Extends the heap-only "move to folder" action to grid single/bulk
selections, sidebar folders, and an `m` keyboard shortcut — all through
one shared dialog driven by a moveDialog store.
Backend (sidecar):
- Extract the heap move/copy + reindex loop into a reusable movePhotoFiles
helper plus resolveMoveTarget
- POST /photos/move: move/copy an arbitrary UID list into a folder
- POST /folders/:rel/move: reparent a folder dir (whole subtree) under a
new parent, guarding against moving into itself/a descendant
Frontend:
- moveDialog store + generalized MoveToFolderDialog (heap | photos | folder
subjects); mounted once in +layout.svelte. Replaces HeapConvertDialog
- movePhotosToFolder / moveFolder service fns
- Entry points: BulkActionBar button, gridKeyNav `m`, FolderTree kebab,
heap kebab — all call openMove()
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
