refactor(ext/popup): remove last @ts-nocheck, align to typed-item types

Clears the final four transitional @ts-nocheck shields:
- popup.ts (already mostly updated in Slice 6 prior tasks; nocheck just
  removed and the init fallback switched to list_items / ItemId typing)
- unlock.ts (list_entries → list_items; ManifestEntry typing)
- settings.ts (RelicarioSettings → DeviceSettings; pure type rename, UX
  unchanged)

Also drops the stale `idfoto-extension` name in bun.lock (workspace was
renamed; lock file still carried the old name).

Verification:
  git grep -n '@ts-nocheck' extension/src/  → 0 hits
  bun run build + build:firefox             → both green
  bun run test                              → 52/52 passing
  cargo test --workspace                    → green

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extension/src/popup/popup.ts

@@ -1,4 +1,3 @@
-// @ts-nocheck — transitional: downstream files updated in Slice 6 (item-* rewrites) / Slice 4 (vitest setup) / Slice 5 (content + setup rewires)
 /// Popup entry point — state machine with view routing.
 ///
 /// Views: setup | locked | list | detail | add | edit