Build Wisp: on-device transcription studio (web + native, one codebase)

Private, offline speech-to-text that runs Whisper on the user's own device —
free, no account, no per-minute fees. Replaces Otter.ai / Rev.

- Pure, tested engine: chunking, overlap timestamp-stitching, exports
  (SRT/VTT/TXT/MD/JSON), WAV codec, resampler, job queue, model catalog (142 tests).
- Platform-abstracted TranscriptionEngine: transformers.js on web (loaded from
  CDN at runtime to dodge Metro's onnxruntime-web bundling limits), whisper.rn
  on native. Shared pipeline orchestrates decode -> chunk -> transcribe -> stitch.
- Cross-platform StorageRepo (Dexie web / expo-sqlite native), Zod-validated.
- UI: library + search, import, live-progress transcription, synced click-to-seek
  editor, multi-format export; model picker + privacy in settings.
- Web ships as a single-page PWA with COOP/COEP isolation for threaded WASM;
  Docker (nginx) image + Traefik compose for wisp.briggen.dev.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -4,15 +4,19 @@
   "version": "1.0.0",
   "dependencies": {
     "@expo/ui": "~56.0.17",
+    "@huggingface/transformers": "^4.2.0",
+    "dexie": "^4.4.3",
     "expo": "~56.0.11",
     "expo-constants": "~56.0.18",
     "expo-device": "~56.0.4",
+    "expo-document-picker": "^56.0.4",
     "expo-font": "~56.0.6",
     "expo-glass-effect": "~56.0.4",
     "expo-image": "~56.0.11",
     "expo-linking": "~56.0.14",
     "expo-router": "~56.2.10",
     "expo-splash-screen": "~56.0.10",
+    "expo-sqlite": "^56.0.5",
     "expo-status-bar": "~56.0.4",
     "expo-symbols": "~56.0.6",
     "expo-system-ui": "~56.0.5",
@@ -25,18 +29,29 @@
     "react-native-safe-area-context": "~5.7.0",
     "react-native-screens": "4.25.2",
     "react-native-web": "~0.21.0",
-    "react-native-worklets": "0.8.3"
+    "react-native-worklets": "0.8.3",
+    "whisper.rn": "^0.6.0",
+    "zod": "^4.4.3",
+    "zustand": "^5.0.14"
   },
   "devDependencies": {
+    "@types/node": "^25.9.3",
     "@types/react": "~19.2.2",
-    "typescript": "~6.0.3"
+    "fake-indexeddb": "^6.2.5",
+    "fast-check": "^4.8.0",
+    "typescript": "~6.0.3",
+    "vitest": "^4.1.8"
   },
   "scripts": {
     "start": "expo start",
-    "reset-project": "node ./scripts/reset-project.js",
     "android": "expo start --android",
     "ios": "expo start --ios",
     "web": "expo start --web",
+    "export:web": "expo export --platform web",
+    "prebuild:android": "expo prebuild --platform android --no-install",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "typecheck": "tsc --noEmit",
     "lint": "expo lint"
   },
   "private": true