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>

.gitignore

@@ -0,0 +1,49 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+venv/
+.venv/
+*.egg-info/
+dist/
+build/
+.pytest_cache/
+
+# Node.js
+node_modules/
+npm-debug.log
+yarn-error.log
+
+# Electron
+out/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# Environment
+.env
+.env.local
+*.local
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Whisper models (large files)
+*.pt
+*.bin
+*.onnx
+
+# Temporary files
+*.tmp
+*.temp
+*.webm
+/tmp/
+
+# Logs
+*.log
+logs/