feat(catalog): sprint 10.2 ux responsive empty-states polish

docs/Catalog-Module-Report.md

@@ -146,3 +146,72 @@ npm run build
 ## Stop Point
 
 Catalog Module implementation is complete for Sprint 5. Stop here for approval before starting the next module or any Builder/Backoffice work.
+
+## Sprint 10.2 Catalog UX Polish
+
+Sprint 10.2 improves catalog UX and responsiveness without changing facades, business logic, bootstrap flow, runtime architecture, routing, authentication, or payment.
+
+### Empty State Behavior
+
+Two separate states are now rendered in the catalog container:
+
+- Empty category state (`rawProducts.length === 0`):
+	- hides filter/sort/layout/result controls
+	- shows dedicated empty category component with icon, category context, friendly message, and "Browse Categories" action
+- Filtered empty state (`rawProducts.length > 0 && products.length === 0`):
+	- shows "no filter match" message
+	- provides "Clear Filters" action
+	- keeps filter access available (sidebar on desktop, drawer trigger on tablet/mobile)
+
+### Mobile Filter Drawer
+
+- Desktop keeps visible sticky sidebar filters.
+- Tablet and mobile switch to a drawer-based filter UI.
+- Drawer includes filter groups, Reset, and Apply actions.
+- Apply closes the drawer.
+- Accessibility:
+	- drawer uses dialog semantics (`role="dialog"`, `aria-modal="true"`)
+	- focus trap is enabled while drawer is open
+	- `Esc` closes the drawer
+
+### Mobile Sort
+
+- Desktop keeps dropdown sort control.
+- Tablet keeps compact dropdown with drawer-based filters.
+- Mobile opens a bottom-sheet sort modal.
+- Supported mobile sort options:
+	- Recommended
+	- Newest
+	- Price Low -> High
+	- Price High -> Low
+	- Rating
+	- Popularity
+
+### Responsive Grid Modes and Toolbar
+
+- Grid selector uses icon buttons and keeps active-state highlighting.
+- Mobile sticky toolbar added with quick actions:
+	- Filters
+	- Sort
+	- Grid cycle
+- Grid cycle rotates through supported layouts while preserving existing layout architecture.
+
+### Responsive Spacing and Overflow
+
+Catalog spacing and controls were polished for desktop/tablet/mobile:
+
+- filter/input/button spacing
+- sort/reset row behavior (single row on desktop, stacked naturally on mobile)
+- card and grid spacing
+- search block spacing
+- drawer/sheet interaction surfaces
+- horizontal overflow prevention
+
+### Localization and Accessibility
+
+- New strings for empty states, drawer/sheet UI, and toolbar were added to all languages:
+	- `src/app/i18n/en.ts`
+	- `src/app/i18n/ru.ts`
+	- `src/app/i18n/hy.ts`
+	- `src/app/i18n/translations.ts`
+- No hardcoded catalog UX strings were introduced for Sprint 10.2 additions.