feat(#52): implement Active Projects & Agent Chains widget
Add HUD widget for tracking active projects and running agent sessions.
Backend:
- Add getActiveProjectsData() and getAgentChainsData() to WidgetDataService
- Create POST /api/widgets/data/active-projects endpoint
- Create POST /api/widgets/data/agent-chains endpoint
- Add WidgetProjectItem and WidgetAgentSessionItem response types
Frontend:
- Create ActiveProjectsWidget component with dual panels
- Active Projects panel: name, color, task/event counts, last activity
- Agent Chains panel: status, runtime, message count, expandable details
- Real-time updates (projects: 30s, agents: 10s)
- PDA-friendly status indicators (Running vs URGENT)
Testing:
- 7 comprehensive tests covering loading, rendering, empty states, expandability
- All tests passing (7/7)
Refs #52
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Jason Woltje
4c3604e85c