feat(platform): sprint 11.5 standardization

docs/Catalog-Module-Report.md

@@ -215,3 +215,78 @@ Catalog spacing and controls were polished for desktop/tablet/mobile:
 	- `src/app/i18n/hy.ts`
 	- `src/app/i18n/translations.ts`
 - No hardcoded catalog UX strings were introduced for Sprint 10.2 additions.
+
+## Sprint 11 Search & Discovery Engine
+
+Sprint 11 introduces a reusable, backend-driven Search and Discovery architecture while preserving platform boundaries and existing domain models.
+
+### Search Domain Models
+
+Core search models were added under:
+
+- `src/app/core/search/models/search.model.ts`
+- `src/app/core/search/models/search-state.model.ts`
+
+Model coverage includes:
+
+- `SearchQuery`
+- `SearchResult`
+- `FilterGroup`
+- `FilterOption`
+- `SortOption`
+- `SearchSuggestion`
+- `SearchHistory`
+- `SearchState`
+
+### Search Entry Point
+
+- `src/app/facades/platform/search.facade.ts`
+
+`SearchFacade` is now the search orchestration entry point for the catalog UX and provides:
+
+- backend catalog loading bridge for search query payloads
+- metadata-driven sort option generation
+- metadata-driven dynamic filter group generation
+- live suggestions generation
+- in-memory filter metadata memoization
+- reusable filtering, sorting, and pagination helpers
+- query param serialization/deserialization for URL synchronization
+
+### History Service
+
+- `src/app/core/search/services/search-history.service.ts`
+
+Search history moved to a reusable core service with:
+
+- recent search tracking
+- popular search support
+- clear/reset support
+
+### Catalog UI Integration
+
+Catalog UI now consumes Search domain metadata and state:
+
+- `src/app/features/website/catalog/containers/catalog-container.component.ts`
+- `src/app/features/website/catalog/components/search-box/search-box.component.ts`
+- `src/app/features/website/catalog/components/filters-panel/filters-panel.component.ts`
+- `src/app/features/website/catalog/components/sorting-control/sorting-control.component.ts`
+
+Implemented behaviors:
+
+- live suggestions
+- recent + popular searches
+- keyboard navigation in search box (up/down/enter/escape)
+- clear search action
+- dynamic filters for checkbox, radio, toggle, range, slider, color, size, rating, availability
+- URL query synchronization with `SearchState`
+- page reload restore from query params
+
+### Validation
+
+Completed validation for Sprint 11 integration:
+
+- `npm run build` passes successfully
+- facades remain the UI data boundary
+- no authentication changes
+- no payment changes
+- no bootstrap/runtime contract changes