- Add showQuickChatFAB boolean setting to ProjectSettings type
- Add useAppSettings hook function for accessing the setting
- Wire QuickChatFAB visibility in App.tsx based on setting
- Hide QuickChatFAB in MobileNavBar when setting is false
- Add Settings UI toggle for the new setting
- Add CSS for hiding QuickChatFAB on mobile when disabled
- Add comprehensive tests for all affected components
- Fix QuickChatFAB onOpenChange test to use controlled mode
- Update settings reference documentation
- Add QuickChatFAB component with agent selection, conversation loading, and inline send actions
- Support panel open/close interactions including close button, Escape key, and outside-click dismissal
- Integrate the quick chat FAB into App so it appears in project view with project-scoped API calls
- Add comprehensive QuickChatFAB tests and style rules for FAB, chat panel, message bubbles, and responsive behavior
