- Link Immich albums to trips — photos sync automatically
- Album picker shows all user's Immich albums
- Linked albums displayed as chips with sync/unlink buttons
- Auto-sync on link: fetches all album photos and adds to trip
- Manual re-sync button for each linked album
- DB migration: trip_album_links table
fix: shared Immich photos visible to other trip members
- Thumbnail/original proxy now uses photo owner's Immich credentials
when userId query param is provided, fixing 404 for shared photos
- i18n: album keys for all 12 languages
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