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/.gitignore

@@ -1,8 +1,30 @@
+# Dependencies (rebuilt via `npm ci` from package-lock.json)
 node_modules/
+
+# Build outputs
 dist/
 src-tauri/target/
+
+# TypeScript incremental build info (`tsc -b`)
+*.tsbuildinfo
+
+# Tauri generated files (tauri-build emits schemas/capabilities here on every build)
+src-tauri/gen/
+
+# Stale emitted copies of vite.config.ts — the .ts file is the source of truth.
+# Vite resolves .js before .ts, so an emitted copy would silently shadow it.
+vite.config.js
+vite.config.d.ts
+
+# Python / speech engine (rebuilt via `python -m venv .venv && pip install -r requirements.txt`)
 speech-engine/.venv/
 speech-engine/__pycache__/
-.env
+__pycache__/
 *.pyc
+
+# Environment & secrets — never commit
+.env
+
+# OS / editor noise
 .DS_Store
+Thumbs.db