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