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/bun.lock

@@ -3,7 +3,7 @@
   "configVersion": 1,
   "workspaces": {
     "": {
-      "name": "idfoto-extension",
+      "name": "relicario-extension",
       "devDependencies": {
         "@types/chrome": "^0.1.40",
         "copy-webpack-plugin": "^12.0",