Use `last_active` from SQLite (max message timestamp) for accurate
sorting, with fallback chain: last_active → ended_at → started_at.
CLI mode lacks last_active so falls back to ended_at.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Fix chat store cache keys to include profile name, prevent data leaking between profiles
- Defer cache hydration to after profile load to avoid race condition
- Remove collapsible sidebar feature (not needed)
- Remove confirmation dialog on profile switch (direct reload)
- Auto-start gateway when creating new profile
- Clear profile-specific localStorage cache on profile delete (safe prefix matching)
- Clean up unused imports in SettingsView
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>