Introduces ai_sessions table (schema v9), AiSessionStore, and background
session support for mission interviews, planning, and subtask breakdown.
Adds BackgroundTasksIndicator component, SSE-based progress streaming,
and dashboard API routes for session management.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Extract isTaskStuck and countStuckTasks into shared utils/taskStuck.ts utility
- Replace hardcoded 10-minute threshold with project taskStuckTimeoutMs setting
- Thread taskStuckTimeoutMs from App settings fetch through ExecutorStatusBar to useExecutorStats
- Return 0 stuck tasks when timeout is undefined/0 (disabled), matching engine behavior
- Update tests to verify disabled state, custom thresholds, and zero threshold edge case
- Share task list data between footer ExecutorStatusBar and board view to ensure consistent counts
- Refactor MissionManager component with improved structure and readability
- Refactor useExecutorStats hook and simplify test coverage
- Update ExecutorStatusBar component and tests for accurate count display
- Consolidate and clean up dashboard styles.css
- Update footer status bar documentation in README
