feat(phase7.2): media browser with server-side filters + pagination
- Migration 052: indexes on media_assets(asset_type, created_at) and
products(category_key, lagertyp) for efficient filter queries
- GET /api/media/assets: JOINs media_assets→products→order_lines,
filters by asset_type / category_key / render_status / q (ILIKE),
paginated (page/page_size), returns total+pages count
- New schemas: MediaAssetBrowseItem, MediaAssetBrowseResponse
- frontend/src/api/media.ts: getMediaAssets(filters), typed interfaces
- MediaBrowser.tsx: rewritten with sticky filter bar (debounced search,
type/category/status dropdowns), responsive grid, image previews,
download buttons, pagination footer with page size selector
- Renamed legacy function to listMediaAssets for backward compat
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Hartmut
c99976cc85