feat: Meeting Assistant MVP - Complete implementation

Enterprise Meeting Knowledge Management System with:

Backend (FastAPI):
- Authentication proxy with JWT (pj-auth-api integration)
- MySQL database with 4 tables (users, meetings, conclusions, actions)
- Meeting CRUD with system code generation (C-YYYYMMDD-XX, A-YYYYMMDD-XX)
- Dify LLM integration for AI summarization
- Excel export with openpyxl
- 20 unit tests (all passing)

Client (Electron):
- Login page with company auth
- Meeting list with create/delete
- Meeting detail with real-time transcription
- Editable transcript textarea (single block, easy editing)
- AI summarization with conclusions/action items
- 5-second segment recording (efficient for long meetings)

Sidecar (Python):
- faster-whisper medium model with int8 quantization
- ONNX Runtime VAD (lightweight, ~20MB vs PyTorch ~2GB)
- Chinese punctuation processing
- OpenCC for Traditional Chinese conversion
- Anti-hallucination parameters
- Auto-cleanup of temp audio files

OpenSpec:
- add-meeting-assistant-mvp (47 tasks, archived)
- add-realtime-transcription (29 tasks, archived)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

DEPLOYMENT.md

@@ -0,0 +1,177 @@
+# Meeting Assistant Deployment Guide
+
+## Prerequisites
+
+- Python 3.10+
+- Node.js 18+
+- MySQL 8.0+
+- Access to Dify LLM service
+
+## Backend Deployment
+
+### 1. Setup Environment
+
+```bash
+cd backend
+
+# Create virtual environment
+python -m venv venv
+source venv/bin/activate  # Linux/Mac
+# or: venv\Scripts\activate  # Windows
+
+# Install dependencies
+pip install -r requirements.txt
+```
+
+### 2. Configure Environment Variables
+
+```bash
+# Copy example and edit
+cp .env.example .env
+
+# Edit .env with actual values:
+# - DB_HOST, DB_PORT, DB_USER, DB_PASS, DB_NAME
+# - AUTH_API_URL
+# - DIFY_API_URL, DIFY_API_KEY
+# - ADMIN_EMAIL
+# - JWT_SECRET (generate a secure random string)
+```
+
+### 3. Run Server
+
+```bash
+# Development
+uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
+
+# Production
+uvicorn app.main:app --host 0.0.0.0 --port 8000 --workers 4
+```
+
+### 4. Verify Deployment
+
+```bash
+curl http://localhost:8000/api/health
+# Should return: {"status":"healthy","service":"meeting-assistant"}
+```
+
+## Electron Client Deployment
+
+### 1. Setup
+
+```bash
+cd client
+
+# Install dependencies
+npm install
+```
+
+### 2. Development
+
+```bash
+npm start
+```
+
+### 3. Build for Distribution
+
+```bash
+# Build portable executable
+npm run build
+```
+
+The executable will be in `client/dist/`.
+
+## Transcription Sidecar
+
+### 1. Setup
+
+```bash
+cd sidecar
+
+# Create virtual environment
+python -m venv venv
+source venv/bin/activate
+
+# Install dependencies
+pip install -r requirements.txt
+pip install pyinstaller
+```
+
+### 2. Download Whisper Model
+
+The model will be downloaded automatically on first run. For faster startup, pre-download:
+
+```python
+from faster_whisper import WhisperModel
+model = WhisperModel("small", device="cpu", compute_type="int8")
+```
+
+### 3. Build Executable
+
+```bash
+python build.py
+```
+
+The executable will be in `sidecar/dist/transcriber`.
+
+### 4. Package with Electron
+
+Copy `sidecar/dist/` to `client/sidecar/` before building Electron app.
+
+## Database Setup
+
+The backend will automatically create tables on first startup. To manually verify:
+
+```sql
+USE db_A060;
+SHOW TABLES LIKE 'meeting_%';
+```
+
+Expected tables:
+- `meeting_users`
+- `meeting_records`
+- `meeting_conclusions`
+- `meeting_action_items`
+
+## Testing
+
+### Backend Tests
+
+```bash
+cd backend
+pytest tests/ -v
+```
+
+### Performance Verification
+
+On target hardware (i5/8GB):
+1. Start the Electron app
+2. Record 1 minute of audio
+3. Verify transcription completes within acceptable time
+4. Test AI summarization with the transcript
+
+## Troubleshooting
+
+### Database Connection Issues
+
+1. Verify MySQL is accessible from server
+2. Check firewall rules for port 33306
+3. Verify credentials in .env
+
+### Dify API Issues
+
+1. Verify API key is valid
+2. Check Dify service status
+3. Review timeout settings for long transcripts
+
+### Transcription Issues
+
+1. Verify microphone permissions
+2. Check sidecar executable runs standalone
+3. Review audio format (16kHz, 16-bit, mono)
+
+## Security Notes
+
+- Never commit `.env` files
+- Keep JWT_SECRET secure and unique per deployment
+- Ensure HTTPS in production
+- Regular security updates for dependencies