Refactors the history system to track complete document state instead of
individual timeline states, making timeline operations fully undoable.
BREAKING CHANGE: History is now per-document instead of per-timeline-state.
Existing undo/redo stacks will be cleared on first load with this change.
Changes:
- historyStore: Track complete document snapshots (timeline + all states + types)
- useDocumentHistory: Simplified to work with document-level operations
- timelineStore: All timeline operations now record history
- createState, switchToState, deleteState, updateState, duplicateState
- Fixed redo button bug (was mutating Zustand state directly)
New capabilities:
- Undo/redo timeline state creation
- Undo/redo timeline state deletion
- Undo/redo switching between timeline states
- Undo/redo renaming timeline states
- Unified history for all document operations
Technical improvements:
- Proper Zustand state management (no direct mutations)
- Document snapshots include entire timeline structure
- History methods accept currentSnapshot parameter
- Removed TypeScript 'any' types for better type safety
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
