feat: swarm E2E, MCP tools, timmy-serve L402, tests, notifications

Major Features:
- Auto-spawn persona agents (Echo, Forge, Seer) on app startup
- WebSocket broadcasts for real-time swarm UI updates
- MCP tool integration: web search, file I/O, shell, Python execution
- New /tools dashboard page showing agent capabilities
- Real timmy-serve start with L402 payment gating middleware
- Browser push notifications for briefings and task events

Tests:
- test_docker_agent.py: 9 tests for Docker agent runner
- test_swarm_integration_full.py: 18 E2E lifecycle tests
- Fixed all pytest warnings (436 tests, 0 warnings)

Improvements:
- Fixed coroutine warnings in coordinator broadcasts
- Fixed ResourceWarning for unclosed process pipes
- Added pytest-asyncio config to pyproject.toml
- Test isolation with proper event loop cleanup

pyproject.toml

@@ -78,6 +78,7 @@ include = [
 testpaths = ["tests"]
 pythonpath = ["src"]
 asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "function"
 addopts = "-v --tb=short"
 
 [tool.coverage.run]