Updated project to React 19

dev-docs/tasks/phase-1/TASK-002-legacy-project-migration/CHANGELOG.md

@@ -2,6 +2,45 @@
 
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+## [2025-07-12] - Backup System Implementation
+
+### Summary
+Analyzed the v1.1.0 template-project and discovered that projects are already at version "4" (the current supported version). Created the project backup utility for safe migrations.
+
+### Key Discovery
+**Legacy projects from Noodl v1.1.0 are already at project format version "4"**, which means:
+- No version upgrade is needed for the basic project structure
+- The existing `ProjectPatches/` system handles node-level migrations
+- The `Upgraders` in `projectmodel.ts` already handle format versions 0→1→2→3→4
+
+### Files Created
+- `packages/noodl-editor/src/editor/src/utils/projectBackup.ts` - Backup utility with:
+  - `createProjectBackup()` - Creates timestamped backup before migration
+  - `listProjectBackups()` - Lists all backups for a project
+  - `restoreProjectBackup()` - Restores from a backup
+  - `getLatestBackup()` - Gets most recent backup
+  - `validateBackup()` - Validates backup JSON integrity
+  - Automatic cleanup of old backups (default: keeps 5)
+
+### Project Format Analysis
+```
+project.json structure:
+├── name: string            # Project name
+├── version: "4"            # Already at current version!
+├── components: []          # Array of component definitions
+├── settings: {}            # Project settings
+├── rootNodeId: string      # Root node reference
+├── metadata: {}            # Styles, colors, cloud services
+└── variants: []            # UI component variants
+```
+
+### Next Steps
+- Integrate backup into project loading flow
+- Add backup trigger before any project upgrades
+- Optionally create CLI tool for batch validation
+
+---
+
 ## [2025-01-XX] - Task Created
 
 ### Summary
@@ -16,7 +55,7 @@ Task documentation created for legacy project migration and backward compatibili
 ### Notes
 - This task depends on TASK-001 (Dependency Updates) being complete or in progress
 - Critical for ensuring existing Noodl users can migrate their production projects
-- Scope includes CLI tool, migration engine, and editor integration
+- Scope may be reduced since projects are already at version "4"
 
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