- Add a shared AiSessionSync store with BroadcastChannel + storage fallback, ownership locks, heartbeats, and stale-tab detection
- Merge cross-tab session snapshots into useBackgroundSessions with timestamp guards and rebroadcast SSE updates to peers
- Update background session UI and planning/mission/subtask modals to show active-tab lock status and only allow takeover when ownership is stale
- Add hook tests covering sync store messaging/fallback behavior and background session cross-tab merge flows
- Extend mobile CSS for SettingsModal, AgentsView, ExecutorStatusBar, ActiveAgentsPanel, toast placement, and background task popovers
- Rename BackgroundTasksIndicator list/item class hooks to align with the updated responsive styling contract
- Add focused component tests covering settings, agents, and utility mobile adaptations plus key CSS media-rule assertions
- Document mobile component adaptation behavior and testing guidance in the dashboard README
- Replace inline styles in BackgroundTasksIndicator with semantic class names for pill, popover, and session rows
- Add dedicated styles for attention state, hover behavior, and muted text/border theme tokens
- Style session content, icons, and dismiss controls in styles.css to centralize indicator presentation
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>
