- New watcher.py: polls WATCH_DIR, enqueues transcription+summary via Celery.
- New process_watch_file_task in tasks.py.
- Updated __main__.py: WebUI always runs; MCP and watcher run in parallel when enabled.
- New mcp_server.py: FastAPI app for LLMs to upload audio and get transcript JSON.
- Added process_mcp_transcribe_task Celery task.
- Updated __main__.py: WebUI always runs; MCP server runs in parallel when MCP_SERVER_ENABLED=true.