- Create ErrorBoundary and ModalErrorBoundary components with recovery actions (retry, reload)
- Add error boundary CSS styles with fallback UI styling
- Wrap main dashboard pages (Board, List, Settings, Agents) with PageErrorBoundary in App.tsx
- Wrap all key modals (task detail, planning, subtask breakdown, mission) with ModalErrorBoundary in AppModals.tsx
- Wrap entire App with RootErrorBoundary in main.tsx as final safety net
- Add 11 comprehensive ErrorBoundary tests covering all rendering and error scenarios
- 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
