feat(summary): update implementation status and add completed phases

src/Griddy/plan.md

@@ -1193,11 +1193,117 @@ The grid follows WAI-ARIA grid pattern:
 
 ---
 
+---
+
+## Phase 10: Future Enhancements
+
+### Data & State Management
+- [ ] **Column layout persistence** - Save/restore column order, widths, visibility to localStorage
+- [ ] **Sort/filter state persistence** - Persist column filters and sorting state
+- [ ] **Undo/redo for edits** - Ctrl+Z/Ctrl+Y for edit history with state snapshots
+- [ ] **RemoteServerAdapter class** - Formal adapter pattern for server data (currently using callbacks)
+- [ ] **Error boundary** - Graceful error handling for data fetch failures
+- [ ] **Loading states UI** - Skeleton loaders and shimmer effects during data fetch
+
+### Advanced Data Features
+- [ ] **Tree/hierarchical data** - Parent-child rows with expand/collapse (nested data structures)
+- [ ] **Master-detail rows** - Expandable detail panels per row with custom content
+- [ ] **Bulk operations** - Multi-row edit, bulk delete with confirmation
+- [ ] **Smart column types** - Auto-detect date, number, email columns from data
+- [ ] **Copy/paste support** - Clipboard integration (Ctrl+C/Ctrl+V) for cells and rows
+
+### Editing Enhancements
+- [ ] **Validation system** - Validate edits before commit (min/max, regex, custom validators)
+- [ ] **Tab-to-next-editable-cell** - Navigate between editable cells with Tab key
+- [ ] **Inline validation feedback** - Show validation errors in edit mode
+- [ ] **Custom cell renderers** - Support for charts, progress bars, badges, images
+
+### Filtering & Search
+- [ ] **Quick filters** - Dropdown filters in headers (Excel-style column filters)
+- [ ] **Advanced search** - Multi-column search with boolean operators
+- [ ] **Filter presets** - Save and load filter combinations
+- [ ] **Search history** - Recent searches dropdown
+
+### Export & Import
+- [ ] **Export to CSV/Excel** - Download current view with filters/sorts applied (load all data)
+- [ ] **Export selected rows** - Export only selected rows
+- [ ] **Import from CSV** - Bulk data import with validation
+- [ ] **PDF export** - Generate PDF reports from grid data
+
+### UI/UX Improvements
+- [ ] **Context menu enhancements** - Right-click menu for pin/hide/group/freeze operations
+- [ ] **Keyboard shortcuts help** - Modal overlay showing available shortcuts (Ctrl+?)
+- [ ] **Column auto-sizing** - Double-click resize handle to fit content
+- [ ] **Mobile/touch support** - Touch gestures for scroll, select, swipe actions
+- [ ] **Responsive columns** - Hide/show columns based on viewport width
+- [ ] **Theme presets** - Built-in light/dark/high-contrast themes
+
+### Performance & Optimization
+- [ ] **Column virtualization** - Horizontal virtualization for 100+ columns
+- [ ] **Row virtualization improvements** - Variable row heights, smoother scrolling
+- [ ] **Performance benchmarks** - Document render time, memory usage, FPS
+- [ ] **Lazy loading images** - Load images as rows scroll into view
+- [ ] **Web Worker support** - Offload sorting/filtering to background thread
+
+### Accessibility & Testing
+- [ ] **Accessibility improvements** - Enhanced ARIA roles, screen reader announcements
+- [ ] **Accessibility audit** - WCAG 2.1 AA compliance verification
+- [ ] **E2E test suite** - Playwright tests for all features (expand from current filtering tests)
+- [ ] **Visual regression tests** - Screenshot comparison tests
+- [ ] **Performance tests** - Automated performance benchmarking
+
+### Developer Experience
+- [ ] **Plugin architecture** - Extensibility system for custom features
+- [ ] **Custom hooks** - useGriddyTable, useGriddySelection, useGriddyFilters
+- [ ] **TypeDoc documentation** - Auto-generated API docs
+- [ ] **Migration guide** - Gridler → Griddy migration documentation
+- [ ] **CodeSandbox examples** - Live playground with all features
+- [ ] **Storybook controls** - Interactive prop controls for all stories
+
+### Advanced Features
+- [ ] **Cell-level focus** - Left/right arrow navigation between cells
+- [ ] **Row reordering** - Drag-and-drop to reorder rows
+- [ ] **Frozen rows** - Pin specific rows at top/bottom
+- [ ] **Column spanning** - Cells that span multiple columns
+- [ ] **Row spanning** - Cells that span multiple rows
+- [ ] **Conditional formatting** - Highlight cells based on rules
+- [ ] **Formulas** - Excel-like formulas for calculated columns
+- [ ] **Real-time collaboration** - Multiple users editing simultaneously
+
+---
+
+## Implementation Priority
+
+**High Priority** (Next phase):
+1. Column layout persistence
+2. Validation system for editors
+3. Loading states UI
+4. Tab-to-next-editable-cell navigation
+5. Context menu enhancements
+
+**Medium Priority**:
+1. Tree/hierarchical data
+2. Master-detail rows
+3. Export to CSV/Excel (enhanced)
+4. Quick filters (Excel-style)
+5. Keyboard shortcuts help overlay
+
+**Low Priority** (Nice to have):
+1. Mobile/touch support
+2. Plugin architecture
+3. Undo/redo
+4. Advanced search
+5. Real-time collaboration
+
+---
+
 ## Next Steps
 
-1. Review and approve this plan
-2. Install `@tanstack/react-table` dependency
-3. Create project directory structure
-4. Set up core types and column mapper
-5. Begin Phase 1 implementation
-6. Create Storybook stories alongside implementation
+1. ✅ All Phase 1-9 features complete
+2. ✅ Infinite scroll implemented
+3. ✅ Column pinning implemented
+4. ✅ Header grouping implemented
+5. ✅ Data grouping implemented
+6. ✅ Column reordering implemented
+7. Choose Phase 10 features to implement based on user needs
+8. Update main package README with Griddy documentation