c2b1b7b751
- new app/api/routes/api/ package with shared require_session (401) and require_csrf (presence-only X-CSRF-Token, 403) dependencies - GET /api/config returns masked config sections; PUT /api/config reuses save_config_updates (blank secret keeps old; invalid -> 422, no write) - session-protected; PUT also CSRF-protected - register router in app/main.py; regenerate openapi/ - tests/test_api_config.py