Integrated CollisionAlert component into the main TUI application with the following features:
- Added collision alert panel to UI layout (hidden by default)
- Added 'C' keyboard shortcut to toggle collision alert view
- Added collision detection to event processing pipeline
- Collision alerts auto-update when new events are processed
- Added collision view mode with dedicated header and footer
- Updated footer to show collision shortcut in default view
- Updated help overlay with collision alert controls
- Added command palette support for 'collisions' command
- Collision alerts can be acknowledged individually or all at once
- Alerts are grouped by severity (critical/error, warning, info)
All tests pass (1046 passed, 3 skipped).
Co-Authored-By: Claude Worker <noreply@anthropic.com>