Add Phase 0 test harness (vitest + ESLint) and fix build config

- Add vitest unit tests for Zustand app store state transitions (6 tests)
- Add mock speech-engine WebSocket protocol integration test (spawns server.py --mock on a free port)
- Add ESLint 10 flat config with typescript-eslint; add typecheck/lint/test scripts to package.json
- Fix pre-existing tsc -b breakage via noEmit in tsconfig.node.json; add dedicated tsconfig.tests.json project for Node-side tests
- Track src-tauri/Cargo.lock for reproducible Rust builds; enable protocol-asset Tauri feature
- Ignore generated artifacts (*.tsbuildinfo, src-tauri/gen/, emitted vite.config.js/.d.ts); remove stale emitted vite config copies
- Update AGENTS.md agent guide (demo scope lock, roadmap, verification commands)
- Add HANDOFF.md documenting Phase 0 state and remaining steps for the next agent

Wireframes/Desktop/MeetVault-Desktop-Demo/package.json

@@ -10,7 +10,11 @@
     "tauri": "tauri",
     "desktop": "tauri dev",
     "speech": "python speech-engine/server.py",
-    "speech:mock": "python speech-engine/server.py --mock"
+    "speech:mock": "python speech-engine/server.py --mock",
+    "typecheck": "tsc -b",
+    "lint": "eslint .",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "@tauri-apps/api": "^2.0.0",
@@ -23,11 +27,17 @@
     "zustand": "^5.0.2"
   },
   "devDependencies": {
+    "@eslint/js": "^10.0.1",
     "@tauri-apps/cli": "^2.0.0",
+    "@types/node": "^26.6.4",
     "@types/react": "^18.3.18",
     "@types/react-dom": "^18.3.5",
     "@vitejs/plugin-react": "^4.3.4",
+    "eslint": "^10.12.0",
+    "eslint-plugin-react-hooks": "^7.1.1",
     "typescript": "~5.6.2",
-    "vite": "^6.0.5"
+    "typescript-eslint": "^8.71.0",
+    "vite": "^6.0.5",
+    "vitest": "^3.2.7"
   }
 }