Implemented and verified.

1. **Part 1: Confirmed Bug Fixes**
   1. Fix A applied in [pixgraph.py](C:/sd/latticesearch/pixgraph.py): clamped `img_embs.npy` / `img_paths.json` immediately after load.
   2. Fix B applied in [pixgraph.py](C:/sd/latticesearch/pixgraph.py): clamped `tile_embs.npy` / `tile_paths.json` before tile similarity matmul/indexing.
   3. Fix C applied in [pixgraph.py](C:/sd/latticesearch/pixgraph.py): clamped `aud_embs.npy` / `aud_paths.json` before audio similarity pass.
   4. Fix D applied in [memory_lattice.py](C:/sd/latticesearch/memory_lattice.py): added cross-process `.mem.lock` using `O_CREAT|O_EXCL`, stale reclaim after 60s, retry loop, and `try/finally` release around the full load/mutate/write sections of `store()` and `forget()`. `recall()` remains lock-free.

2. **Part 2: GUI/UX Polish**
   1. Added delayed preview skeleton and preview fetch failure toast.
   2. Added immediate disable/text/toast feedback for backup create, restore, and verify.
   3. Added immediate disable/text/toast feedback for sync pair, status preview, and sync.
   4. Added immediate disable/text/toast feedback for dedup scan/apply.
   5. Improved vault create button busy text while preserving existing `confirmDialog()`.
   6. Added faces loading state, person loading state, empty person state, and failure toasts.
   7. Added empty state for similar search with no matches.
   8. Added fetch failure toasts for file analysis, audio search, similar search, and folder activity.
   9. Escape now closes preview drawer, modal, lightboxes, chat, recent palette, and menus.
   10. Added `aria-label`/titles to icon-only controls found in the touched UI paths.
   11. Raw `confirm()` migration: none found.
   12. Skipped broad conversion of intentional silent polling/optional fetches, such as health/status polling and lightweight count/prefs fallbacks, because surfacing those as toasts would create noisy UX and risk changing intended behavior.

3. **Verification**
   1. Python AST check: `py ok`
   2. UI script parse check: `ui ok`

There was a non-fatal JavaScript `SyntaxWarning` from the existing script text during Node parsing, but the required command still completed and printed `ui ok`.