feat: Enhance hook management and session handling

- Update hook model to include last_triggered_at field.
- Modify API endpoints to support updating hooks with new fields.
- Implement session management UI improvements with toggle functionality.
- Add new JavaScript functions for better session detail visibility.
- Refactor hook storage logic to handle last triggered timestamps.
- Introduce new favicon and logo for branding.
- Update styles for improved layout and user experience.
- Enhance tests to cover new functionality and ensure reliability.

.gitignore

@@ -10,3 +10,4 @@ __pycache__/
 pytestcache/
 .coverage
 htmlcov/
+data/hooks.json