* fix(ui): remove fixed sessions button and mac titlebar coupling
Remove fixed sessions button from header on desktop Mac
Eliminate Mac titlebar spacer and drag-to-dock logic in sidebar
Update layout to rely on standard header/sidebar without mac-specific tweaks
* feat: improve mobile header with session toggle and back button
Add back button in mobile header to exit session switcher
Show Sessions label when session switcher is open in mobile header
Toggle between opening sessions and back navigation based on session state
Add file management API and UI components
Implement directory listing, search and CRUD operations in desktop backend
Expose new Files API on frontend to list, search, and modify files
* feat: add Files tab for browsing workspace files
- Add Files tab between Diff and Terminal in header
- Implement hierarchical file tree with expand/collapse
- Add fuzzy search with debouncing and relevance ranking
- Support gitignore filtering via `git check-ignore` (web + desktop)
- Add syntax highlighting for 150+ file types
- Add image preview (SVG, PNG, JPG, etc.)
- Add line numbers, wrap toggle, and copy button
- Desktop: split-pane layout matching DiffView
- Mobile: drill-in navigation with full-width sidebar
- Update help dialog with Cmd+3 shortcut
- Increase header breakpoint to 940px for new tab
* feat: enhance context and session stores to track agent/model/variant choices for historical sessions
* feat: implement line selection and commenting functionality in FilesView
Change Keyboard Shortcuts dialog shortcut from Cmd+H to Cmd+.
Update memory debug shortcut from Cmd+Shift+M to Cmd+Shift+D
Modify model selector shortcut to use Cmd+Shift+M
* feat(ui): update keyboard shortcuts to use platform-appropriate modifier keys
* fix(macos): update keyboard shortcuts to use Cmd modifier
Change Command Palette shortcut from Ctrl+X to Cmd+K
Update all menu shortcuts to use Cmd instead of Ctrl on macOS
* Fix linter issue
Bohdan Triapitsyn