Add comprehensive layer groups system for organizing layers hierarchically.
Features:
- Create layer groups (folders)
- Add layers to groups
- Remove layers from groups
- Toggle group collapsed/expanded state
- Get all layers in a group
- Group properties:
* groupId: Parent group ID (null if not in group)
* isGroup: Whether layer is a group
* collapsed: Whether group is collapsed
- Groups are special layers with isGroup=true
- Groups have no canvas (width/height = 0)
- Groups can contain multiple layers
- Layers track their parent group via groupId
Changes:
- Updated types/layer.ts with group properties:
* groupId: string | null
* isGroup: boolean
* collapsed: boolean
- Updated store/layer-store.ts:
* createLayer initializes group properties
* createGroup() - Create new group
* addToGroup() - Add layer to group
* removeFromGroup() - Remove from group
* toggleGroupCollapsed() - Toggle collapsed
* getGroupLayers() - Get group's layers
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
ad87b86c0f