feat(cli): implement startup team selection dialog and UI integration

- Add TeamSelectionDialog component for team discovery UX
- Intercept startup flow in AppContainer to show team selection if needed
- Update DialogManager to orchestrate team selection UI
- Add handleTeamSelect and isTeamSelectionActive to UI contexts
- Fix pre-existing StyledLine compilation error in TableRenderer
- Refactor promptProvider-teams.test.ts to resolve type errors
- Add unit tests for TeamSelectionDialog
- Fix ESLint warnings for exhaustive-deps in AppContainer
- Resolve syntax corruptions in AppContainer.tsx and DialogManager.tsx

packages/cli/src/test-utils/render.tsx

@@ -589,6 +589,7 @@ const mockUIActions: UIActions = {
   onHintSubmit: vi.fn(),
   handleRestart: vi.fn(),
   handleNewAgentsSelect: vi.fn(),
+  handleTeamSelect: vi.fn(),
   getPreferredEditor: vi.fn(),
   clearAccountSuspension: vi.fn(),
 };