feat: add album generation system to skeleton
Adds anchor-based image album generation across docs, skeleton, and rendered
full-monorepo. One subject description + one anchor image + N directed shots,
covering personas, products, characters, and brand assets out of the box.
## What ships
**Skeleton packages:**
- pkg/album/types.go — Album, Shot, ShotStatus, ShotTemplate, AlbumUpdater
- pkg/album/templates.go — PortraitSession, ProductShoot, CharacterSheet built-ins
- pkg/album/handler.go — AnchorHandler + ShotHandler queue job handlers
- packages/realtime/src/useAlbumGeneration.ts — SSE hook owning all album state
- packages/ui/src/components/AlbumGrid.tsx — responsive shot grid with shimmer
- packages/ui/src/components/ShotCard.tsx — pending/generating/complete/failed states
- packages/ui/src/components/AnchorPreview.tsx — anchor CTA + image with controls
**Component service template:**
- internal/port/album.go — AlbumRepository interface
- internal/adapter/memory/album.go — in-memory repo for standalone dev
- internal/service/album.go — create, list, get, generateAnchor, generateAllShots
- internal/api/handlers/album.go — HTTP handlers (CRUD + 202 generation endpoints)
- Routes: GET/POST /albums, GET/DELETE /albums/{id}, POST /albums/{id}/anchor,
POST/DELETE /albums/{id}/shots, POST /albums/{id}/shots/{index}
**Documentation:**
- .claude/guides/album.md — full guide with API, SSE events, frontend usage
**Key architecture decisions:**
- Anchor bytes never stored in queue payload — workers fetch AnchorURL at runtime
- Generation order enforced: POST /shots returns 422 if no anchor exists
- All album SSE events on existing user:<userId> channel (no new channel)
- AlbumUpdater interface lets job handlers update repo from inside queue workers
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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