Resolve naming collision between editorSlice and tabSlice. Both slices defined closeTab and setActiveTab, and since editorSlice was spread last in the store composition, it silently overwrote the tabSlice methods, breaking tab management.
- Backend: ProjectFileService with file CRUD, search, git status, file watcher - IPC: 12 editor channels with security validation and path containment - Store: editorSlice with multi-tab management, draft persistence, conflict detection - UI: CodeMirror 6 editor, file tree with DnD, search-in-files, context menus - Move: fs.rename with EXDEV fallback, full path remapping across all caches - Tests: comprehensive coverage for services, IPC handlers, store, and utilities
