Large albums opened slowly and flickered; the default album cover was
also lost in the media-objects refactor.
Large-album loading:
- quantize signed object URLs within a window and send Cache-Control so
previews are reused instead of re-fetched
- publish photo.updated (not photo.created) when variants are ready, so
clients update in place without reordering the grid
- worker concurrency + newest-first variant priority; raise default batch
Album cover:
- first uploaded photo becomes the cover when none is set
- clear the cover when the cover photo is trashed or moved out
- "set as album cover" in the photo context menu and actions panel
OpenSpec changes: fix-large-album-load, fix-album-cover
Move physical file facts out of the photos table into an objects ledger:
- objects / photo_objects / variant_jobs tables (migration 000008)
- drop storage_key/thumb_key/preview_key/size/width/height/mime_type from
photos (migration 000009); they are derived via joins to the original object
- album-free storage keys: objects/{id}/{role}.{ext}
- explicit GC via pending/ready/deleting states; objects deleted only when no
photo references them
- background worker drives variant generation (durable variant_jobs) and GC
- copy/move are metadata-only; storage objects are shared between photos
- remove unused storage.DeletePrefix
Non-destructive to the external JSON API: size/dimensions/mime and URLs are
still returned, just sourced from the object layer.
OpenSpec change: media-object-layer
iu