feat(products): implement professional product management experience

Products dashboard (real total/published/drafts/out-of-stock/hidden/missing-images/missing-SEO/low-quality counts, recently-edited list, recommended next action); list gains table/grid view toggle, density, saved column visibility and saved sort (persisted via LocalStorageService), plus real bulk assign-category/assign-tags/duplicate/CSV-export alongside existing publish/hide/delete; per-row and per-editor reusable ProductHealthWidget (images/SEO/price/category/description/inventory checklist + completion %); editor reorganized into General/Media/Pricing/Inventory/Categories/Attributes/SEO/Visibility/Advanced tabs, media now uses the shared MediaPickerComponent/ImageFieldComponent (primary image + reorderable gallery) instead of raw URL textareas, specifications/attributes/variants moved off pipe-delimited textareas onto the shared KeyValueEditorComponent, SEO tab explains fields in plain language with a live search-result preview, inventory relabeled in business language, toggles/badges use the shared Toggle/Badge components. Filled in the adminProducts i18n namespace (previously ~98% missing, rendering raw translation keys) across en/ru/hy.

src/app/i18n/translations.ts

@@ -1232,6 +1232,141 @@ export interface Translations {
   adminProducts: {
     emptyTitle: string;
     emptyDescription: string;
+    emptyGuide: string;
+    search: string;
+    category: string;
+    allCategories: string;
+    visibility: string;
+    allVisibility: string;
+    visible: string;
+    hidden: string;
+    stockStatus: string;
+    allStock: string;
+    inStock: string;
+    lowStock: string;
+    outOfStock: string;
+    sortTitle: string;
+    sortPrice: string;
+    sortPriority: string;
+    sortStock: string;
+    sortUpdated: string;
+    showArchived: string;
+    infiniteScroll: string;
+    viewMode: string;
+    viewTable: string;
+    viewGrid: string;
+    density: string;
+    densityComfortable: string;
+    densityCompact: string;
+    columns: string;
+    column_sku: string;
+    column_brand: string;
+    column_price: string;
+    column_stock: string;
+    column_visibility: string;
+    column_updated: string;
+    create: string;
+    edit: string;
+    duplicate: string;
+    selectedCount: string;
+    bulkShow: string;
+    bulkHide: string;
+    bulkAssignCategory: string;
+    bulkAssignTags: string;
+    bulkDuplicateAction: string;
+    bulkExportAction: string;
+    bulkDelete: string;
+    tagsPlaceholder: string;
+    name: string;
+    brand: string;
+    healthColumn: string;
+    actions: string;
+    archive: string;
+    delete: string;
+    items: string;
+    loadMore: string;
+    noImage: string;
+    slug: string;
+    barcode: string;
+    priority: string;
+    shortDescription: string;
+    translations: string;
+    primaryImage: string;
+    primaryImageHint: string;
+    gallery: string;
+    galleryHint: string;
+    moveLeft: string;
+    moveRight: string;
+    videos: string;
+    discount: string;
+    currency: string;
+    stockQuantity: string;
+    stockQuantityHint: string;
+    availabilityStatus: string;
+    availabilityStatusHint: string;
+    availabilityNote: string;
+    availabilityNoteHint: string;
+    reservedNote: string;
+    relatedProducts: string;
+    specifications: string;
+    attributes: string;
+    addRow: string;
+    removeRow: string;
+    rowKey: string;
+    rowValue: string;
+    addVariant: string;
+    variantName: string;
+    variantsHint: string;
+    seoExplain: string;
+    searchTitle: string;
+    searchTitleHint: string;
+    searchDescription: string;
+    searchDescriptionHint: string;
+    seoMissingTitle: string;
+    seoMissingDescription: string;
+    keywords: string;
+    featured: string;
+    recommended: string;
+    new: string;
+    bestseller: string;
+    badges: string;
+    htmlDescription: string;
+    customer: string;
+    reviewsReadonly: string;
+    noReviews: string;
+    questionsReadonly: string;
+    noQuestions: string;
+    save: string;
+    groupGeneral: string;
+    groupMedia: string;
+    groupPricing: string;
+    groupInventory: string;
+    groupCategories: string;
+    groupAttributes: string;
+    groupSeo: string;
+    groupVisibility: string;
+    groupAdvanced: string;
+    healthImages: string;
+    healthSeo: string;
+    healthPrice: string;
+    healthCategory: string;
+    healthDescription: string;
+    healthInventory: string;
+    totalProducts: string;
+    publishedCount: string;
+    draftsCount: string;
+    outOfStockCount: string;
+    hiddenCount: string;
+    missingImagesCount: string;
+    missingSeoCount: string;
+    lowQualityCount: string;
+    recentlyEdited: string;
+    recommendedNext: string;
+    openAction: string;
+    recommendAddImages: string;
+    recommendAddSeo: string;
+    recommendRestock: string;
+    recommendNone: string;
   };
   adminUsers: {
     emptyTitle: string;