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

src/dashboard/templates/base.html

@@ -24,8 +24,9 @@
       <a href="/briefing" class="mc-test-link">BRIEFING</a>
       <a href="/swarm/live" class="mc-test-link">SWARM</a>
       <a href="/marketplace/ui" class="mc-test-link">MARKET</a>
+      <a href="/tools" class="mc-test-link">TOOLS</a>
       <a href="/mobile" class="mc-test-link">MOBILE</a>
-      <a href="/mobile-test" class="mc-test-link">TEST</a>
+      <button id="enable-notifications" class="mc-test-link" style="background:none;border:none;cursor:pointer;" title="Enable notifications">🔔</button>
       <span class="mc-time" id="clock"></span>
     </div>
   </header>
@@ -44,5 +45,6 @@
     updateClock();
   </script>
   <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc4s9bIOgUxi8T/jzmE6bgx5xwkVYG3WhIEOFSjBqg4X" crossorigin="anonymous"></script>
+  <script src="/static/notifications.js"></script>
 </body>
 </html>