- Update spellbook icon to BookHeart across the app
- Implement Preview mode with routing /:actor/:identifier
- Add Preview banner in Home component with Apply/Discard actions
- Add Preview and Share buttons to Spellbook renderers
- Clean up unused imports
Phase 3 implementation:
- Created layout-presets.ts with 3 built-in presets (side-by-side, main-sidebar, grid)
- Implemented fillLayoutTemplate() for recursive template filling with window IDs
- Added collectWindowIds() for depth-first traversal of layout trees
- Created applyPresetToLayout() to reorganize existing windows
- Created layout-parser.ts for /layout command argument parsing
- Added layout command to man.ts with documentation and examples
- Built LayoutViewer component with:
* Visual preset gallery with diagrams
* Window count validation
* Apply preset functionality
* Error handling for insufficient windows
* Command-line preset specification support
- Wired LayoutViewer into WindowRenderer with lazy loading
- Added "layout" to AppId type definition
- Exposed applyPresetLayout in useGrimoire hook
Presets allow users to quickly reorganize multiple windows into
common layouts: 50/50 splits, 70/30 main+sidebar, or 2×2 grids.
Generated with [Claude Code](https://claude.com/claude-code)
