Smart previews always lived in <library>/Smart Previews, so a large set of proxies
filled the library's drive. The folder is now a per-library setting (prefs.json):
- library.smartPreviewsLocation shows the effective folder (path, count, size,
availability) or changes it; changing it needs an explicit choice for the
previews already built (move, leave or discard), and reset returns to the
library's own folder.
- The new folder must accept writes before anything moves. A folder whose parent
is missing (an unplugged drive) is an error and is never created on the current
drive; building also refuses while a chosen folder is unavailable.
- Building, discarding, status and offline rendering all use the chosen folder.
- Settings -> Performance -> Smart previews shows the path before building, what
it holds, the existing-previews choice, Choose Folder... and Use Library Folder.
The thumbnail cache stays in the library.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
- Smart previews (smart.rs): a ~1 MB proxy per photo in the library's "Smart Previews" folder
(the decoded preview-size source, scaled, sRGB-encoded JPEG behind a one-line header). When
a photo's original is missing (an unplugged drive), its source loads from the proxy: the
photo renders, edits and exports at proxy size. library.smartPreviews {discard?},
photo.smartPreview status; File ▸ Previews ▸ Build / Discard Smart Previews; Info shows
"Original offline · editing the smart preview".
- Photo ▸ Duplicate (photo.duplicate): a real "-copy" file with the same settings, metadata,
rating, flag, label and albums; one undo step.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
library.buildPreviews {size: standard (Settings → Performance preview size) | full, ids?,
wait?} renders each photo's grid thumbnail and loupe view into the memory + disk preview cache
(selected photos, else all in view) on a background thread; library.previewProgress /
cancelPreviews. File ▸ Previews: Build Standard-Sized / 1:1, Stop, Discard Preview Cache;
toasts when a build starts and finishes. Also silences the wasm-only unused `threads` warning.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
