* feat: track and prune open files in FilesView
Add openFiles state to manage currently opened file tabs
Prune open files when a file is renamed or deleted to keep in sync
Reset openFiles on refresh and clear file content when selection changes
* style: improve file dropdown layout and truncation
Adjust button layout to allow long file names to truncate correctly
Keep dropdown arrow visible while resizing by preventing shrink
Add a centralized useEffectiveDirectory hook to resolve the active directory
Use the hook across DiffView, FilesView, GitView, and TerminalView
Fix list styling by rendering ul/ol bullets outside
* feat: add plan/build mode switching and Plan view tab
Add PlanView view and integrate plan tab into main layout
Introduce plan_enter and plan_exit tools with icons and status strings
Persist per-session agent selections in context to reduce UI flicker during mode switches
* feat: enchanced plan discovery checks in header and plan view
* fix(ui): align PlanView and Header with sessionDirectory logic
Remove dependency on context store in header and compute sessionDirectory from session or currentDirectory
Compute display and repo paths using sessionDirectory for PlanView and update path resolution
Poll plan content every 3 seconds to reflect changes without heavy retries
* feat(ui): improve header tab switching and add copy buttons for plan
Switch header tab navigation to central UI store and auto-switch when plan is unavailable
Show checkmark icon after copying file contents or path with auto-hide timeout
Extend plan view path resolution to prefer session directory when present
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
- Added CodeMirror editor for file content editing in FilesView.
- Introduced draft saving functionality with unsaved changes confirmation dialog.
- Implemented file writing API to persist changes to the filesystem.
- Enhanced language support for syntax highlighting based on file extensions.
- Updated UI components to support new editing features, including save and discard options.
- Refactored line selection logic for improved user experience on both desktop and mobile.
- Added new utility functions for language detection by file extension.
- Introduced a new theme for CodeMirror to align with the application's design.
* 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