -84,40 +84,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/calculator/advanced</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/advanced" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/advanced" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/calculator/advanced</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/advanced" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/advanced" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/calculator/advanced</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/advanced" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/advanced" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/calculator/advanced</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/calculator/advanced" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/calculator/advanced" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/calculator/advanced" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/calculator/advanced" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
@@ -125,40 +125,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/shop</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/shop" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/shop" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/shop" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/shop" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/shop" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/shop" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/shop" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/shop" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/shop" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/shop</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/shop" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/shop" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/shop" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/shop" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/shop" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/shop" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/shop" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/shop" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/shop" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/shop</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/shop" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/shop" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/shop" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/shop" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/shop" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/shop" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/shop" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/shop" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/shop" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/shop</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/shop" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/shop" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/shop" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/shop" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/shop" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/shop" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/shop" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/shop" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/shop" />
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
@@ -166,40 +166,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/about</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/about" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/about" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/about" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/about" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/about" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/about" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/about" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/about" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/about" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/about</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/about" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/about" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/about" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/about" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/about" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/about" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/about" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/about" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/about" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/about</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/about" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/about" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/about" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/about" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/about" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/about" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/about" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/about" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/about" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/about</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/about" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/about" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/about" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/about" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/about" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/about" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/about" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/about" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/about" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
@@ -207,40 +207,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/contact</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/contact" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/contact" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/contact" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/contact" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/contact" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/contact" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/contact" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/contact" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/contact" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/contact</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/contact" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/contact" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/contact" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/contact" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/contact" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/contact" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/contact" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/contact" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/contact" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/contact</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/contact" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/contact" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/contact" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/contact" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/contact" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/contact" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/contact" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/contact" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/contact" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/contact</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/contact" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/contact" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/contact" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/contact" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/contact" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/contact" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/contact" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/contact" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/contact" />
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
@@ -248,40 +248,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/privacy</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/privacy" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/privacy" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/privacy" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/privacy" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/privacy" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/privacy" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/privacy" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/privacy" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/privacy" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/privacy</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/privacy" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/privacy" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/privacy" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/privacy" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/privacy" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/privacy" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/privacy" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/privacy" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/privacy" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/privacy</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/privacy" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/privacy" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/privacy" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/privacy" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/privacy" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/privacy" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/privacy" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/privacy" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/privacy" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/privacy</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/privacy" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/privacy" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/privacy" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/privacy" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/privacy" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/privacy" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/privacy" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/privacy" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/privacy" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
@@ -289,40 +289,40 @@
 
   <url>
     <loc>https://3d-fab.ch/it/terms</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/terms" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/terms" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/terms" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/terms" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/terms" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/terms" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/terms" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/terms" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/terms" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/en/terms</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/terms" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/terms" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/terms" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/terms" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/terms" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/terms" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/terms" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/terms" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/terms" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/de/terms</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/terms" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/terms" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/terms" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/terms" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/terms" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/terms" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/terms" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/terms" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/terms" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
   <url>
     <loc>https://3d-fab.ch/fr/terms</loc>
-    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/terms" />
+    <xhtml:link rel="alternate" hreflang="it-CH" href="https://3d-fab.ch/it/terms" />
-    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/terms" />
+    <xhtml:link rel="alternate" hreflang="en-CH" href="https://3d-fab.ch/en/terms" />
-    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/terms" />
+    <xhtml:link rel="alternate" hreflang="de-CH" href="https://3d-fab.ch/de/terms" />
-    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/terms" />
+    <xhtml:link rel="alternate" hreflang="fr-CH" href="https://3d-fab.ch/fr/terms" />
     <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/terms" />
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>

frontend/src/app/app.component.html

@@ -1 +1,14 @@
 <router-outlet></router-outlet>
+
+@if (siteIntroState() !== "hidden") {
+  <div
+    class="site-intro"
+    [class.site-intro--closing]="siteIntroState() === 'closing'"
+    aria-hidden="true"
+  >
+    <app-brand-animation-logo
+      class="site-intro__logo"
+      variant="site-intro"
+    ></app-brand-animation-logo>
+  </div>
+}

frontend/src/app/app.component.scss

@@ -0,0 +1,40 @@
+.site-intro {
+  position: fixed;
+  inset: 0;
+  z-index: 2000;
+  display: grid;
+  place-items: center;
+  background: var(--color-bg);
+  pointer-events: none;
+  opacity: 1;
+  transition: opacity 0.24s ease-out;
+}
+
+.site-intro--closing {
+  opacity: 0;
+}
+
+.site-intro__logo {
+  width: min(calc(100vw - 2rem), 23rem);
+  --brand-animation-width: 23rem;
+  --brand-animation-height: 7.1rem;
+  --brand-animation-letter-width: 3.75rem;
+  --brand-animation-scale: 0.88;
+  --brand-animation-width-mobile: 16.8rem;
+  --brand-animation-height-mobile: 5.3rem;
+  --brand-animation-letter-width-mobile: 2.8rem;
+  --brand-animation-scale-mobile: 0.68;
+  --brand-animation-site-intro-duration: 1.05s;
+  justify-self: center;
+  align-self: center;
+  opacity: 1;
+  transform: scale(1);
+  transition:
+    opacity 0.24s ease-out,
+    transform 0.24s ease-out;
+}
+
+.site-intro--closing .site-intro__logo {
+  opacity: 0;
+  transform: scale(0.985);
+}

frontend/src/app/app.component.ts

@@ -1,14 +1,50 @@
-import { Component, inject } from '@angular/core';
+import {
+  afterNextRender,
+  Component,
+  DestroyRef,
+  Inject,
+  Optional,
+  PLATFORM_ID,
+  inject,
+  signal,
+} from '@angular/core';
+import { isPlatformBrowser } from '@angular/common';
 import { RouterOutlet } from '@angular/router';
 import { SeoService } from './core/services/seo.service';
+import { BrandAnimationLogoComponent } from './shared/components/brand-animation-logo/brand-animation-logo.component';
 
 @Component({
   selector: 'app-root',
   standalone: true,
-  imports: [RouterOutlet],
+  imports: [RouterOutlet, BrandAnimationLogoComponent],
   templateUrl: './app.component.html',
   styleUrl: './app.component.scss',
 })
 export class AppComponent {
   private readonly seoService = inject(SeoService);
+  private readonly destroyRef = inject(DestroyRef);
+  readonly siteIntroState = signal<'hidden' | 'active' | 'closing'>('hidden');
+
+  constructor(@Optional() @Inject(PLATFORM_ID) platformId?: Object) {
+    if (!isPlatformBrowser(platformId ?? 'browser')) {
+      return;
+    }
+
+    afterNextRender(() => {
+      this.siteIntroState.set('active');
+
+      const closeTimeoutId = window.setTimeout(() => {
+        this.siteIntroState.set('closing');
+      }, 1020);
+
+      const hideTimeoutId = window.setTimeout(() => {
+        this.siteIntroState.set('hidden');
+      }, 1280);
+
+      this.destroyRef.onDestroy(() => {
+        window.clearTimeout(closeTimeoutId);
+        window.clearTimeout(hideTimeoutId);
+      });
+    });
+  }
 }

frontend/src/app/app.config.ts

@@ -28,21 +28,12 @@ import {
 import { serverOriginInterceptor } from './core/interceptors/server-origin.interceptor';
 import { catchError, firstValueFrom, of } from 'rxjs';
 import { StaticTranslateLoader } from './core/i18n/static-translate.loader';
-
+import {
-type SupportedLang = 'it' | 'en' | 'de' | 'fr';
+  getNavigatorLanguagePreferences,
-const SUPPORTED_LANGS: readonly SupportedLang[] = ['it', 'en', 'de', 'fr'];
+  parseAcceptLanguage,
-
+  resolveInitialLanguage,
-function resolveLangFromUrl(url: string): SupportedLang {
+  SUPPORTED_LANGS,
-  const firstSegment = (url || '/')
+} from './core/i18n/language-resolution';
-    .split('?')[0]
-    .split('#')[0]
-    .split('/')
-    .filter(Boolean)[0]
-    ?.toLowerCase();
-  return SUPPORTED_LANGS.includes(firstSegment as SupportedLang)
-    ? (firstSegment as SupportedLang)
-    : 'it';
-}
 
 export const appConfig: ApplicationConfig = {
   providers: [
@@ -52,7 +43,7 @@ export const appConfig: ApplicationConfig = {
       withComponentInputBinding(),
       withViewTransitions(),
       withInMemoryScrolling({
-        scrollPositionRestoration: 'top',
+        scrollPositionRestoration: 'enabled',
       }),
     ),
     provideHttpClient(
@@ -60,7 +51,7 @@ export const appConfig: ApplicationConfig = {
     ),
     importProvidersFrom(
       TranslateModule.forRoot({
-        defaultLanguage: 'it',
+        fallbackLang: 'it',
         loader: {
           provide: TranslateLoader,
           useClass: StaticTranslateLoader,
@@ -72,13 +63,21 @@ export const appConfig: ApplicationConfig = {
       const router = inject(Router);
       const request = inject(REQUEST, { optional: true }) as {
         url?: string;
+        headers?: Record<string, string | string[] | undefined>;
       } | null;
 
       translate.addLangs([...SUPPORTED_LANGS]);
-      translate.setDefaultLang('it');
+      translate.setFallbackLang('it');
       const requestedUrl =
         (typeof request?.url === 'string' && request.url) || router.url || '/';
-      const lang = resolveLangFromUrl(requestedUrl);
+      const lang = resolveInitialLanguage({
+        url: requestedUrl,
+        preferredLanguages: request
+          ? parseAcceptLanguage(readRequestHeader(request, 'accept-language'))
+          : getNavigatorLanguagePreferences(
+              typeof navigator === 'undefined' ? null : navigator,
+            ),
+      });
 
       return firstValueFrom(
         translate.use(lang).pipe(
@@ -96,3 +95,21 @@ export const appConfig: ApplicationConfig = {
     provideClientHydration(withEventReplay()),
   ],
 };
+
+function readRequestHeader(
+  request: {
+    headers?: Record<string, string | string[] | undefined>;
+  } | null,
+  headerName: string,
+): string | null {
+  if (!request?.headers) {
+    return null;
+  }
+
+  const headerValue = request.headers[headerName.toLowerCase()];
+  if (Array.isArray(headerValue)) {
+    return headerValue[0] ?? null;
+  }
+
+  return typeof headerValue === 'string' ? headerValue : null;
+}

frontend/src/app/app.routes.ts

@@ -134,6 +134,31 @@ const appChildRoutes: Routes = [
 ];
 
 export const routes: Routes = [
+  {
+    path: ':lang/calculator/animation-test',
+    canMatch: [langPrefixCanMatch],
+    loadComponent: () =>
+      import('./features/calculator/calculator-animation-test.component').then(
+        (m) => m.CalculatorAnimationTestComponent,
+      ),
+    data: {
+      seoTitleKey: 'SEO.ROUTES.CALCULATOR.TITLE',
+      seoDescriptionKey: 'SEO.ROUTES.CALCULATOR.DESCRIPTION',
+      seoRobots: 'noindex, nofollow',
+    },
+  },
+  {
+    path: 'calculator/animation-test',
+    loadComponent: () =>
+      import('./features/calculator/calculator-animation-test.component').then(
+        (m) => m.CalculatorAnimationTestComponent,
+      ),
+    data: {
+      seoTitleKey: 'SEO.ROUTES.CALCULATOR.TITLE',
+      seoDescriptionKey: 'SEO.ROUTES.CALCULATOR.DESCRIPTION',
+      seoRobots: 'noindex, nofollow',
+    },
+  },
   {
     path: ':lang',
     canMatch: [langPrefixCanMatch],

frontend/src/app/core/i18n/language-resolution.ts

@@ -0,0 +1,135 @@
+export type SupportedLang = 'it' | 'en' | 'de' | 'fr';
+
+export const SUPPORTED_LANGS: readonly SupportedLang[] = [
+  'it',
+  'en',
+  'de',
+  'fr',
+];
+
+type InitialLanguageOptions = {
+  url?: string | null;
+  preferredLanguages?: readonly string[] | null;
+  fallbackLang?: SupportedLang;
+};
+
+type NavigatorLike = {
+  language?: string;
+  languages?: readonly string[];
+};
+
+export function resolveInitialLanguage({
+  url,
+  preferredLanguages,
+  fallbackLang = 'it',
+}: InitialLanguageOptions): SupportedLang {
+  const explicitLang = resolveExplicitLanguageFromUrl(url);
+  if (explicitLang) {
+    return explicitLang;
+  }
+
+  for (const candidate of preferredLanguages ?? []) {
+    const normalized = normalizeSupportedLanguage(candidate);
+    if (normalized) {
+      return normalized;
+    }
+  }
+
+  return fallbackLang;
+}
+
+export function parseAcceptLanguage(
+  header: string | null | undefined,
+): string[] {
+  if (!header) {
+    return [];
+  }
+
+  return header
+    .split(',')
+    .map((entry, index) => {
+      const [rawTag, ...params] = entry.split(';').map((part) => part.trim());
+      if (!rawTag) {
+        return null;
+      }
+
+      const qualityParam = params.find((param) => param.startsWith('q='));
+      const quality = qualityParam
+        ? Number.parseFloat(qualityParam.slice(2))
+        : 1;
+      return {
+        tag: rawTag,
+        quality: Number.isFinite(quality) ? quality : 0,
+        index,
+      };
+    })
+    .filter(
+      (
+        entry,
+      ): entry is {
+        tag: string;
+        quality: number;
+        index: number;
+      } => entry !== null && entry.quality > 0,
+    )
+    .sort(
+      (left, right) => right.quality - left.quality || left.index - right.index,
+    )
+    .map((entry) => entry.tag);
+}
+
+export function getNavigatorLanguagePreferences(
+  navigatorLike: NavigatorLike | null | undefined,
+): string[] {
+  if (!navigatorLike) {
+    return [];
+  }
+
+  const orderedLanguages = [
+    ...(Array.isArray(navigatorLike.languages) ? navigatorLike.languages : []),
+  ];
+
+  if (
+    typeof navigatorLike.language === 'string' &&
+    navigatorLike.language &&
+    !orderedLanguages.includes(navigatorLike.language)
+  ) {
+    orderedLanguages.push(navigatorLike.language);
+  }
+
+  return orderedLanguages;
+}
+
+function resolveExplicitLanguageFromUrl(
+  url: string | null | undefined,
+): SupportedLang | null {
+  const normalizedUrl = String(url ?? '/');
+  const [pathAndQuery] = normalizedUrl.split('#', 1);
+  const [rawPath, rawQuery] = pathAndQuery.split('?', 2);
+  const firstSegment = rawPath.split('/').filter(Boolean)[0];
+  const pathLanguage = normalizeSupportedLanguage(firstSegment);
+  if (pathLanguage) {
+    return pathLanguage;
+  }
+
+  const queryLanguage = new URLSearchParams(rawQuery ?? '').get('lang');
+  return normalizeSupportedLanguage(queryLanguage);
+}
+
+function normalizeSupportedLanguage(
+  rawLanguage: string | null | undefined,
+): SupportedLang | null {
+  if (typeof rawLanguage !== 'string') {
+    return null;
+  }
+
+  const normalized = rawLanguage.trim().toLowerCase();
+  if (!normalized || normalized === '*') {
+    return null;
+  }
+
+  const [baseLanguage] = normalized.split('-', 1);
+  return SUPPORTED_LANGS.includes(baseLanguage as SupportedLang)
+    ? (baseLanguage as SupportedLang)
+    : null;
+}

frontend/src/app/core/i18n/static-translate.loader.ts

@@ -1,22 +1,93 @@
-import { Injectable } from '@angular/core';
+import { isPlatformBrowser, isPlatformServer } from '@angular/common';
+import {
+  Injectable,
+  PLATFORM_ID,
+  TransferState,
+  inject,
+  makeStateKey,
+} from '@angular/core';
 import { TranslateLoader, TranslationObject } from '@ngx-translate/core';
-import { Observable, of } from 'rxjs';
+import { from, Observable } from 'rxjs';
-import de from '../../../assets/i18n/de.json';
-import en from '../../../assets/i18n/en.json';
-import fr from '../../../assets/i18n/fr.json';
-import it from '../../../assets/i18n/it.json';
 
-const TRANSLATIONS: Record<string, TranslationObject> = {
+type SupportedLang = 'it' | 'en' | 'de' | 'fr';
-  it: it as TranslationObject,
+
-  en: en as TranslationObject,
+const FALLBACK_LANG: SupportedLang = 'it';
-  de: de as TranslationObject,
+const translationCache = new Map<SupportedLang, Promise<TranslationObject>>();
-  fr: fr as TranslationObject,
+
+const translationLoaders: Record<
+  SupportedLang,
+  () => Promise<TranslationObject>
+> = {
+  it: () =>
+    import('../../../assets/i18n/it.json').then(
+      (module) => module.default as TranslationObject,
+    ),
+  en: () =>
+    import('../../../assets/i18n/en.json').then(
+      (module) => module.default as TranslationObject,
+    ),
+  de: () =>
+    import('../../../assets/i18n/de.json').then(
+      (module) => module.default as TranslationObject,
+    ),
+  fr: () =>
+    import('../../../assets/i18n/fr.json').then(
+      (module) => module.default as TranslationObject,
+    ),
 };
 
 @Injectable()
 export class StaticTranslateLoader implements TranslateLoader {
+  private readonly platformId = inject(PLATFORM_ID);
+  private readonly transferState = inject(TransferState);
+
   getTranslation(lang: string): Observable<TranslationObject> {
-    const normalized = String(lang || 'it').toLowerCase();
+    const normalized = this.normalizeLanguage(lang);
-    return of(TRANSLATIONS[normalized] ?? TRANSLATIONS['it']);
+    return from(this.loadTranslation(normalized));
+  }
+
+  private normalizeLanguage(lang: string): SupportedLang {
+    const normalized = String(lang || FALLBACK_LANG).toLowerCase();
+    return normalized in translationLoaders
+      ? (normalized as SupportedLang)
+      : FALLBACK_LANG;
+  }
+
+  private loadTranslation(lang: SupportedLang): Promise<TranslationObject> {
+    const transferStateKey = makeStateKey<TranslationObject>(
+      `i18n:${lang.toLowerCase()}`,
+    );
+    if (
+      isPlatformBrowser(this.platformId) &&
+      this.transferState.hasKey(transferStateKey)
+    ) {
+      const transferred = this.transferState.get(transferStateKey, {});
+      this.transferState.remove(transferStateKey);
+      return Promise.resolve(transferred);
+    }
+
+    const cached = translationCache.get(lang);
+    if (cached) {
+      return cached;
+    }
+
+    const pending = translationLoaders[lang]()
+      .then((translation) => {
+        if (
+          isPlatformServer(this.platformId) &&
+          !this.transferState.hasKey(transferStateKey)
+        ) {
+          this.transferState.set(transferStateKey, translation);
+        }
+        return translation;
+      })
+      .catch(() =>
+        lang === FALLBACK_LANG
+          ? Promise.resolve({})
+          : this.loadTranslation(FALLBACK_LANG),
+      );
+
+    translationCache.set(lang, pending);
+    return pending;
   }
 }

frontend/src/app/core/interceptors/server-origin.interceptor.ts

@@ -1,6 +1,9 @@
 import { HttpInterceptorFn } from '@angular/common/http';
 import { inject, REQUEST } from '@angular/core';
-import { RequestLike, resolveRequestOrigin } from '../../../core/request-origin';
+import {
+  RequestLike,
+  resolveRequestOrigin,
+} from '../../../core/request-origin';
 
 function isAbsoluteUrl(url: string): boolean {
   return /^[a-z][a-z\d+\-.]*:/i.test(url) || url.startsWith('//');

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

@@ -1,7 +1,11 @@
 <footer class="footer">
   <div class="container footer-inner">
     <div class="col">
-      <span class="brand">3D fab</span>
+      <img
+        class="brand"
+        src="/assets/images/brand-logo-white.svg"
+        alt="3D Fab"
+      />
       <p class="copyright">&copy; 2026 3D fab.</p>
     </div>
 

frontend/src/app/core/layout/footer.component.scss

@@ -38,9 +38,10 @@
 }
 
 .brand {
-  font-weight: 700;
-  color: white;
   display: block;
+  width: auto;
+  height: 1.85rem;
+  max-width: min(9.25rem, 46vw);
   margin-bottom: var(--space-2);
 }
 .copyright {

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

@@ -1,8 +1,15 @@
 <header class="navbar">
   <div class="container navbar-inner">
-    <a [routerLink]="langService.localizedPath('/')" class="brand"
+    <a [routerLink]="langService.localizedPath('/')" class="brand">
-      >3D <span class="highlight">fab</span></a
+      <img
-    >
+        class="brand-logo"
+        ngSrc="/assets/images/Asset%202.svg"
+        alt="3D Fab"
+        width="380"
+        height="86"
+        priority
+      />
+    </a>
 
     <div
       class="mobile-toggle"

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

@@ -14,13 +14,16 @@
   justify-content: space-between;
 }
 .brand {
-  font-size: 1.25rem;
+  display: inline-flex;
-  font-weight: 700;
+  align-items: center;
-  color: var(--color-text);
   text-decoration: none;
 }
-.highlight {
+
-  color: var(--color-brand);
+.brand-logo {
+  display: block;
+  width: auto;
+  height: 2.1rem;
+  max-width: min(11rem, 40vw);
 }
 
 .nav-links {

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

@@ -1,5 +1,12 @@
-import { CommonModule } from '@angular/common';
+import { CommonModule, NgOptimizedImage } from '@angular/common';
-import { Component, DestroyRef, computed, inject, signal } from '@angular/core';
+import {
+  afterNextRender,
+  Component,
+  DestroyRef,
+  computed,
+  inject,
+  signal,
+} from '@angular/core';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import {
   NavigationStart,
@@ -23,7 +30,13 @@ import {
 @Component({
   selector: 'app-navbar',
   standalone: true,
-  imports: [CommonModule, RouterLink, RouterLinkActive, TranslateModule],
+  imports: [
+    CommonModule,
+    RouterLink,
+    RouterLinkActive,
+    TranslateModule,
+    NgOptimizedImage,
+  ],
   templateUrl: './navbar.component.html',
   styleUrls: ['./navbar.component.scss'],
 })
@@ -58,16 +71,9 @@ export class NavbarComponent {
   ];
 
   constructor(public langService: LanguageService) {
-    if (!this.shopService.cartLoaded()) {
+    afterNextRender(() => {
-      this.shopService
+      this.scheduleCartWarmup();
-        .loadCart()
-        .pipe(takeUntilDestroyed(this.destroyRef))
-        .subscribe({
-          error: () => {
-            this.shopService.cart.set(null);
-          },
     });
-    }
 
     this.router.events
       .pipe(takeUntilDestroyed(this.destroyRef))
@@ -96,6 +102,9 @@ export class NavbarComponent {
   toggleCart(): void {
     this.closeMenu();
     this.isCartOpen.update((open) => !open);
+    if (this.isCartOpen()) {
+      this.loadCartIfNeeded();
+    }
   }
 
   closeCart(): void {
@@ -192,5 +201,44 @@ export class NavbarComponent {
       .subscribe();
   }
 
+  private scheduleCartWarmup(): void {
+    if (typeof window === 'undefined') {
+      this.loadCartIfNeeded();
+      return;
+    }
+
+    const warmup = () => this.loadCartIfNeeded();
+    const idleCallback = (
+      window as Window & {
+        requestIdleCallback?: (
+          callback: IdleRequestCallback,
+          options?: IdleRequestOptions,
+        ) => number;
+      }
+    ).requestIdleCallback;
+
+    if (typeof idleCallback === 'function') {
+      idleCallback(() => warmup(), { timeout: 1500 });
+      return;
+    }
+
+    window.setTimeout(warmup, 300);
+  }
+
+  private loadCartIfNeeded(): void {
+    if (this.shopService.cartLoaded() || this.shopService.cartLoading()) {
+      return;
+    }
+
+    this.shopService
+      .loadCart()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        error: () => {
+          this.shopService.cart.set(null);
+        },
+      });
+  }
+
   protected readonly routes = routes;
 }

frontend/src/app/core/services/language.service.spec.ts

@@ -1,7 +1,13 @@
 import { Subject } from 'rxjs';
-import { DefaultUrlSerializer, Router, UrlTree } from '@angular/router';
+import {
+  DefaultUrlSerializer,
+  NavigationEnd,
+  Router,
+  UrlTree,
+} from '@angular/router';
 import { TranslateService } from '@ngx-translate/core';
 import { LanguageService } from './language.service';
+import { RequestLike } from '../../../core/request-origin';
 
 describe('LanguageService', () => {
   function createTranslateMock() {
@@ -9,7 +15,7 @@ describe('LanguageService', () => {
     const translate = {
       currentLang: '',
       addLangs: jasmine.createSpy('addLangs'),
-      setDefaultLang: jasmine.createSpy('setDefaultLang'),
+      setFallbackLang: jasmine.createSpy('setFallbackLang'),
       use: jasmine.createSpy('use').and.callFake((lang: string) => {
         translate.currentLang = lang;
         onLangChange.next({ lang });
@@ -60,7 +66,14 @@ describe('LanguageService', () => {
       parseUrl: (url: string) => serializer.parse(url),
       createUrlTree,
       serializeUrl: (tree: UrlTree) => serializer.serialize(tree),
-      navigateByUrl: jasmine.createSpy('navigateByUrl'),
+      navigateByUrl: jasmine
+        .createSpy('navigateByUrl')
+        .and.callFake((tree: UrlTree) => {
+          const nextUrl = serializer.serialize(tree);
+          router.url = nextUrl;
+          events$.next(new NavigationEnd(1, nextUrl, nextUrl));
+          return Promise.resolve(true);
+        }),
     };
 
     return router as unknown as Router;
@@ -70,11 +83,17 @@ describe('LanguageService', () => {
     const translate = createTranslateMock();
     const router = createRouterMock('/calculator?session=abc');
     const navigateSpy = router.navigateByUrl as unknown as jasmine.Spy;
+    const request: RequestLike = {
+      headers: {
+        'accept-language': 'it-CH,it;q=0.9,en;q=0.8',
+      },
+    };
 
     // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    const service = new LanguageService(translate, router);
+    const service = new LanguageService(translate, router, request);
 
     expect(translate.use).toHaveBeenCalledWith('it');
+    expect((translate as any).setFallbackLang).toHaveBeenCalledWith('it');
     expect(navigateSpy).toHaveBeenCalledTimes(1);
 
     const firstCall = navigateSpy.calls.mostRecent();
@@ -84,6 +103,48 @@ describe('LanguageService', () => {
     expect(navOptions.replaceUrl).toBeTrue();
   });
 
+  it('uses the preferred browser language on the root URL', () => {
+    const translate = createTranslateMock();
+    const router = createRouterMock('/');
+    const navigateSpy = router.navigateByUrl as unknown as jasmine.Spy;
+    const request: RequestLike = {
+      headers: {
+        'accept-language': 'de-CH,de;q=0.9,en;q=0.8,it;q=0.7',
+      },
+    };
+
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    const service = new LanguageService(translate, router, request);
+
+    expect(translate.use).toHaveBeenCalledWith('de');
+    expect(navigateSpy).toHaveBeenCalledTimes(1);
+
+    const firstCall = navigateSpy.calls.mostRecent();
+    const tree = firstCall.args[0] as UrlTree;
+    expect(router.serializeUrl(tree)).toBe('/de');
+  });
+
+  it('uses the default language for non-root URLs without a language prefix', () => {
+    const translate = createTranslateMock();
+    const router = createRouterMock('/calculator?session=abc');
+    const navigateSpy = router.navigateByUrl as unknown as jasmine.Spy;
+    const request: RequestLike = {
+      headers: {
+        'accept-language': 'de-CH,de;q=0.9,en;q=0.8,it;q=0.7',
+      },
+    };
+
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    const service = new LanguageService(translate, router, request);
+
+    expect(translate.use).toHaveBeenCalledWith('de');
+    expect(navigateSpy).toHaveBeenCalledTimes(1);
+
+    const firstCall = navigateSpy.calls.mostRecent();
+    const tree = firstCall.args[0] as UrlTree;
+    expect(router.serializeUrl(tree)).toBe('/it/calculator?session=abc');
+  });
+
   it('switches language while preserving path and query params', () => {
     const translate = createTranslateMock();
     const router = createRouterMock('/it/calculator?session=abc&mode=advanced');
@@ -114,4 +175,23 @@ describe('LanguageService', () => {
       '/de/contact?topic=seo#form',
     );
   });
+
+  it('switches product pages using the resolved localized route overrides', () => {
+    const translate = createTranslateMock();
+    const router = createRouterMock('/it/shop/p/12345678-supporto-cavo');
+    const navigateSpy = router.navigateByUrl as unknown as jasmine.Spy;
+    const service = new LanguageService(translate, router);
+
+    service.setLocalizedRouteOverrides({
+      it: '/it/shop/p/12345678-supporto-cavo',
+      de: '/de/shop/p/12345678-kabelhalter',
+    });
+    navigateSpy.calls.reset();
+
+    service.switchLang('de');
+
+    const call = navigateSpy.calls.mostRecent();
+    const tree = call.args[0] as UrlTree;
+    expect(router.serializeUrl(tree)).toBe('/de/shop/p/12345678-kabelhalter');
+  });
 });

frontend/src/app/core/services/language.service.ts

@@ -1,4 +1,4 @@
-import { Injectable, signal } from '@angular/core';
+import { Inject, Injectable, Optional, REQUEST, signal } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import {
   NavigationEnd,
@@ -6,25 +6,32 @@ import {
   Router,
   UrlTree,
 } from '@angular/router';
+import {
+  getNavigatorLanguagePreferences,
+  parseAcceptLanguage,
+  resolveInitialLanguage,
+} from '../i18n/language-resolution';
+import { RequestLike } from '../../../core/request-origin';
+
+type SupportedLang = 'it' | 'en' | 'de' | 'fr';
+type LocalizedRouteOverrides = Partial<Record<SupportedLang, string>>;
 
 @Injectable({
   providedIn: 'root',
 })
 export class LanguageService {
-  currentLang = signal<'it' | 'en' | 'de' | 'fr'>('it');
+  currentLang = signal<SupportedLang>('it');
-  private readonly supportedLangs: Array<'it' | 'en' | 'de' | 'fr'> = [
+  private readonly defaultLang: SupportedLang = 'it';
-    'it',
+  private readonly supportedLangs: SupportedLang[] = ['it', 'en', 'de', 'fr'];
-    'en',
+  private localizedRouteOverrides: LocalizedRouteOverrides | null = null;
-    'de',
-    'fr',
-  ];
 
   constructor(
     private translate: TranslateService,
     private router: Router,
+    @Optional() @Inject(REQUEST) private request: RequestLike | null = null,
   ) {
     this.translate.addLangs(this.supportedLangs);
-    this.translate.setDefaultLang('it');
+    this.translate.setFallbackLang('it');
     this.translate.onLangChange.subscribe((event) => {
       const lang =
         typeof event.lang === 'string' ? event.lang.toLowerCase() : null;
@@ -34,13 +41,14 @@ export class LanguageService {
     });
 
     const initialTree = this.router.parseUrl(this.router.url);
-    const initialSegments = this.getPrimarySegments(initialTree);
+    const initialLang = resolveInitialLanguage({
-    const queryLang = this.getQueryLang(initialTree);
+      url: this.router.url,
-    const initialLang = this.isSupportedLang(initialSegments[0])
+      preferredLanguages: this.request
-      ? initialSegments[0]
+        ? parseAcceptLanguage(this.readRequestHeader('accept-language'))
-      : this.isSupportedLang(queryLang)
+        : getNavigatorLanguagePreferences(
-        ? queryLang
+            typeof navigator === 'undefined' ? null : navigator,
-        : 'it';
+          ),
+    });
     this.applyLanguage(initialLang);
     this.ensureLanguageInPath(initialTree);
 
@@ -53,13 +61,21 @@ export class LanguageService {
     });
   }
 
-  switchLang(lang: 'it' | 'en' | 'de' | 'fr') {
+  switchLang(lang: SupportedLang) {
     if (!this.isSupportedLang(lang)) {
       return;
     }
-    this.applyLanguage(lang);
 
     const currentTree = this.router.parseUrl(this.router.url);
+    const localizedRoute = this.resolveLocalizedRouteOverride(
+      currentTree,
+      lang,
+    );
+    if (localizedRoute) {
+      this.navigateToLocalizedRoute(currentTree, localizedRoute);
+      return;
+    }
+
     const segments = this.getPrimarySegments(currentTree);
 
     let targetSegments: string[];
@@ -77,7 +93,7 @@ export class LanguageService {
     this.navigateIfChanged(currentTree, targetSegments);
   }
 
-  selectedLang(): 'it' | 'en' | 'de' | 'fr' {
+  selectedLang(): SupportedLang {
     const activeLang =
       typeof this.translate.currentLang === 'string'
         ? this.translate.currentLang.toLowerCase()
@@ -110,6 +126,16 @@ export class LanguageService {
     return `/${[lang, ...segments].join('/')}${suffix}`;
   }
 
+  setLocalizedRouteOverrides(
+    paths: LocalizedRouteOverrides | null | undefined,
+  ): void {
+    this.localizedRouteOverrides = this.normalizeLocalizedRouteOverrides(paths);
+  }
+
+  clearLocalizedRouteOverrides(): void {
+    this.localizedRouteOverrides = null;
+  }
+
   private ensureLanguageInPath(urlTree: UrlTree): void {
     const segments = this.getPrimarySegments(urlTree);
 
@@ -118,23 +144,26 @@ export class LanguageService {
       return;
     }
 
+    if (segments.length === 0) {
       const queryLang = this.getQueryLang(urlTree);
-    const activeLang = this.isSupportedLang(queryLang)
+      const rootLang = this.isSupportedLang(queryLang)
         ? queryLang
         : this.currentLang();
-    if (activeLang !== this.currentLang()) {
+      if (rootLang !== this.currentLang()) {
-      this.applyLanguage(activeLang);
+        this.applyLanguage(rootLang);
+      }
+      this.navigateIfChanged(urlTree, [rootLang]);
+      return;
     }
-    let targetSegments: string[];
 
-    if (segments.length === 0) {
+    if (this.currentLang() !== this.defaultLang) {
-      targetSegments = [activeLang];
+      this.applyLanguage(this.defaultLang);
-    } else if (this.looksLikeLangToken(segments[0])) {
-      targetSegments = [activeLang, ...segments.slice(1)];
-    } else {
-      targetSegments = [activeLang, ...segments];
     }
 
+    const targetSegments = this.looksLikeLangToken(segments[0])
+      ? [this.defaultLang, ...segments.slice(1)]
+      : [this.defaultLang, ...segments];
+
     this.navigateIfChanged(urlTree, targetSegments);
   }
 
@@ -151,12 +180,23 @@ export class LanguageService {
     return typeof lang === 'string' ? lang.toLowerCase() : null;
   }
 
+  private readRequestHeader(headerName: string): string | null {
+    const headerValue =
+      this.request?.headers?.[headerName.toLowerCase()] ??
+      this.request?.get?.(headerName.toLowerCase());
+    if (Array.isArray(headerValue)) {
+      return headerValue[0] ?? null;
+    }
+
+    return typeof headerValue === 'string' ? headerValue : null;
+  }
+
   private isSupportedLang(
     lang: string | null | undefined,
-  ): lang is 'it' | 'en' | 'de' | 'fr' {
+  ): lang is SupportedLang {
     return (
       typeof lang === 'string' &&
-      this.supportedLangs.includes(lang as 'it' | 'en' | 'de' | 'fr')
+      this.supportedLangs.includes(lang as SupportedLang)
     );
   }
 
@@ -166,7 +206,7 @@ export class LanguageService {
     );
   }
 
-  private applyLanguage(lang: 'it' | 'en' | 'de' | 'fr'): void {
+  private applyLanguage(lang: SupportedLang): void {
     if (this.currentLang() === lang && this.translate.currentLang === lang) {
       return;
     }
@@ -174,6 +214,88 @@ export class LanguageService {
     this.currentLang.set(lang);
   }
 
+  private resolveLocalizedRouteOverride(
+    currentTree: UrlTree,
+    lang: SupportedLang,
+  ): string | null {
+    const overrides = this.localizedRouteOverrides;
+    if (!overrides) {
+      return null;
+    }
+
+    const currentPath = this.getCleanPath(
+      this.router.serializeUrl(currentTree),
+    );
+    const paths = Object.values(overrides)
+      .map((path) => this.normalizeLocalizedRoutePath(path))
+      .filter((path): path is string => !!path);
+    if (!paths.includes(currentPath)) {
+      return null;
+    }
+
+    return this.normalizeLocalizedRoutePath(overrides[lang]);
+  }
+
+  private normalizeLocalizedRouteOverrides(
+    paths: LocalizedRouteOverrides | null | undefined,
+  ): LocalizedRouteOverrides | null {
+    if (!paths) {
+      return null;
+    }
+
+    const normalized = this.supportedLangs.reduce<LocalizedRouteOverrides>(
+      (accumulator, lang) => {
+        const path = this.normalizeLocalizedRoutePath(paths[lang]);
+        if (path) {
+          accumulator[lang] = path;
+        }
+        return accumulator;
+      },
+      {},
+    );
+
+    return Object.keys(normalized).length > 0 ? normalized : null;
+  }
+
+  private normalizeLocalizedRoutePath(
+    path: string | null | undefined,
+  ): string | null {
+    const rawPath = String(path ?? '').trim();
+    if (!rawPath) {
+      return null;
+    }
+    const cleanPath = this.getCleanPath(rawPath);
+    return cleanPath.startsWith('/') ? cleanPath : null;
+  }
+
+  private navigateToLocalizedRoute(
+    currentTree: UrlTree,
+    localizedPath: string,
+  ): void {
+    const { lang: _unusedLang, ...queryParams } = currentTree.queryParams;
+    const targetTree = this.router.createUrlTree(
+      ['/', ...localizedPath.split('/').filter(Boolean)],
+      {
+        queryParams,
+        fragment: currentTree.fragment ?? undefined,
+      },
+    );
+
+    if (
+      this.router.serializeUrl(targetTree) ===
+      this.router.serializeUrl(currentTree)
+    ) {
+      return;
+    }
+
+    this.router.navigateByUrl(targetTree, { replaceUrl: true });
+  }
+
+  private getCleanPath(url: string): string {
+    const path = (url || '/').split('?')[0].split('#')[0];
+    return path || '/';
+  }
+
   private navigateIfChanged(
     currentTree: UrlTree,
     targetSegments: string[],

frontend/src/app/core/services/seo.service.spec.ts

@@ -29,6 +29,7 @@ describe('SeoService', () => {
     data: Record<string, unknown>;
     translations: Record<string, string>;
   }): {
+    service: SeoService;
     meta: jasmine.SpyObj<Meta>;
     title: jasmine.SpyObj<Title>;
   } {
@@ -51,7 +52,7 @@ describe('SeoService', () => {
     // eslint-disable-next-line @typescript-eslint/no-unused-vars
     const service = new SeoService(router, title, meta, translate, document);
 
-    return { meta, title };
+    return { service, meta, title };
   }
 
   beforeEach(() => {
@@ -94,14 +95,14 @@ describe('SeoService', () => {
     }));
 
     expect(alternates).toContain({
-      hreflang: 'en',
+      hreflang: 'en-CH',
       href: `${document.location.origin}/en/privacy`,
     });
     expect(alternates).toContain({
       hreflang: 'x-default',
       href: `${document.location.origin}/it/privacy`,
     });
-    expect(document.documentElement.lang).toBe('it');
+    expect(document.documentElement.lang).toBe('it-CH');
 
     const ogUrlCall = meta.updateTag.calls
       .allArgs()
@@ -109,6 +110,11 @@ describe('SeoService', () => {
     expect(ogUrlCall?.[0].content).toBe(
       `${document.location.origin}/it/privacy`,
     );
+
+    const ogLocaleCall = meta.updateTag.calls
+      .allArgs()
+      .find(([tag]) => tag.property === 'og:locale');
+    expect(ogLocaleCall?.[0].content).toBe('it_CH');
   });
 
   it('resolves translated route metadata for the active language', () => {
@@ -130,6 +136,54 @@ describe('SeoService', () => {
       .allArgs()
       .find(([tag]) => tag.name === 'description');
     expect(descriptionCall?.[0].content).toBe('About description');
-    expect(document.documentElement.lang).toBe('en');
+    expect(document.documentElement.lang).toBe('en-CH');
+  });
+
+  it('applies canonical and hreflang values resolved from localized paths', () => {
+    const { service } = createService({
+      url: '/it/shop/p/12345678-supporto-cavo-scrivania',
+      data: {},
+      translations: {},
+    });
+
+    service.applyResolvedSeo({
+      title: 'Supporto cavo scrivania | 3D fab',
+      description: 'Accessorio tecnico',
+      robots: 'index, follow',
+      ogTitle: 'Supporto cavo scrivania | 3D fab',
+      ogDescription: 'Accessorio tecnico',
+      canonicalPath: '/it/shop/p/12345678-supporto-cavo-scrivania',
+      alternates: {
+        it: '/it/shop/p/12345678-supporto-cavo-scrivania',
+        en: '/en/shop/p/12345678-desk-cable-clip',
+        de: '/de/shop/p/12345678-schreibtisch-kabelhalter',
+      },
+      xDefault: '/it/shop/p/12345678-supporto-cavo-scrivania',
+    });
+
+    const canonical = document.head.querySelector(
+      'link[rel="canonical"]',
+    ) as HTMLLinkElement | null;
+    expect(canonical?.getAttribute('href')).toBe(
+      `${document.location.origin}/it/shop/p/12345678-supporto-cavo-scrivania`,
+    );
+
+    const alternates = Array.from(
+      document.head.querySelectorAll(
+        'link[rel="alternate"][data-seo-managed="true"]',
+      ),
+    ).map((node) => ({
+      hreflang: node.getAttribute('hreflang'),
+      href: node.getAttribute('href'),
+    }));
+
+    expect(alternates).toContain({
+      hreflang: 'de-CH',
+      href: `${document.location.origin}/de/shop/p/12345678-schreibtisch-kabelhalter`,
+    });
+    expect(alternates).toContain({
+      hreflang: 'x-default',
+      href: `${document.location.origin}/it/shop/p/12345678-supporto-cavo-scrivania`,
+    });
   });
 });

frontend/src/app/core/services/seo.service.ts

@@ -17,7 +17,13 @@ export interface PageSeoOverride {
   ogDescriptionKey?: string | null;
 }
 
-type SupportedLang = 'it' | 'en' | 'de' | 'fr';
+export interface ResolvedPageSeo extends PageSeoOverride {
+  canonicalPath: string | null;
+  alternates?: SeoMap | null;
+  xDefault?: string | null;
+}
+
+export type SupportedLang = 'it' | 'en' | 'de' | 'fr';
 type SeoMap = Partial<Record<SupportedLang, string>>;
 type SeoTextDataKey =
   | 'seoTitle'
@@ -51,10 +57,16 @@ export class SeoService {
     this.supportedLangs,
   );
   private readonly ogLocaleByLang: Record<SupportedLang, string> = {
-    it: 'it_IT',
+    it: 'it_CH',
-    en: 'en_US',
+    en: 'en_CH',
-    de: 'de_DE',
+    de: 'de_CH',
-    fr: 'fr_FR',
+    fr: 'fr_CH',
+  };
+  private readonly seoLocaleByLang: Record<SupportedLang, string> = {
+    it: 'it-CH',
+    en: 'en-CH',
+    de: 'de-CH',
+    fr: 'fr-CH',
   };
 
   constructor(
@@ -79,23 +91,10 @@ export class SeoService {
   applyPageSeo(override: PageSeoOverride): void {
     const cleanPath = this.getCleanPath(this.router.url);
     const lang = this.resolveLangFromPath(cleanPath);
-    const title =
+    const { title, description, robots, ogTitle, ogDescription } =
-      this.resolveOverrideSeoText(override.title, override.titleKey) ??
+      this.resolvePageSeoOverride(override, lang);
-      this.defaultTitle(lang);
+    const canonicalPath = this.buildLocalizedPath(cleanPath, lang);
-    const description =
+    const alternates = this.buildAlternatePaths(canonicalPath);
-      this.resolveOverrideSeoText(
-        override.description,
-        override.descriptionKey,
-      ) ?? this.defaultDescription(lang);
-    const robots = this.asString(override.robots) ?? 'index, follow';
-    const ogTitle =
-      this.resolveOverrideSeoText(override.ogTitle, override.ogTitleKey) ??
-      title;
-    const ogDescription =
-      this.resolveOverrideSeoText(
-        override.ogDescription,
-        override.ogDescriptionKey,
-      ) ?? description;
 
     this.applySeoValues(
       title,
@@ -104,6 +103,35 @@ export class SeoService {
       ogTitle,
       ogDescription,
       cleanPath,
+      canonicalPath,
+      alternates,
+      alternates.it ?? canonicalPath,
+      lang,
+    );
+  }
+
+  applyResolvedSeo(override: ResolvedPageSeo): void {
+    const cleanPath = this.getCleanPath(this.router.url);
+    const lang = this.resolveLangFromPath(cleanPath);
+    const { title, description, robots, ogTitle, ogDescription } =
+      this.resolvePageSeoOverride(override, lang);
+    const canonicalPath = this.normalizeSeoPath(override.canonicalPath);
+    const alternates = this.normalizeAlternatePaths(override.alternates);
+    const xDefault =
+      this.normalizeSeoPath(override.xDefault) ??
+      alternates?.it ??
+      canonicalPath;
+
+    this.applySeoValues(
+      title,
+      description,
+      robots,
+      ogTitle,
+      ogDescription,
+      cleanPath,
+      canonicalPath,
+      alternates,
+      xDefault,
       lang,
     );
   }
@@ -122,6 +150,8 @@ export class SeoService {
     const ogTitle = this.resolveSeoText(mergedData, 'ogTitle', lang) ?? title;
     const ogDescription =
       this.resolveSeoText(mergedData, 'ogDescription', lang) ?? description;
+    const canonicalPath = this.buildLocalizedPath(cleanPath, lang);
+    const alternates = this.buildAlternatePaths(canonicalPath);
 
     this.applySeoValues(
       title,
@@ -130,6 +160,9 @@ export class SeoService {
       ogTitle,
       ogDescription,
       cleanPath,
+      canonicalPath,
+      alternates,
+      alternates.it ?? canonicalPath,
       lang,
     );
   }
@@ -141,6 +174,9 @@ export class SeoService {
     ogTitle: string,
     ogDescription: string,
     cleanPath: string,
+    canonicalPath: string | null,
+    alternates: SeoMap | null,
+    xDefaultPath: string | null,
     lang: SupportedLang,
   ): void {
     this.titleService.setTitle(title);
@@ -160,12 +196,13 @@ export class SeoService {
       content: ogDescription,
     });
 
-    const canonicalPath = this.buildLocalizedPath(cleanPath, lang);
+    const ogUrl = this.toAbsoluteUrl(canonicalPath ?? cleanPath);
-    const canonical = `${this.document.location.origin}${canonicalPath}`;
+    this.metaService.updateTag({ property: 'og:url', content: ogUrl });
-    this.metaService.updateTag({ property: 'og:url', content: canonical });
+    this.updateCanonicalTag(
-    this.updateCanonicalTag(canonical);
+      canonicalPath ? this.toAbsoluteUrl(canonicalPath) : null,
+    );
     this.updateOpenGraphLocales(lang);
-    this.updateLangAndAlternates(canonicalPath, lang);
+    this.updateLangAndAlternates(alternates, xDefaultPath, lang);
   }
 
   private getMergedRouteData(
@@ -191,6 +228,43 @@ export class SeoService {
     return this.asString(value) ?? this.resolveTranslation(key);
   }
 
+  private resolvePageSeoOverride(
+    override: PageSeoOverride,
+    lang: SupportedLang,
+  ): {
+    title: string;
+    description: string;
+    robots: string;
+    ogTitle: string;
+    ogDescription: string;
+  } {
+    const title =
+      this.resolveOverrideSeoText(override.title, override.titleKey) ??
+      this.defaultTitle(lang);
+    const description =
+      this.resolveOverrideSeoText(
+        override.description,
+        override.descriptionKey,
+      ) ?? this.defaultDescription(lang);
+    const robots = this.asString(override.robots) ?? 'index, follow';
+    const ogTitle =
+      this.resolveOverrideSeoText(override.ogTitle, override.ogTitleKey) ??
+      title;
+    const ogDescription =
+      this.resolveOverrideSeoText(
+        override.ogDescription,
+        override.ogDescriptionKey,
+      ) ?? description;
+
+    return {
+      title,
+      description,
+      robots,
+      ogTitle,
+      ogDescription,
+    };
+  }
+
   private resolveSeoText(
     routeData: Record<string, unknown>,
     key: SeoTextDataKey,
@@ -275,10 +349,59 @@ export class SeoService {
     return `/${[lang, ...segments].join('/')}`;
   }
 
-  private updateCanonicalTag(url: string): void {
+  private buildAlternatePaths(canonicalPath: string): SeoMap {
+    const suffixSegments = canonicalPath.split('/').filter(Boolean).slice(1);
+    const suffix =
+      suffixSegments.length > 0 ? `/${suffixSegments.join('/')}` : '';
+
+    return this.supportedLangs.reduce<SeoMap>((accumulator, alt) => {
+      accumulator[alt] = `/${alt}${suffix}`;
+      return accumulator;
+    }, {});
+  }
+
+  private normalizeAlternatePaths(
+    paths: SeoMap | null | undefined,
+  ): SeoMap | null {
+    if (!paths) {
+      return null;
+    }
+
+    const normalized = this.supportedLangs.reduce<SeoMap>(
+      (accumulator, lang) => {
+        const path = this.normalizeSeoPath(paths[lang]);
+        if (path) {
+          accumulator[lang] = path;
+        }
+        return accumulator;
+      },
+      {},
+    );
+
+    return Object.keys(normalized).length > 0 ? normalized : null;
+  }
+
+  private normalizeSeoPath(path: string | null | undefined): string | null {
+    const rawPath = String(path ?? '').trim();
+    if (!rawPath) {
+      return null;
+    }
+    const normalized = this.getCleanPath(rawPath);
+    return normalized.startsWith('/') ? normalized : null;
+  }
+
+  private toAbsoluteUrl(path: string): string {
+    return `${this.document.location.origin}${path}`;
+  }
+
+  private updateCanonicalTag(url: string | null): void {
     let link = this.document.head.querySelector(
       'link[rel="canonical"]',
     ) as HTMLLinkElement | null;
+    if (!url) {
+      link?.remove();
+      return;
+    }
     if (!link) {
       link = this.document.createElement('link');
       link.setAttribute('rel', 'canonical');
@@ -308,30 +431,34 @@ export class SeoService {
   }
 
   private updateLangAndAlternates(
-    localizedPath: string,
+    alternates: SeoMap | null,
+    xDefaultPath: string | null,
     lang: SupportedLang,
   ): void {
-    const suffixSegments = localizedPath.split('/').filter(Boolean).slice(1);
+    this.document.documentElement.lang = this.seoLocaleByLang[lang];
-    const suffix =
-      suffixSegments.length > 0 ? `/${suffixSegments.join('/')}` : '';
-
-    this.document.documentElement.lang = lang;
 
     this.document.head
       .querySelectorAll('link[rel="alternate"][data-seo-managed="true"]')
       .forEach((node) => node.remove());
 
+    if (!alternates) {
+      return;
+    }
+
     for (const alt of this.supportedLangs) {
-      this.appendAlternateLink(
+      const path = alternates[alt];
-        alt,
+      if (!path) {
-        `${this.document.location.origin}/${alt}${suffix}`,
+        continue;
-      );
       }
       this.appendAlternateLink(
-      'x-default',
+        this.seoLocaleByLang[alt],
-      `${this.document.location.origin}/it${suffix}`,
+        this.toAbsoluteUrl(path),
       );
     }
+    if (xDefaultPath) {
+      this.appendAlternateLink('x-default', this.toAbsoluteUrl(xDefaultPath));
+    }
+  }
 
   private appendAlternateLink(hreflang: string, href: string): void {
     const link = this.document.createElement('link');

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

@@ -668,9 +668,31 @@
             <div>
               <h3>Contenuti localizzati</h3>
               <p>
-                Nome obbligatorio in tutte le lingue. Descrizioni opzionali.
+                Nome obbligatorio in tutte le lingue. Descrizioni opzionali. La
+                traduzione usa la lingua editor come sorgente e compila il form
+                senza salvare.
               </p>
             </div>
+            <button
+              type="button"
+              class="ui-button ui-button--ghost"
+              (click)="translateProductFromCurrentLanguage()"
+              [disabled]="!canTranslateProductFromCurrentLanguage()"
+            >
+              {{ translatingProduct ? "Traduco..." : "Traduci" }}
+            </button>
+          </div>
+
+          <div class="toggle-row toggle-row--compact">
+            <label class="ui-checkbox">
+              <input
+                type="checkbox"
+                [(ngModel)]="overwriteExistingTranslations"
+                name="productOverwriteExistingTranslations"
+              />
+              <span class="ui-checkbox__mark" aria-hidden="true"></span>
+              <span>Sovrascrivi traduzioni esistenti</span>
+            </label>
           </div>
 
           <div class="ui-language-toolbar">

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

@@ -18,6 +18,8 @@ import {
   AdminShopProductModel,
   AdminShopProductVariant,
   AdminShopService,
+  AdminTranslateShopProductPayload,
+  AdminTranslateShopProductResponse,
   AdminUpsertShopCategoryPayload,
   AdminUpsertShopProductPayload,
   AdminUpsertShopProductVariantPayload,
@@ -174,6 +176,7 @@ export class AdminShopComponent implements OnInit, OnDestroy {
   loading = false;
   detailLoading = false;
   savingProduct = false;
+  translatingProduct = false;
   deletingProduct = false;
   savingCategory = false;
   deletingCategory = false;
@@ -188,6 +191,7 @@ export class AdminShopComponent implements OnInit, OnDestroy {
   productStatusFilter: ProductStatusFilter = 'ALL';
   showCategoryManager = false;
   activeContentLanguage: ShopLanguage = 'it';
+  overwriteExistingTranslations = false;
 
   errorMessage: string | null = null;
   successMessage: string | null = null;
@@ -560,6 +564,52 @@ export class AdminShopComponent implements OnInit, OnDestroy {
     this.categoryForm.slug = this.slugify(source);
   }
 
+  translateProductFromCurrentLanguage(): void {
+    if (this.translatingProduct) {
+      return;
+    }
+
+    this.syncDescriptionFromEditor(this.descriptionEditorElement, true);
+
+    const sourceLanguage = this.activeContentLanguage;
+    if (!this.productForm.names[sourceLanguage].trim()) {
+      this.errorMessage = `Il nome prodotto ${this.languageLabels[sourceLanguage]} e obbligatorio per avviare la traduzione.`;
+      this.successMessage = null;
+      return;
+    }
+
+    const payload = this.buildProductTranslationPayload(sourceLanguage);
+    this.translatingProduct = true;
+    this.errorMessage = null;
+    this.successMessage = null;
+
+    this.adminShopService.translateProduct(payload).subscribe({
+      next: (response) => {
+        this.translatingProduct = false;
+        this.applyProductTranslation(response, payload.overwriteExisting);
+        this.successMessage = response.targetLanguages.length
+          ? `Traduzioni ${response.targetLanguages
+              .map((language) => this.languageLabels[language])
+              .join(' / ')} aggiornate nel form.`
+          : 'Nessun campo da tradurre.';
+      },
+      error: (error) => {
+        this.translatingProduct = false;
+        this.errorMessage = this.extractErrorMessage(
+          error,
+          'Traduzione prodotto non riuscita.',
+        );
+      },
+    });
+  }
+
+  canTranslateProductFromCurrentLanguage(): boolean {
+    return (
+      !this.translatingProduct &&
+      !!this.productForm.names[this.activeContentLanguage].trim()
+    );
+  }
+
   setActiveContentLanguage(language: ShopLanguage): void {
     this.syncDescriptionFromEditor(this.descriptionEditorElement, true);
     this.activeContentLanguage = language;
@@ -1669,6 +1719,98 @@ export class AdminShopComponent implements OnInit, OnDestroy {
     };
   }
 
+  private buildProductTranslationPayload(
+    sourceLanguage: ShopLanguage,
+  ): AdminTranslateShopProductPayload {
+    const materialCodes = Array.from(
+      new Set(
+        this.productForm.materials
+          .map((material) => material.materialCode.trim().toUpperCase())
+          .filter((materialCode) => !!materialCode),
+      ),
+    );
+
+    return {
+      categoryId: this.productForm.categoryId || undefined,
+      sourceLanguage,
+      overwriteExisting: this.overwriteExistingTranslations,
+      materialCodes,
+      names: { ...this.productForm.names },
+      excerpts: { ...this.productForm.excerpts },
+      descriptions: { ...this.productForm.descriptions },
+      seoTitles: { ...this.productForm.seoTitles },
+      seoDescriptions: { ...this.productForm.seoDescriptions },
+    };
+  }
+
+  private applyProductTranslation(
+    response: AdminTranslateShopProductResponse,
+    overwriteExisting: boolean,
+  ): void {
+    for (const language of response.targetLanguages) {
+      this.mergeLocalizedText(
+        this.productForm.names,
+        response.names,
+        language,
+        overwriteExisting,
+      );
+      this.mergeLocalizedText(
+        this.productForm.excerpts,
+        response.excerpts,
+        language,
+        overwriteExisting,
+      );
+      this.mergeLocalizedText(
+        this.productForm.descriptions,
+        response.descriptions,
+        language,
+        overwriteExisting,
+        true,
+      );
+      this.mergeLocalizedText(
+        this.productForm.seoTitles,
+        response.seoTitles,
+        language,
+        overwriteExisting,
+      );
+      this.mergeLocalizedText(
+        this.productForm.seoDescriptions,
+        response.seoDescriptions,
+        language,
+        overwriteExisting,
+      );
+    }
+
+    this.renderActiveDescriptionInEditor();
+  }
+
+  private mergeLocalizedText(
+    target: Record<ShopLanguage, string>,
+    translated:
+      | Partial<Record<ShopLanguage, string>>
+      | Record<ShopLanguage, string>
+      | undefined,
+    language: ShopLanguage,
+    overwriteExisting: boolean,
+    richText = false,
+  ): void {
+    const incoming = translated?.[language];
+    if (incoming === undefined) {
+      return;
+    }
+
+    const hasCurrentValue = richText
+      ? this.hasMeaningfulRichText(target[language] ?? '')
+      : !!target[language]?.trim();
+    if (hasCurrentValue && !overwriteExisting) {
+      return;
+    }
+
+    target[language] = richText
+      ? this.normalizeDescriptionForEditor(incoming)
+      : incoming.trim();
+  }
+
   private buildVariantsFromMaterials(): AdminUpsertShopProductVariantPayload[] {
     const existingVariantsByKey = new Map(
       (this.selectedProduct?.variants ?? []).map((variant) => [

frontend/src/app/features/admin/services/admin-shop.service.spec.ts

@@ -0,0 +1,93 @@
+import { TestBed } from '@angular/core/testing';
+import {
+  HttpClientTestingModule,
+  HttpTestingController,
+} from '@angular/common/http/testing';
+import {
+  AdminShopService,
+  AdminTranslateShopProductPayload,
+} from './admin-shop.service';
+
+describe('AdminShopService', () => {
+  let service: AdminShopService;
+  let httpMock: HttpTestingController;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientTestingModule],
+      providers: [AdminShopService],
+    });
+
+    service = TestBed.inject(AdminShopService);
+    httpMock = TestBed.inject(HttpTestingController);
+  });
+
+  afterEach(() => {
+    httpMock.verify();
+  });
+
+  it('posts product translation requests with credentials', () => {
+    const payload: AdminTranslateShopProductPayload = {
+      categoryId: 'category-1',
+      sourceLanguage: 'it',
+      overwriteExisting: false,
+      materialCodes: ['PLA', 'PETG'],
+      names: {
+        it: 'Supporto cavo scrivania',
+        en: '',
+        de: '',
+        fr: '',
+      },
+      excerpts: {
+        it: 'Accessorio tecnico',
+        en: '',
+        de: '',
+        fr: '',
+      },
+      descriptions: {
+        it: '<p>Descrizione prodotto</p>',
+        en: '',
+        de: '',
+        fr: '',
+      },
+      seoTitles: {
+        it: 'Supporto cavo scrivania | 3D fab',
+        en: '',
+        de: '',
+        fr: '',
+      },
+      seoDescriptions: {
+        it: 'Supporto tecnico stampato in 3D per scrivania.',
+        en: '',
+        de: '',
+        fr: '',
+      },
+    };
+
+    service.translateProduct(payload).subscribe((response) => {
+      expect(response.targetLanguages).toEqual(['en', 'de', 'fr']);
+      expect(response.names.en).toBe('Desk cable clip');
+    });
+
+    const request = httpMock.expectOne(
+      'http://localhost:8000/api/admin/shop/products/translate',
+    );
+    expect(request.request.method).toBe('POST');
+    expect(request.request.withCredentials).toBeTrue();
+    expect(request.request.body).toEqual(payload);
+
+    request.flush({
+      sourceLanguage: 'it',
+      targetLanguages: ['en', 'de', 'fr'],
+      names: {
+        en: 'Desk cable clip',
+        de: 'Schreibtisch-Kabelhalter',
+        fr: 'Support de cable de bureau',
+      },
+      excerpts: {},
+      descriptions: {},
+      seoTitles: {},
+      seoDescriptions: {},
+    });
+  });
+});

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

@@ -18,6 +18,8 @@ export interface AdminMediaTextTranslation {
   altText: string;
 }
 
+export type AdminShopLanguage = 'it' | 'en' | 'de' | 'fr';
+
 export interface AdminShopCategoryRef {
   id: string;
   slug: string;
@@ -255,6 +257,28 @@ export interface AdminUpsertShopProductPayload {
   variants: AdminUpsertShopProductVariantPayload[];
 }
 
+export interface AdminTranslateShopProductPayload {
+  categoryId?: string;
+  sourceLanguage: AdminShopLanguage;
+  overwriteExisting: boolean;
+  materialCodes: string[];
+  names: Record<AdminShopLanguage, string>;
+  excerpts: Record<AdminShopLanguage, string>;
+  descriptions: Record<AdminShopLanguage, string>;
+  seoTitles: Record<AdminShopLanguage, string>;
+  seoDescriptions: Record<AdminShopLanguage, string>;
+}
+
+export interface AdminTranslateShopProductResponse {
+  sourceLanguage: AdminShopLanguage;
+  targetLanguages: AdminShopLanguage[];
+  names: Partial<Record<AdminShopLanguage, string>>;
+  excerpts: Partial<Record<AdminShopLanguage, string>>;
+  descriptions: Partial<Record<AdminShopLanguage, string>>;
+  seoTitles: Partial<Record<AdminShopLanguage, string>>;
+  seoDescriptions: Partial<Record<AdminShopLanguage, string>>;
+}
+
 @Injectable({
   providedIn: 'root',
 })
@@ -351,6 +375,18 @@ export class AdminShopService {
     });
   }
 
+  translateProduct(
+    payload: AdminTranslateShopProductPayload,
+  ): Observable<AdminTranslateShopProductResponse> {
+    return this.http.post<AdminTranslateShopProductResponse>(
+      `${this.productsBaseUrl}/translate`,
+      payload,
+      {
+        withCredentials: true,
+      },
+    );
+  }
+
   uploadProductModel(
     productId: string,
     file: File,

frontend/src/app/features/calculator/calculator-animation-test.component.html

@@ -0,0 +1,28 @@
+<section class="animation-test-page">
+  <div class="animation-toolbar" role="group" aria-label="Animation variants">
+    <button
+      type="button"
+      class="variant-toggle"
+      [class.active]="variant() === 'site-intro'"
+      (click)="setVariant('site-intro')"
+    >
+      Site intro
+    </button>
+    <button
+      type="button"
+      class="variant-toggle"
+      [class.active]="variant() === 'calculator-loader'"
+      (click)="setVariant('calculator-loader')"
+    >
+      Calculator loader
+    </button>
+  </div>
+
+  <div class="animation-stage" [attr.data-variant]="variant()">
+    <app-brand-animation-logo
+      [variant]="variant()"
+      [decorative]="false"
+      ariaLabel="3D fab animation test"
+    ></app-brand-animation-logo>
+  </div>
+</section>

frontend/src/app/features/calculator/calculator-animation-test.component.scss

@@ -0,0 +1,60 @@
+:host {
+  display: block;
+}
+
+.animation-test-page {
+  min-height: 100vh;
+  display: grid;
+  align-content: center;
+  justify-items: center;
+  gap: 1.5rem;
+  padding: 2rem 1.5rem 3rem;
+  background: #fff;
+}
+
+.animation-toolbar {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.35rem;
+  border: 1px solid rgba(16, 24, 32, 0.12);
+  border-radius: 999px;
+  background: #f7f5ef;
+}
+
+.variant-toggle {
+  min-height: 2.4rem;
+  padding: 0 1rem;
+  border: 0;
+  border-radius: 999px;
+  background: transparent;
+  color: var(--color-text-muted);
+  font: inherit;
+  font-weight: 600;
+  cursor: pointer;
+  transition:
+    background-color 0.18s ease,
+    color 0.18s ease,
+    box-shadow 0.18s ease;
+}
+
+.variant-toggle.active {
+  background: #fff;
+  color: var(--color-text);
+  box-shadow: 0 6px 16px rgba(16, 24, 32, 0.08);
+}
+
+.animation-stage {
+  width: min(100%, 26rem);
+}
+
+@media (max-width: 640px) {
+  .animation-toolbar {
+    flex-wrap: wrap;
+    justify-content: center;
+  }
+
+  .animation-stage {
+    width: min(100%, 19rem);
+  }
+}

frontend/src/app/features/calculator/calculator-animation-test.component.ts

@@ -0,0 +1,21 @@
+import { CommonModule } from '@angular/common';
+import { Component, signal } from '@angular/core';
+import {
+  BrandAnimationLogoComponent,
+  BrandAnimationVariant,
+} from '../../shared/components/brand-animation-logo/brand-animation-logo.component';
+
+@Component({
+  selector: 'app-calculator-animation-test',
+  standalone: true,
+  imports: [CommonModule, BrandAnimationLogoComponent],
+  templateUrl: './calculator-animation-test.component.html',
+  styleUrl: './calculator-animation-test.component.scss',
+})
+export class CalculatorAnimationTestComponent {
+  readonly variant = signal<BrandAnimationVariant>('site-intro');
+
+  setVariant(variant: BrandAnimationVariant): void {
+    this.variant.set(variant);
+  }
+}

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

@@ -57,7 +57,10 @@
       @if (loading()) {
         <app-card class="loading-state">
           <div class="loader-content">
-            <div class="spinner"></div>
+            <app-brand-animation-logo
+              class="loader-logo"
+              variant="calculator-loader"
+            ></app-brand-animation-logo>
             <h3 class="loading-title">
               {{ "CALC.ANALYZING_TITLE" | translate }}
             </h3>

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

@@ -93,7 +93,7 @@
 
 .loader-content {
   text-align: center;
-  max-width: 300px;
+  max-width: 22rem;
   margin: 0 auto;
 
   /* Center content vertically within the stretched card */
@@ -101,12 +101,14 @@
   display: flex;
   flex-direction: column;
   justify-content: center;
+  align-items: center;
+  gap: var(--space-3);
 }
 
 .loading-title {
   font-size: 1.1rem;
   font-weight: 600;
-  margin: var(--space-4) 0 var(--space-2);
+  margin: 0;
   color: var(--color-text);
 }
 
@@ -114,23 +116,21 @@
   font-size: 0.9rem;
   color: var(--color-text-muted);
   line-height: 1.5;
+  margin: 0;
 }
 
-.spinner {
+.loader-logo {
-  border: 3px solid var(--color-neutral-200);
+  display: block;
-  border-left-color: var(--color-brand);
+  width: min(100%, 16rem);
-  border-radius: 50%;
-  width: 48px;
-  height: 48px;
-  animation: spin 1s linear infinite;
   margin: 0 auto;
-}
+  --brand-animation-width: 16rem;
-
+  --brand-animation-height: 4.8rem;
-@keyframes spin {
+  --brand-animation-letter-width: 2.85rem;
-  0% {
+  --brand-animation-scale: 0.84;
-    transform: rotate(0deg);
+  --brand-animation-word-spacing: 0.97;
-  }
+  --brand-animation-width-mobile: 14rem;
-  100% {
+  --brand-animation-height-mobile: 4.1rem;
-    transform: rotate(360deg);
+  --brand-animation-letter-width-mobile: 2.45rem;
-  }
+  --brand-animation-scale-mobile: 0.84;
+  --brand-animation-loader-loop-duration: 2.65s;
 }

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

@@ -17,6 +17,7 @@ import { catchError, map } from 'rxjs/operators';
 import { AppCardComponent } from '../../shared/components/app-card/app-card.component';
 import { AppAlertComponent } from '../../shared/components/app-alert/app-alert.component';
 import { AppButtonComponent } from '../../shared/components/app-button/app-button.component';
+import { BrandAnimationLogoComponent } from '../../shared/components/brand-animation-logo/brand-animation-logo.component';
 import { UploadFormComponent } from './components/upload-form/upload-form.component';
 import { QuoteResultComponent } from './components/quote-result/quote-result.component';
 import {
@@ -48,6 +49,7 @@ type TrackedPrintSettings = {
     AppCardComponent,
     AppAlertComponent,
     AppButtonComponent,
+    BrandAnimationLogoComponent,
     UploadFormComponent,
     QuoteResultComponent,
     SuccessStateComponent,

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

@@ -3,6 +3,18 @@ import { CalculatorPageComponent } from './calculator-page.component';
 
 export const CALCULATOR_ROUTES: Routes = [
   { path: '', redirectTo: 'basic', pathMatch: 'full' },
+  {
+    path: 'animation-test',
+    loadComponent: () =>
+      import('./calculator-animation-test.component').then(
+        (m) => m.CalculatorAnimationTestComponent,
+      ),
+    data: {
+      seoTitleKey: 'SEO.ROUTES.CALCULATOR.TITLE',
+      seoDescriptionKey: 'SEO.ROUTES.CALCULATOR.DESCRIPTION',
+      seoRobots: 'noindex, nofollow',
+    },
+  },
   {
     path: 'basic',
     component: CalculatorPageComponent,

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

@@ -105,9 +105,7 @@
           [href]="languageService.localizedPath('/privacy')"
           target="_blank"
           rel="noopener"
-          >{{
+          >{{ "LEGAL.CONSENT.UPLOAD_NOTICE_LINK" | translate }}</a
-          "LEGAL.CONSENT.UPLOAD_NOTICE_LINK" | translate
-        }}</a
         >.
       </p>
 

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

@@ -127,7 +127,8 @@ export class UploadFormComponent implements OnInit {
   private layerHeightsByNozzle: Record<string, SimpleOption[]> = {};
   private isPatchingSettings = false;
 
-  acceptedFormats = '.stl,.3mf,.step,.stp';
+  acceptedFormats = '.stl,.3mf';
+  private readonly allowedExtensions = ['stl', '3mf'] as const;
 
   constructor() {
     this.form = this.fb.group({
@@ -286,6 +287,13 @@ export class UploadFormComponent implements OnInit {
     return name.endsWith('.stl');
   }
 
+  isSupportedFile(file: File | null): boolean {
+    if (!file) return false;
+
+    const name = file.name.toLowerCase().trim();
+    return this.allowedExtensions.some((ext) => name.endsWith(`.${ext}`));
+  }
+
   canPreviewSelectedFile(): boolean {
     return this.isStlFile(this.getSelectedPreviewFile());
   }
@@ -340,13 +348,19 @@ export class UploadFormComponent implements OnInit {
   onFilesDropped(newFiles: File[]) {
     const MAX_SIZE = 200 * 1024 * 1024;
     const validItems: FormItem[] = [];
-    let hasError = false;
+    let hasInvalidType = false;
+    let hasOversize = false;
 
     const defaults = this.getCurrentGlobalItemDefaults();
 
     for (const file of newFiles) {
+      if (!this.isSupportedFile(file)) {
+        hasInvalidType = true;
+        continue;
+      }
+
       if (file.size > MAX_SIZE) {
-        hasError = true;
+        hasOversize = true;
         continue;
       }
 
@@ -367,7 +381,11 @@ export class UploadFormComponent implements OnInit {
       });
     }
 
-    if (hasError) {
+    if (hasInvalidType) {
+      alert(this.translate.instant('CALC.ERR_INVALID_FILE_TYPE'));
+    }
+
+    if (hasOversize) {
       alert(this.translate.instant('CALC.ERR_FILE_TOO_LARGE'));
     }
 

frontend/src/app/features/calculator/components/user-details/user-details.component.html

@@ -124,17 +124,14 @@
                   [href]="languageService.localizedPath('/terms')"
                   target="_blank"
                   rel="noopener"
-                  >{{
+                  >{{ "LEGAL.CONSENT.TERMS_LINK" | translate }}</a
-                  "LEGAL.CONSENT.TERMS_LINK" | translate
+                >
-                }}</a>
                 {{ "LEGAL.CONSENT.AND" | translate }}
                 <a
                   [href]="languageService.localizedPath('/privacy')"
                   target="_blank"
                   rel="noopener"
-                  >{{
+                  >{{ "LEGAL.CONSENT.PRIVACY_LINK" | translate }}</a
-                  "LEGAL.CONSENT.PRIVACY_LINK" | translate
-                }}</a
                 >.
               </span>
             </label>

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

@@ -208,17 +208,14 @@
                   [href]="languageService.localizedPath('/terms')"
                   target="_blank"
                   rel="noopener"
-                  >{{
+                  >{{ "LEGAL.CONSENT.TERMS_LINK" | translate }}</a
-                  "LEGAL.CONSENT.TERMS_LINK" | translate
+                >
-                }}</a>
                 {{ "LEGAL.CONSENT.AND" | translate }}
                 <a
                   [href]="languageService.localizedPath('/privacy')"
                   target="_blank"
                   rel="noopener"
-                  >{{
+                  >{{ "LEGAL.CONSENT.PRIVACY_LINK" | translate }}</a
-                  "LEGAL.CONSENT.PRIVACY_LINK" | translate
-                }}</a
                 >.
               </span>
             </label>

frontend/src/app/features/contact/components/contact-form/contact-form.component.html

@@ -89,9 +89,7 @@
           [href]="languageService.localizedPath('/privacy')"
           target="_blank"
           rel="noopener"
-          >{{
+          >{{ "LEGAL.CONSENT.UPLOAD_NOTICE_LINK" | translate }}</a
-          "LEGAL.CONSENT.UPLOAD_NOTICE_LINK" | translate
-        }}</a
         >.
       </p>
 
@@ -169,17 +167,14 @@
             [href]="languageService.localizedPath('/terms')"
             target="_blank"
             rel="noopener"
-            >{{
+            >{{ "LEGAL.CONSENT.TERMS_LINK" | translate }}</a
-            "LEGAL.CONSENT.TERMS_LINK" | translate
+          >
-          }}</a>
           {{ "LEGAL.CONSENT.AND" | translate }}
           <a
             [href]="languageService.localizedPath('/privacy')"
             target="_blank"
             rel="noopener"
-            >{{
+            >{{ "LEGAL.CONSENT.PRIVACY_LINK" | translate }}</a
-            "LEGAL.CONSENT.PRIVACY_LINK" | translate
-          }}</a
           >.
         </span>
       </label>

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

@@ -19,23 +19,17 @@
           <app-button
             variant="primary"
             [routerLink]="languageService.localizedPath('/calculator/basic')"
-            >{{
+            >{{ "HOME.BTN_CALCULATE" | translate }}</app-button
-            "HOME.BTN_CALCULATE" | translate
-          }}</app-button
           >
           <app-button
             variant="outline"
             [routerLink]="languageService.localizedPath('/shop')"
-            >{{
+            >{{ "HOME.BTN_SHOP" | translate }}</app-button
-            "HOME.BTN_SHOP" | translate
-          }}</app-button
           >
           <app-button
             variant="text"
             [routerLink]="languageService.localizedPath('/contact')"
-            >{{
+            >{{ "HOME.BTN_CONTACT" | translate }}</app-button
-            "HOME.BTN_CONTACT" | translate
-          }}</app-button
           >
         </div>
       </div>
@@ -182,16 +176,12 @@
           <app-button
             variant="primary"
             [routerLink]="languageService.localizedPath('/shop')"
-            >{{
+            >{{ "HOME.BTN_DISCOVER" | translate }}</app-button
-            "HOME.BTN_DISCOVER" | translate
-          }}</app-button
           >
           <app-button
             variant="outline"
             [routerLink]="languageService.localizedPath('/contact')"
-            >{{
+            >{{ "HOME.BTN_REQ_SOLUTION" | translate }}</app-button
-            "HOME.BTN_REQ_SOLUTION" | translate
-          }}</app-button
           >
         </div>
       </div>
@@ -260,16 +250,12 @@
           <app-button
             variant="primary"
             [routerLink]="languageService.localizedPath('/about')"
-            >{{
+            >{{ "HOME.SEC_ABOUT_TITLE" | translate }}</app-button
-            "HOME.SEC_ABOUT_TITLE" | translate
-          }}</app-button
           >
           <app-button
             variant="outline"
             [routerLink]="languageService.localizedPath('/contact')"
-            >{{
+            >{{ "HOME.BTN_CONTACT" | translate }}</app-button
-            "HOME.BTN_CONTACT" | translate
-          }}</app-button
           >
         </div>
       </div>

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

@@ -56,7 +56,7 @@
   width: min(100%, 340px);
   padding: 1rem 1.1rem;
   border: 1px solid var(--color-border);
-  border-left: 4px solid var(--swiss-red);
+  border-left: 4px solid var(--color-brand);
   border-radius: 12px;
   background: #fff;
   animation: fadeUp 0.85s ease both;

frontend/src/app/features/shop/components/product-card/product-card.component.html

@@ -1,5 +1,10 @@
 <article class="product-card">
-  <a class="media" [routerLink]="productLink()" [state]="navigationState()">
+  <a
+    class="media"
+    [routerLink]="productLink()"
+    [state]="navigationState()"
+    (click)="rememberCatalogScroll()"
+  >
     @if (imageUrl(); as imageUrl) {
       <img
         [src]="imageUrl"
@@ -32,9 +37,12 @@
     </div>
 
     <h3 class="name">
-      <a [routerLink]="productLink()" [state]="navigationState()">{{
+      <a
-        product().name
+        [routerLink]="productLink()"
-      }}</a>
+        [state]="navigationState()"
+        (click)="rememberCatalogScroll()"
+        >{{ product().name }}</a
+      >
     </h3>
 
     <p class="excerpt">
@@ -62,6 +70,7 @@
         <a
           [routerLink]="productLink()"
           [state]="navigationState()"
+          (click)="rememberCatalogScroll()"
           class="view-btn"
           >{{ "SHOP.DETAILS" | translate }}</a
         >

frontend/src/app/features/shop/components/product-card/product-card.component.ts

@@ -74,4 +74,16 @@ export class ProductCardComponent {
       shopReturnUrl: this.router.url,
     };
   }
+
+  rememberCatalogScroll(): void {
+    if (typeof window === 'undefined') {
+      return;
+    }
+
+    const nextState = {
+      ...(history.state ?? {}),
+      shopRestoreScrollY: Math.max(0, Math.round(window.scrollY)),
+    };
+    history.replaceState(nextState, '');
+  }
 }

frontend/src/app/features/shop/product-detail.component.ts

@@ -1,5 +1,7 @@
-import { CommonModule, isPlatformBrowser } from '@angular/common';
+import { CommonModule, Location, isPlatformBrowser } from '@angular/common';
 import {
+  RESPONSE_INIT,
+  afterNextRender,
   Component,
   DestroyRef,
   Injector,
@@ -58,12 +60,14 @@ export class ProductDetailComponent {
     /^#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/;
   private readonly destroyRef = inject(DestroyRef);
   private readonly injector = inject(Injector);
+  private readonly location = inject(Location);
   private readonly router = inject(Router);
   private readonly translate = inject(TranslateService);
   private readonly seoService = inject(SeoService);
   private readonly languageService = inject(LanguageService);
   private readonly shopRouteService = inject(ShopRouteService);
   private readonly isBrowser = isPlatformBrowser(inject(PLATFORM_ID));
+  private readonly responseInit = inject(RESPONSE_INIT, { optional: true });
   readonly shopService = inject(ShopService);
 
   readonly categorySlug = input<string | undefined>();
@@ -193,16 +197,12 @@ export class ProductDetailComponent {
   );
 
   constructor() {
-    if (!this.shopService.cartLoaded()) {
+    afterNextRender(() => {
-      this.shopService
+      this.scheduleCartWarmup();
-        .loadCart()
+    });
-        .pipe(takeUntilDestroyed(this.destroyRef))
+    this.destroyRef.onDestroy(() => {
-        .subscribe({
+      this.languageService.clearLocalizedRouteOverrides();
-          error: () => {
-            this.shopService.cart.set(null);
-          },
     });
-    }
 
     combineLatest([
       toObservable(this.productSlug, { injector: this.injector }),
@@ -221,13 +221,17 @@ export class ProductDetailComponent {
         }),
         switchMap(([productSlug]) => {
           if (!productSlug) {
+            this.languageService.clearLocalizedRouteOverrides();
             this.error.set('SHOP.NOT_FOUND');
+            this.setResponseStatus(404);
+            this.applyFallbackSeo();
             this.loading.set(false);
             return of(null);
           }
 
           return this.shopService.getProductByPublicPath(productSlug).pipe(
             catchError((error) => {
+              this.languageService.clearLocalizedRouteOverrides();
               this.product.set(null);
               this.selectedVariantId.set(null);
               this.setSelectedImageAssetId(null);
@@ -235,6 +239,9 @@ export class ProductDetailComponent {
               this.error.set(
                 error?.status === 404 ? 'SHOP.NOT_FOUND' : 'SHOP.LOAD_ERROR',
               );
+              if (error?.status === 404) {
+                this.setResponseStatus(404);
+              }
               this.applyFallbackSeo();
               return of(null);
             }),
@@ -263,6 +270,7 @@ export class ProductDetailComponent {
             null,
         );
         this.quantity.set(1);
+        this.languageService.setLocalizedRouteOverrides(product.localizedPaths);
         this.syncPublicUrl(product);
         this.applySeo(product);
         this.modelFile.set(null);
@@ -282,6 +290,45 @@ export class ProductDetailComponent {
     );
   }
 
+  private scheduleCartWarmup(): void {
+    if (typeof window === 'undefined') {
+      this.loadCartIfNeeded();
+      return;
+    }
+
+    const warmup = () => this.loadCartIfNeeded();
+    const idleCallback = (
+      window as Window & {
+        requestIdleCallback?: (
+          callback: IdleRequestCallback,
+          options?: IdleRequestOptions,
+        ) => number;
+      }
+    ).requestIdleCallback;
+
+    if (typeof idleCallback === 'function') {
+      idleCallback(() => warmup(), { timeout: 1500 });
+      return;
+    }
+
+    window.setTimeout(warmup, 300);
+  }
+
+  private loadCartIfNeeded(): void {
+    if (this.shopService.cartLoaded() || this.shopService.cartLoading()) {
+      return;
+    }
+
+    this.shopService
+      .loadCart()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        error: () => {
+          this.shopService.cart.set(null);
+        },
+      });
+  }
+
   selectImage(mediaAssetId: string): void {
     this.setSelectedImageAssetId(mediaAssetId);
   }
@@ -366,9 +413,12 @@ export class ProductDetailComponent {
     if (!sessionId) {
       return;
     }
-    this.router.navigate(['/', this.languageService.selectedLang(), 'checkout'], {
+    this.router.navigate(
+      ['/', this.languageService.selectedLang(), 'checkout'],
+      {
         queryParams: { session: sessionId },
-    });
+      },
+    );
   }
 
   priceLabel(): number {
@@ -453,6 +503,11 @@ export class ProductDetailComponent {
         : null;
 
     if (returnUrl && this.shopRouteService.isCatalogUrl(returnUrl)) {
+      if (this.isBrowser && window.history.length > 1) {
+        this.location.back();
+        return;
+      }
+
       void this.router.navigateByUrl(returnUrl);
       return;
     }
@@ -512,25 +567,34 @@ export class ProductDetailComponent {
       this.translate.instant('SHOP.CATALOG_META_DESCRIPTION');
     const robots =
       product.indexable === false ? 'noindex, nofollow' : 'index, follow';
+    const lang = this.languageService.selectedLang();
+    const canonicalPath =
+      product.localizedPaths?.[lang] ?? product.localizedPaths?.it ?? null;
 
-    this.seoService.applyPageSeo({
+    this.seoService.applyResolvedSeo({
       title,
       description,
       robots,
       ogTitle: product.ogTitle || title,
       ogDescription: product.ogDescription || description,
+      canonicalPath,
+      alternates: product.localizedPaths,
+      xDefault: product.localizedPaths?.it ?? canonicalPath,
     });
   }
 
   private applyFallbackSeo(): void {
     const title = `${this.translate.instant('SHOP.TITLE')} | 3D fab`;
     const description = this.translate.instant('SHOP.CATALOG_META_DESCRIPTION');
-    this.seoService.applyPageSeo({
+    this.seoService.applyResolvedSeo({
       title,
       description,
-      robots: 'index, follow',
+      robots: 'noindex, nofollow',
       ogTitle: title,
       ogDescription: description,
+      canonicalPath: null,
+      alternates: null,
+      xDefault: null,
     });
   }
 
@@ -705,21 +769,23 @@ export class ProductDetailComponent {
       return;
     }
 
-    const currentProductSlug = this.productSlug()?.trim().toLowerCase() ?? '';
+    const currentTree = this.router.parseUrl(this.router.url);
-    const targetProductSlug = this.shopRouteService.productPathSegment(product);
+    const lang = this.languageService.selectedLang();
-    if (currentProductSlug === targetProductSlug) {
+    const targetPath =
+      product.localizedPaths?.[lang] ??
+      `/${lang}/shop/p/${this.shopRouteService.productPathSegment(product)}`;
+    const normalizedTargetPath = targetPath.startsWith('/')
+      ? targetPath
+      : `/${targetPath}`;
+    const currentPath = this.router
+      .serializeUrl(currentTree)
+      .split(/[?#]/, 1)[0];
+    if (currentPath === normalizedTargetPath) {
       return;
     }
 
-    const currentTree = this.router.parseUrl(this.router.url);
     const targetTree = this.router.createUrlTree(
-      [
+      ['/', ...normalizedTargetPath.split('/').filter(Boolean)],
-        '/',
-        this.languageService.selectedLang(),
-        'shop',
-        'p',
-        targetProductSlug,
-      ],
       {
         queryParams: currentTree.queryParams,
         fragment: currentTree.fragment ?? undefined,
@@ -738,4 +804,10 @@ export class ProductDetailComponent {
       state: history.state,
     });
   }
+
+  private setResponseStatus(status: number): void {
+    if (this.responseInit) {
+      this.responseInit.status = status;
+    }
+  }
 }

frontend/src/app/features/shop/services/shop-route.service.ts

@@ -1,15 +1,14 @@
 import { Injectable } from '@angular/core';
 import { LanguageService } from '../../../core/services/language.service';
 
+type SupportedLang = 'it' | 'en' | 'de' | 'fr';
+
 export interface ShopProductRouteRef {
   id: string | null | undefined;
   name: string | null | undefined;
   slug?: string | null | undefined;
-}
+  publicPath?: string | null | undefined;
-
+  localizedPaths?: Partial<Record<SupportedLang, string>> | null | undefined;
-export interface ShopProductLookup {
-  idPrefix: string | null;
-  slugHint: string | null;
 }
 
 @Injectable({
@@ -26,11 +25,21 @@ export class ShopRouteService {
   }
 
   productCommands(product: ShopProductRouteRef): string[] {
+    const localizedPath = this.localizedProductPath(product);
+    if (localizedPath) {
+      return ['/', ...localizedPath.split('/').filter(Boolean)];
+    }
+
     const lang = this.languageService.currentLang();
     return ['/', lang, 'shop', 'p', this.productPathSegment(product)];
   }
 
   productPathSegment(product: ShopProductRouteRef): string {
+    const publicPath = String(product.publicPath ?? '').trim();
+    if (publicPath) {
+      return publicPath;
+    }
+
     const idPrefix = this.productIdPrefix(product.id);
     const tail =
       this.slugify(product.name) || this.slugify(product.slug) || 'product';
@@ -38,41 +47,6 @@ export class ShopRouteService {
     return idPrefix ? `${idPrefix}-${tail}` : tail;
   }
 
-  resolveProductLookup(
-    productPathSegment: string | null | undefined,
-  ): ShopProductLookup {
-    const normalized = String(productPathSegment ?? '')
-      .trim()
-      .toLowerCase();
-    if (!normalized) {
-      return {
-        idPrefix: null,
-        slugHint: null,
-      };
-    }
-
-    const bareUuidMatch = normalized.match(/^([0-9a-f]{8})$/);
-    if (bareUuidMatch) {
-      return {
-        idPrefix: bareUuidMatch[1],
-        slugHint: null,
-      };
-    }
-
-    const publicSlugMatch = normalized.match(/^([0-9a-f]{8})-(.+)$/);
-    if (publicSlugMatch) {
-      return {
-        idPrefix: publicSlugMatch[1],
-        slugHint: this.slugify(publicSlugMatch[2]) || null,
-      };
-    }
-
-    return {
-      idPrefix: null,
-      slugHint: normalized,
-    };
-  }
-
   isCatalogUrl(url: string | null | undefined): boolean {
     if (!url) {
       return false;
@@ -92,6 +66,12 @@ export class ShopRouteService {
       .replace(/-{2,}/g, '-');
   }
 
+  private localizedProductPath(product: ShopProductRouteRef): string | null {
+    const lang = this.languageService.currentLang();
+    const localizedPath = String(product.localizedPaths?.[lang] ?? '').trim();
+    return localizedPath.startsWith('/') ? localizedPath : null;
+  }
+
   private productIdPrefix(productId: string | null | undefined): string {
     const normalized = String(productId ?? '')
       .trim()

frontend/src/app/features/shop/services/shop.service.spec.ts

@@ -112,6 +112,13 @@ describe('ShopService', () => {
         defaultVariant: null,
         primaryImage: null,
         model3d: null,
+        publicPath: '12345678-supporto-cavo-scrivania',
+        localizedPaths: {
+          it: '/it/shop/p/12345678-supporto-cavo-scrivania',
+          en: '/en/shop/p/12345678-desk-cable-clip',
+          de: '/de/shop/p/12345678-schreibtisch-kabelhalter',
+          fr: '/fr/shop/p/12345678-support-cable-bureau',
+        },
       },
     ],
   });
@@ -142,6 +149,13 @@ describe('ShopService', () => {
     primaryImage: null,
     images: [],
     model3d: null,
+    publicPath: '12345678-supporto-cavo-scrivania',
+    localizedPaths: {
+      it: '/it/shop/p/12345678-supporto-cavo-scrivania',
+      en: '/en/shop/p/12345678-desk-cable-clip',
+      de: '/de/shop/p/12345678-schreibtisch-kabelhalter',
+      fr: '/fr/shop/p/12345678-support-cable-bureau',
+    },
   });
 
   beforeEach(() => {
@@ -235,13 +249,14 @@ describe('ShopService', () => {
     expect(response?.name).toBe('Supporto cavo scrivania');
   });
 
-  it('resolves product detail from uuid prefix even when slug tail does not match', () => {
+  it('rejects product paths whose slug tail does not match the canonical path', () => {
-    let response: ShopProductDetail | undefined;
+    let errorResponse: { status?: number } | undefined;
 
-    service
+    service.getProductByPublicPath('12345678-qualunque-nome').subscribe({
-      .getProductByPublicPath('12345678-qualunque-nome')
+      next: () => fail('Expected canonical path mismatch to return 404'),
-      .subscribe((product) => {
+      error: (error) => {
-        response = product;
+        errorResponse = error;
+      },
     });
 
     const catalogRequest = httpMock.expectOne((request) => {
@@ -253,24 +268,20 @@ describe('ShopService', () => {
     });
     catalogRequest.flush(buildCatalog());
 
-    const detailRequest = httpMock.expectOne((request) => {
+    httpMock.expectNone(
-      return (
+      'http://localhost:8000/api/shop/products/desk-cable-clip',
-        request.method === 'GET' &&
-        request.url ===
-          'http://localhost:8000/api/shop/products/desk-cable-clip' &&
-        request.params.get('lang') === 'it'
     );
-    });
+    expect(errorResponse?.status).toBe(404);
-    detailRequest.flush(buildProduct());
-
-    expect(response?.id).toBe('12345678-abcd-4abc-9abc-1234567890ab');
   });
 
-  it('resolves product detail from bare uuid prefix without slug tail', () => {
+  it('rejects bare uuid product paths without the localized slug tail', () => {
-    let response: ShopProductDetail | undefined;
+    let errorResponse: { status?: number } | undefined;
 
-    service.getProductByPublicPath('12345678').subscribe((product) => {
+    service.getProductByPublicPath('12345678').subscribe({
-      response = product;
+      next: () => fail('Expected bare uuid path to return 404'),
+      error: (error) => {
+        errorResponse = error;
+      },
     });
 
     const catalogRequest = httpMock.expectOne((request) => {
@@ -282,16 +293,9 @@ describe('ShopService', () => {
     });
     catalogRequest.flush(buildCatalog());
 
-    const detailRequest = httpMock.expectOne((request) => {
+    httpMock.expectNone(
-      return (
+      'http://localhost:8000/api/shop/products/desk-cable-clip',
-        request.method === 'GET' &&
-        request.url ===
-          'http://localhost:8000/api/shop/products/desk-cable-clip' &&
-        request.params.get('lang') === 'it'
     );
-    });
+    expect(errorResponse?.status).toBe(404);
-    detailRequest.flush(buildProduct());
-
-    expect(response?.id).toBe('12345678-abcd-4abc-9abc-1234567890ab');
   });
 });

frontend/src/app/features/shop/services/shop.service.ts

@@ -7,7 +7,9 @@ import {
   PublicMediaVariantDto,
 } from '../../../core/services/public-media.service';
 import { LanguageService } from '../../../core/services/language.service';
-import { ShopRouteService } from './shop-route.service';
+
+type SupportedLang = 'it' | 'en' | 'de' | 'fr';
+type LocalizedPathMap = Partial<Record<SupportedLang, string>>;
 
 export interface ShopCategoryRef {
   id: string;
@@ -84,6 +86,8 @@ export interface ShopProductSummary {
   defaultVariant: ShopProductVariantOption | null;
   primaryImage: PublicMediaUsageDto | null;
   model3d: ShopProductModel | null;
+  publicPath: string;
+  localizedPaths: LocalizedPathMap;
 }
 
 export interface ShopProductDetail {
@@ -108,6 +112,8 @@ export interface ShopProductDetail {
   primaryImage: PublicMediaUsageDto | null;
   images: PublicMediaUsageDto[];
   model3d: ShopProductModel | null;
+  publicPath: string;
+  localizedPaths: LocalizedPathMap;
 }
 
 export interface ShopProductCatalogResponse {
@@ -185,7 +191,6 @@ export interface ShopCategoryNavNode {
 export class ShopService {
   private readonly http = inject(HttpClient);
   private readonly languageService = inject(LanguageService);
-  private readonly shopRouteService = inject(ShopRouteService);
   private readonly apiUrl = `${environment.apiUrl}/api/shop`;
 
   readonly cart = signal<ShopCartResponse | null>(null);
@@ -278,16 +283,18 @@ export class ShopService {
   getProductByPublicPath(
     productPathSegment: string,
   ): Observable<ShopProductDetail> {
-    const lookup =
+    const normalizedPath = this.normalizePublicPath(productPathSegment);
-      this.shopRouteService.resolveProductLookup(productPathSegment);
+    if (!normalizedPath) {
-    if (!lookup.idPrefix && lookup.slugHint) {
+      return throwError(() => ({
-      return this.getProduct(lookup.slugHint);
+        status: 404,
+      }));
     }
 
     return this.getProductCatalog().pipe(
       map((catalog) =>
-        catalog.products.find((product) =>
+        catalog.products.find(
-          product.id.toLowerCase().startsWith(lookup.idPrefix ?? ''),
+          (product) =>
+            this.normalizePublicPath(product.publicPath) === normalizedPath,
         ),
       ),
       switchMap((product) => {
@@ -301,6 +308,12 @@ export class ShopService {
     );
   }
 
+  private normalizePublicPath(value: string | null | undefined): string {
+    return String(value ?? '')
+      .trim()
+      .toLowerCase();
+  }
+
   loadCart(): Observable<ShopCartResponse> {
     this.cartLoading.set(true);
     return this.http

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

@@ -332,6 +332,10 @@
 }
 
 @media (max-width: 760px) {
+  .cart-card {
+    display: none;
+  }
+
   .product-grid {
     grid-template-columns: 1fr;
   }

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

@@ -1,5 +1,7 @@
 import { CommonModule } from '@angular/common';
 import {
+  RESPONSE_INIT,
+  afterNextRender,
   Component,
   DestroyRef,
   Injector,
@@ -59,6 +61,7 @@ export class ShopPageComponent {
   private readonly router = inject(Router);
   private readonly translate = inject(TranslateService);
   private readonly seoService = inject(SeoService);
+  private readonly responseInit = inject(RESPONSE_INIT, { optional: true });
   readonly languageService = inject(LanguageService);
   private readonly shopRouteService = inject(ShopRouteService);
   readonly shopService = inject(ShopService);
@@ -89,16 +92,9 @@ export class ShopPageComponent {
   readonly cartHasItems = computed(() => this.cartItems().length > 0);
 
   constructor() {
-    if (!this.shopService.cartLoaded()) {
+    afterNextRender(() => {
-      this.shopService
+      this.scheduleCartWarmup();
-        .loadCart()
-        .pipe(takeUntilDestroyed(this.destroyRef))
-        .subscribe({
-          error: () => {
-            this.shopService.cart.set(null);
-          },
     });
-    }
 
     combineLatest([
       toObservable(this.categorySlug, { injector: this.injector }),
@@ -124,7 +120,10 @@ export class ShopPageComponent {
               this.error.set(
                 error?.status === 404 ? 'SHOP.NOT_FOUND' : 'SHOP.LOAD_ERROR',
               );
-              this.applyDefaultSeo();
+              if (error?.status === 404) {
+                this.setResponseStatus(404);
+              }
+              this.applyErrorSeo();
               return of(null);
             }),
             finalize(() => this.loading.set(false)),
@@ -147,6 +146,46 @@ export class ShopPageComponent {
         this.selectedCategory.set(result.catalog.category ?? null);
         this.products.set(result.catalog.products);
         this.applySeo(result.catalog.category ?? null);
+        this.restoreCatalogScrollIfNeeded();
+      });
+  }
+
+  private scheduleCartWarmup(): void {
+    if (typeof window === 'undefined') {
+      this.loadCartIfNeeded();
+      return;
+    }
+
+    const warmup = () => this.loadCartIfNeeded();
+    const idleCallback = (
+      window as Window & {
+        requestIdleCallback?: (
+          callback: IdleRequestCallback,
+          options?: IdleRequestOptions,
+        ) => number;
+      }
+    ).requestIdleCallback;
+
+    if (typeof idleCallback === 'function') {
+      idleCallback(() => warmup(), { timeout: 1500 });
+      return;
+    }
+
+    window.setTimeout(warmup, 300);
+  }
+
+  private loadCartIfNeeded(): void {
+    if (this.shopService.cartLoaded() || this.shopService.cartLoading()) {
+      return;
+    }
+
+    this.shopService
+      .loadCart()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe({
+        error: () => {
+          this.shopService.cart.set(null);
+        },
       });
   }
 
@@ -242,11 +281,14 @@ export class ShopPageComponent {
     if (!sessionId) {
       return;
     }
-    this.router.navigate(['/', this.languageService.selectedLang(), 'checkout'], {
+    this.router.navigate(
+      ['/', this.languageService.selectedLang(), 'checkout'],
+      {
         queryParams: {
           session: sessionId,
         },
-    });
+      },
+    );
   }
 
   trackByCategory(_index: number, item: ShopCategoryNavNode): string {
@@ -317,4 +359,46 @@ export class ShopPageComponent {
       ogDescription: description,
     });
   }
+
+  private applyErrorSeo(): void {
+    const title = `${this.translate.instant('SHOP.TITLE')} | 3D fab`;
+    const description = this.translate.instant('SHOP.CATALOG_META_DESCRIPTION');
+
+    this.seoService.applyResolvedSeo({
+      title,
+      description,
+      robots: 'noindex, nofollow',
+      ogTitle: title,
+      ogDescription: description,
+      canonicalPath: null,
+      alternates: null,
+      xDefault: null,
+    });
+  }
+
+  private setResponseStatus(status: number): void {
+    if (this.responseInit) {
+      this.responseInit.status = status;
+    }
+  }
+
+  private restoreCatalogScrollIfNeeded(): void {
+    if (typeof window === 'undefined') {
+      return;
+    }
+
+    const scrollY = Number(history.state?.shopRestoreScrollY);
+    if (!Number.isFinite(scrollY) || scrollY < 0) {
+      return;
+    }
+
+    const { shopRestoreScrollY: _ignored, ...nextState } = history.state ?? {};
+    const restore = () => window.scrollTo({ left: 0, top: scrollY });
+
+    history.replaceState(nextState, '');
+    window.requestAnimationFrame(() => {
+      restore();
+      window.setTimeout(restore, 60);
+    });
+  }
 }

frontend/src/app/shared/components/app-dropzone/app-dropzone.component.ts

@@ -12,7 +12,7 @@ import { TranslateModule } from '@ngx-translate/core';
 export class AppDropzoneComponent {
   label = input<string>('DROPZONE.DEFAULT_LABEL');
   subtext = input<string>('DROPZONE.DEFAULT_SUBTEXT');
-  accept = input<string>('.stl,.3mf,.step,.stp');
+  accept = input<string>('.stl,.3mf');
   multiple = input<boolean>(true);
 
   filesDropped = output<File[]>();

frontend/src/app/shared/components/brand-animation-logo/brand-animation-logo.component.html

@@ -0,0 +1,17 @@
+<div
+  class="brand-animation"
+  [attr.data-variant]="variant()"
+  role="img"
+  [attr.aria-hidden]="decorative() ? 'true' : null"
+  [attr.aria-label]="decorative() ? null : ariaLabel()"
+>
+  @for (letter of resolvedLetters(); track letter.key) {
+    <img
+      class="brand-animation__letter"
+      [src]="letter.src"
+      alt=""
+      [attr.data-letter]="letter.key"
+      [style.--word-x]="letter.wordX"
+    />
+  }
+</div>

frontend/src/app/shared/components/brand-animation-logo/brand-animation-logo.component.scss

@@ -0,0 +1,172 @@
+:host {
+  display: block;
+  width: 100%;
+}
+
+.brand-animation {
+  --three-anchor-x: -9.4rem;
+  --bee-anchor-x: 10.2rem;
+  --word-scale: var(--brand-animation-scale, 1);
+  --word-spacing-factor: var(--brand-animation-word-spacing, 1);
+  --loader-group-scale-x: 0.94;
+  --loader-group-scale-y: 1.05;
+  --loader-exit-shift: 1.6rem;
+  position: relative;
+  width: min(100%, var(--brand-animation-width, 26rem));
+  height: var(--brand-animation-height, 8rem);
+  margin-inline: auto;
+}
+
+.brand-animation__letter {
+  --word-x: 0rem;
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  width: var(--brand-animation-letter-width, clamp(2.7rem, 6vw, 4rem));
+  height: auto;
+  transform: translate(-50%, -50%);
+  transform-origin: center center;
+  will-change: transform;
+}
+
+.brand-animation[data-variant="site-intro"] .brand-animation__letter {
+  animation: site-intro-preview var(--brand-animation-site-intro-duration, 1s)
+    linear 1 forwards;
+}
+
+.brand-animation[data-variant="calculator-loader"] .brand-animation__letter {
+  animation: calculator-loader-loop
+    var(--brand-animation-loader-loop-duration, 2.65s) infinite;
+}
+
+@keyframes site-intro-preview {
+  0% {
+    transform: translate(-50%, -50%) translateX(0) scale(0.92);
+  }
+
+  20% {
+    transform: translate(-50%, -50%) translateX(0) scale(0.92);
+  }
+
+  80% {
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(var(--word-x) * var(--word-scale) * var(--word-spacing-factor))
+      )
+      scale(1);
+  }
+
+  100% {
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(var(--word-x) * var(--word-scale) * var(--word-spacing-factor))
+      )
+      scale(1);
+  }
+}
+
+@keyframes calculator-loader-loop {
+  0%,
+  5% {
+    opacity: 0;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(
+          var(--three-anchor-x) * var(--word-scale) * var(--word-spacing-factor)
+        )
+      )
+      scaleX(var(--loader-group-scale-x)) scaleY(var(--loader-group-scale-y));
+  }
+
+  12% {
+    opacity: 1;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(
+          var(--three-anchor-x) * var(--word-scale) * var(--word-spacing-factor)
+        )
+      )
+      scaleX(var(--loader-group-scale-x)) scaleY(var(--loader-group-scale-y));
+  }
+
+  12% {
+    animation-timing-function: cubic-bezier(0.22, 0.82, 0.28, 1);
+  }
+
+  38%,
+  56% {
+    opacity: 1;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(var(--word-x) * var(--word-scale) * var(--word-spacing-factor))
+      )
+      scale(1);
+  }
+
+  56% {
+    animation-timing-function: cubic-bezier(0.38, 0, 0.72, 1);
+  }
+
+  82%,
+  88% {
+    opacity: 1;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(
+          var(--bee-anchor-x) * var(--word-scale) * var(--word-spacing-factor)
+        )
+      )
+      scaleX(var(--loader-group-scale-x)) scaleY(var(--loader-group-scale-y));
+  }
+
+  88% {
+    animation-timing-function: cubic-bezier(0.4, 0, 1, 1);
+  }
+
+  94% {
+    opacity: 0;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(
+          (var(--bee-anchor-x) + var(--loader-exit-shift)) * var(--word-scale) *
+            var(--word-spacing-factor)
+        )
+      )
+      scaleX(0.98) scaleY(1.02);
+  }
+
+  94.01%,
+  100% {
+    opacity: 0;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(
+          var(--three-anchor-x) * var(--word-scale) * var(--word-spacing-factor)
+        )
+      )
+      scaleX(var(--loader-group-scale-x)) scaleY(var(--loader-group-scale-y));
+  }
+}
+
+@media (max-width: 640px) {
+  .brand-animation {
+    width: min(100%, var(--brand-animation-width-mobile, 19rem));
+    height: var(--brand-animation-height-mobile, 6rem);
+    --word-scale: var(--brand-animation-scale-mobile, 0.74);
+  }
+
+  .brand-animation__letter {
+    width: var(--brand-animation-letter-width-mobile, 2.8rem);
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .brand-animation__letter {
+    animation: none !important;
+    transform: translate(-50%, -50%)
+      translateX(
+        calc(var(--word-x) * var(--word-scale) * var(--word-spacing-factor))
+      )
+      scale(1);
+  }
+}

frontend/src/app/shared/components/brand-animation-logo/brand-animation-logo.component.ts

@@ -0,0 +1,69 @@
+import { Component, computed, input } from '@angular/core';
+
+export type BrandAnimationVariant = 'site-intro' | 'calculator-loader';
+
+interface AnimationLetter {
+  key: string;
+  darkSrc: string;
+  yellowSrc: string;
+  wordX: string;
+}
+
+interface ResolvedAnimationLetter {
+  key: string;
+  src: string;
+  wordX: string;
+}
+
+const LETTERS: readonly AnimationLetter[] = [
+  {
+    key: '3',
+    darkSrc: '/assets/images/animation/31200.svg',
+    yellowSrc: '/assets/images/animation/3g1200.svg',
+    wordX: '-9.4rem',
+  },
+  {
+    key: 'd',
+    darkSrc: '/assets/images/animation/d1200.svg',
+    yellowSrc: '/assets/images/animation/Dg1200.svg',
+    wordX: '-4.9rem',
+  },
+  {
+    key: 'F',
+    darkSrc: '/assets/images/animation/F1200.svg',
+    yellowSrc: '/assets/images/animation/Fg1200.svg',
+    wordX: '1rem',
+  },
+  {
+    key: 'A',
+    darkSrc: '/assets/images/animation/A1200.svg',
+    yellowSrc: '/assets/images/animation/Ag1200.svg',
+    wordX: '5.6rem',
+  },
+  {
+    key: 'B',
+    darkSrc: '/assets/images/animation/B1200.svg',
+    yellowSrc: '/assets/images/animation/Bg1200.svg',
+    wordX: '10.2rem',
+  },
+] as const;
+
+@Component({
+  selector: 'app-brand-animation-logo',
+  standalone: true,
+  templateUrl: './brand-animation-logo.component.html',
+  styleUrl: './brand-animation-logo.component.scss',
+})
+export class BrandAnimationLogoComponent {
+  readonly variant = input<BrandAnimationVariant>('site-intro');
+  readonly decorative = input(true);
+  readonly ariaLabel = input('3D fab animated logo');
+
+  readonly resolvedLetters = computed<ResolvedAnimationLetter[]>(() =>
+    LETTERS.map((letter) => ({
+      key: letter.key,
+      src: this.variant() === 'site-intro' ? letter.yellowSrc : letter.darkSrc,
+      wordX: letter.wordX,
+    })),
+  );
+}

frontend/src/assets/i18n/de.json

@@ -107,14 +107,14 @@
   },
   "CALC": {
     "TITLE": "3D-Angebot berechnen",
-    "SUBTITLE": "Laden Sie Ihre 3D-Datei (STL, 3MF, STEP) hoch, stellen Sie Qualität und Farbe ein und berechnen Sie sofort Preis und Lieferzeit.",
+    "SUBTITLE": "Laden Sie Ihre 3D-Datei (STL, 3MF) hoch, stellen Sie Qualität und Farbe ein und berechnen Sie sofort Preis und Lieferzeit.",
     "CTA_START": "Jetzt starten",
     "BUSINESS": "Unternehmen",
     "PRIVATE": "Privat",
     "MODE_EASY": "Basis",
     "MODE_ADVANCED": "Erweitert",
     "UPLOAD_LABEL": "Ziehen Sie Ihre 3D-Datei hierher",
-    "UPLOAD_SUB": "Wir unterstützen STL, 3MF, STEP bis 50MB",
+    "UPLOAD_SUB": "Wir unterstützen STL, 3MF bis 50MB",
     "MATERIAL": "Material",
     "QUALITY": "Qualität",
     "QUANTITY": "Menge",
@@ -141,11 +141,12 @@
     "BENEFITS_2": "Ausgewählte Materialien und Qualitätskontrolle",
     "BENEFITS_3": "CAD-Beratung, falls die Datei Änderungen benötigt",
     "ERR_FILE_REQUIRED": "Die Datei ist erforderlich.",
-    "STEP_WARNING": "Die 3D-Ansicht ist mit STEP- und 3MF-Dateien nicht kompatibel",
+    "STEP_WARNING": "Die 3D-Vorschau ist nur für STL-Dateien verfügbar.",
     "REMOVE_FILE": "Datei entfernen",
     "FALLBACK_MATERIAL": "PLA (Fallback)",
     "FALLBACK_QUALITY_STANDARD": "Standard",
     "ERR_FILE_TOO_LARGE": "Einige Dateien überschreiten das 200MB-Limit und wurden nicht hinzugefügt.",
+    "ERR_INVALID_FILE_TYPE": "Sie können nur Dateien vom Typ .stl oder .3mf hochladen.",
     "PRINT_SPEED": "Druckgeschwindigkeit",
     "COLOR": "Farbe",
     "ANALYZING_TITLE": "Analyse läuft...",
@@ -624,7 +625,7 @@
     "BTN_CONTACT": "Mit uns sprechen",
     "SEC_CALC_TITLE": "Korrekte Preisberechnung in wenigen Sekunden",
     "SEC_CALC_SUBTITLE": "Keine Registrierung erforderlich. Die Schätzung basiert auf echtem Slicing.",
-    "SEC_CALC_LIST_1": "Unterstützte Formate: STL, 3MF, STEP",
+    "SEC_CALC_LIST_1": "Unterstützte Formate: STL, 3MF",
     "CARD_CALC_EYEBROW": "Automatische Berechnung",
     "CARD_CALC_TITLE": "Preis und Lieferzeit mit einem Klick",
     "CARD_CALC_TAG": "Ohne Registrierung",
@@ -674,7 +675,7 @@
   },
   "DROPZONE": {
     "DEFAULT_LABEL": "Dateien hierher ziehen oder klicken zum Hochladen",
-    "DEFAULT_SUBTEXT": "Unterstützt .STL, .3MF, .STEP"
+    "DEFAULT_SUBTEXT": "Unterstützt .STL, .3MF"
   },
   "COLOR": {
     "AVAILABLE_COLORS": "Verfügbare Farben",

frontend/src/assets/i18n/en.json

@@ -107,14 +107,14 @@
   },
   "CALC": {
     "TITLE": "3D Print Calculator",
-    "SUBTITLE": "Upload your 3D file (STL, 3MF, STEP...) and get an instant estimate of costs and print time.",
+    "SUBTITLE": "Upload your 3D file (STL, 3MF) and get an instant estimate of costs and print time.",
     "CTA_START": "Start Now",
     "BUSINESS": "Business",
     "PRIVATE": "Private",
     "MODE_EASY": "Quick",
     "MODE_ADVANCED": "Advanced",
     "UPLOAD_LABEL": "Drag your 3D file here",
-    "UPLOAD_SUB": "Supports STL, 3MF, STEP up to 50MB",
+    "UPLOAD_SUB": "Supports STL, 3MF up to 50MB",
     "MATERIAL": "Material",
     "QUALITY": "Quality",
     "QUANTITY": "Quantity",
@@ -141,11 +141,12 @@
     "BENEFITS_2": "Selected materials and quality control",
     "BENEFITS_3": "CAD consultation if file needs modifications",
     "ERR_FILE_REQUIRED": "File is required.",
-    "STEP_WARNING": "3D preview is not available for STEP files, but the calculator works perfectly. You can proceed with the quotation.",
+    "STEP_WARNING": "3D preview is available only for STL files.",
     "REMOVE_FILE": "Remove file",
     "FALLBACK_MATERIAL": "PLA (fallback)",
     "FALLBACK_QUALITY_STANDARD": "Standard",
     "ERR_FILE_TOO_LARGE": "Some files exceed the 200MB limit and were not added.",
+    "ERR_INVALID_FILE_TYPE": "You can upload only .stl or .3mf files.",
     "PRINT_SPEED": "Print speed",
     "COLOR": "Color",
     "ANALYZING_TITLE": "Analysis in progress...",
@@ -624,7 +625,7 @@
     "BTN_CONTACT": "Talk to us",
     "SEC_CALC_TITLE": "Accurate pricing in a few seconds",
     "SEC_CALC_SUBTITLE": "No registration required. The estimate is calculated through real slicing.",
-    "SEC_CALC_LIST_1": "Supported formats: STL, 3MF, STEP",
+    "SEC_CALC_LIST_1": "Supported formats: STL, 3MF",
     "CARD_CALC_EYEBROW": "Automatic calculation",
     "CARD_CALC_TITLE": "Price and lead time in one click",
     "CARD_CALC_TAG": "No registration",
@@ -674,7 +675,7 @@
   },
   "DROPZONE": {
     "DEFAULT_LABEL": "Drop files here or click to upload",
-    "DEFAULT_SUBTEXT": "Supports .stl, .3mf, .step"
+    "DEFAULT_SUBTEXT": "Supports .stl, .3mf"
   },
   "COLOR": {
     "AVAILABLE_COLORS": "Available colors",

frontend/src/assets/i18n/fr.json

@@ -96,7 +96,7 @@
     "BTN_CONTACT": "Parlez avec nous",
     "SEC_CALC_TITLE": "Prix correct en quelques secondes",
     "SEC_CALC_SUBTITLE": "Aucune inscription requise. L'estimation est effectuée via un vrai slicing.",
-    "SEC_CALC_LIST_1": "Formats pris en charge : STL, 3MF, STEP",
+    "SEC_CALC_LIST_1": "Formats pris en charge : STL, 3MF",
     "CARD_CALC_EYEBROW": "Calcul automatique",
     "CARD_CALC_TITLE": "Prix et délais en un clic",
     "CARD_CALC_TAG": "Sans inscription",
@@ -139,14 +139,14 @@
   },
   "CALC": {
     "TITLE": "Calculer un devis 3D",
-    "SUBTITLE": "Chargez votre fichier 3D (STL, 3MF, STEP), réglez la qualité et la couleur puis calculez immédiatement prix et délais.",
+    "SUBTITLE": "Chargez votre fichier 3D (STL, 3MF), réglez la qualité et la couleur puis calculez immédiatement prix et délais.",
     "CTA_START": "Commencer maintenant",
     "BUSINESS": "Entreprises",
     "PRIVATE": "Particuliers",
     "MODE_EASY": "Base",
     "MODE_ADVANCED": "Avancée",
     "UPLOAD_LABEL": "Glissez votre fichier 3D ici",
-    "UPLOAD_SUB": "Nous prenons en charge STL, 3MF, STEP jusqu'à 50MB",
+    "UPLOAD_SUB": "Nous prenons en charge STL, 3MF jusqu'à 50MB",
     "MATERIAL": "Matériau",
     "QUALITY": "Qualité",
     "PRINT_SPEED": "Vitesse d'impression",
@@ -185,11 +185,12 @@
     "NOTES_PLACEHOLDER": "Instructions spécifiques...",
     "SETUP_NOTE": "* Inclut {{cost}} comme coût de setup",
     "SHIPPING_NOTE": "* Frais d'expédition exclus, calculés à l'étape suivante",
-    "STEP_WARNING": "La visualisation 3D n'est pas compatible avec les fichiers STEP et 3MF",
+    "STEP_WARNING": "La prévisualisation 3D est disponible uniquement pour les fichiers STL.",
     "REMOVE_FILE": "Supprimer le fichier",
     "FALLBACK_MATERIAL": "PLA (fallback)",
     "FALLBACK_QUALITY_STANDARD": "Standard",
     "ERR_FILE_TOO_LARGE": "Certains fichiers dépassent la limite de 200MB et n'ont pas été ajoutés.",
+    "ERR_INVALID_FILE_TYPE": "Vous pouvez téléverser uniquement des fichiers .stl ou .3mf.",
     "ERROR_ZERO_PRICE": "Un problème est survenu pendant le calcul. Essayez un autre format ou contactez-nous directement via Demander une consultation.",
     "ZERO_RESULT_TITLE": "Résultat invalide",
     "ZERO_RESULT_HELP": "Le calcul a renvoyé des valeurs nulles invalides. Essayez un autre format de fichier ou contactez-nous directement via Demander une consultation."
@@ -680,7 +681,7 @@
   },
   "DROPZONE": {
     "DEFAULT_LABEL": "Glissez les fichiers ici ou cliquez pour téléverser",
-    "DEFAULT_SUBTEXT": "Prend en charge .STL, .3MF, .STEP"
+    "DEFAULT_SUBTEXT": "Prend en charge .STL, .3MF"
   },
   "COLOR": {
     "AVAILABLE_COLORS": "Couleurs disponibles",

frontend/src/assets/i18n/it.json

@@ -96,7 +96,7 @@
     "BTN_CONTACT": "Parla con noi",
     "SEC_CALC_TITLE": "Prezzo corretto in pochi secondi",
     "SEC_CALC_SUBTITLE": "Nessuna registrazione necessaria. La stima è effettuata tramite vero slicing.",
-    "SEC_CALC_LIST_1": "Formati supportati: STL, 3MF, STEP",
+    "SEC_CALC_LIST_1": "Formati supportati: STL, 3MF",
     "CARD_CALC_EYEBROW": "Calcolo automatico",
     "CARD_CALC_TITLE": "Prezzo e tempi in un click",
     "CARD_CALC_TAG": "Senza registrazione",
@@ -139,14 +139,14 @@
   },
   "CALC": {
     "TITLE": "Calcola Preventivo 3D",
-    "SUBTITLE": "Carica il tuo file 3D (STL, 3MF, STEP), imposta la qualità, il colore e calcola immediatamente prezzo e tempi.",
+    "SUBTITLE": "Carica il tuo file 3D (STL, 3MF), imposta la qualità, il colore e calcola immediatamente prezzo e tempi.",
     "CTA_START": "Inizia Ora",
     "BUSINESS": "Aziende",
     "PRIVATE": "Privati",
     "MODE_EASY": "Base",
     "MODE_ADVANCED": "Avanzata",
     "UPLOAD_LABEL": "Trascina il tuo file 3D qui",
-    "UPLOAD_SUB": "Supportiamo STL, 3MF, STEP fino a 50MB",
+    "UPLOAD_SUB": "Supportiamo STL, 3MF fino a 50MB",
     "MATERIAL": "Materiale",
     "QUALITY": "Qualità",
     "PRINT_SPEED": "Velocità di Stampa",
@@ -185,11 +185,12 @@
     "NOTES_PLACEHOLDER": "Istruzioni specifiche...",
     "SETUP_NOTE": "* Include {{cost}} come costo di setup",
     "SHIPPING_NOTE": "* Costi di spedizione esclusi, calcolati al passaggio successivo",
-    "STEP_WARNING": "La visualizzazione 3D non è compatibile con i file step e 3mf",
+    "STEP_WARNING": "La visualizzazione 3D è disponibile solo per i file STL",
     "REMOVE_FILE": "Rimuovi file",
     "FALLBACK_MATERIAL": "PLA (fallback)",
     "FALLBACK_QUALITY_STANDARD": "Standard",
     "ERR_FILE_TOO_LARGE": "Alcuni file superano il limite di 200MB e non sono stati aggiunti.",
+    "ERR_INVALID_FILE_TYPE": "Puoi caricare solo file .stl o .3mf.",
     "ERROR_ZERO_PRICE": "Qualcosa è andato storto nel calcolo. Prova un altro formato o contattaci direttamente con Richiedi Consulenza.",
     "ZERO_RESULT_TITLE": "Risultato non valido",
     "ZERO_RESULT_HELP": "Il calcolo ha restituito valori non validi (0). Prova con un altro formato file oppure contattaci direttamente con Richiedi Consulenza."
@@ -680,7 +681,7 @@
   },
   "DROPZONE": {
     "DEFAULT_LABEL": "Trascina i file qui o clicca per caricare",
-    "DEFAULT_SUBTEXT": "Supporta .STL, .3MF, .STEP"
+    "DEFAULT_SUBTEXT": "Supporta .STL, .3MF"
   },
   "COLOR": {
     "AVAILABLE_COLORS": "Colori disponibili",

frontend/src/assets/images/animation/31200.svg

@@ -0,0 +1,207 @@
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