- Add ChatView component with sidebar navigation and message thread layout
- Add useChat hook with SSE streaming state management for real-time updates
- Add chat API functions for sessions and messages (create, list, send, stream)
- Add mobile-responsive CSS styles for chat interface
- Add tests for useChat hook and ChatView component
- Integrate chat into task view and navigation (Header, MobileNavBar)
- Extend dashboard task view state and nav controls to include a persistent missions view toggle
- Render MissionManager inline in App project content and route mission/session navigation into the missions view
- Remove modal-based mission wiring from AppModals and useModalManager now that missions are no longer a modal
- Add inline MissionManager styling and update App/Header/tablet tests for the new missions navigation behavior
- Extract view state, project actions, and task handler concerns from AppInner into dedicated hooks
- Add AppModals component to centralize modal rendering and related props wiring
- Inline thin aliases and complete AppInner cleanup after moving responsibilities out
- Add unit tests for useViewState, useProjectActions, and useTaskHandlers hooks
