Updated project to React 19

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

@@ -2,6 +2,45 @@
 
 ---
 
+## [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"
 
 ---
 

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

@@ -403,9 +403,64 @@ If migration causes issues:
 4. What's the oldest Noodl version we need to support?
 5. Should the CLI be a separate npm package or bundled?
 
+---
+
+## Dependency Analysis Impact (from TASK-000)
+
+Based on the [TASK-000 Dependency Analysis](../TASK-000-dependency-analysis/README.md), the following dependency changes have implications for legacy project migration:
+
+### Already Applied Changes (Need Testing)
+
+| Dependency | Change | Migration Impact |
+|------------|--------|------------------|
+| React 17 → 19 | Breaking | Projects using React patterns may behave differently |
+| react-instantsearch | Package renamed | Search-related custom components may need updates |
+| Algoliasearch 4 → 5 | API changes | Cloud functions using search may need migration |
+
+### Future Changes (Plan Ahead)
+
+These are NOT in TASK-001 but may require migration handling in the future:
+
+| Dependency | Potential Change | Migration Impact |
+|------------|-----------------|------------------|
+| Express 4 → 5 | Breaking API | Backend/cloud functions using Express patterns |
+| Electron 31 → 39 | Native API changes | Desktop app behavior, IPC, file system access |
+| Dugite 1 → 3 | Git API overhaul | Version control operations, commit history |
+| ESLint 8 → 9 | Config format | Developer tooling (not runtime) |
+
+### Migration Handlers to Consider
+
+Based on the dependency analysis, consider creating migration handlers for:
+
+1. **React Concurrent Mode Patterns**
+   - Projects using legacy `ReactDOM.render` patterns
+   - Timing-dependent component behaviors
+   - Strict mode double-render issues
+
+2. **Search Service Integration**
+   - Projects using Algolia search
+   - Custom search implementations
+   - API response format expectations
+
+3. **Runtime Dependencies**
+   - Projects bundled with older noodl-runtime versions
+   - Node definitions that expect old API patterns
+   - Custom JavaScript nodes using deprecated patterns
+
+### Testing Considerations
+
+When testing legacy project migration, specifically validate:
+- [ ] React 19 concurrent rendering doesn't break existing animations
+- [ ] useEffect cleanup timing changes don't cause memory leaks
+- [ ] Search functionality works after react-instantsearch migration
+- [ ] Custom nodes using old prop patterns still work
+- [ ] Preview renders correctly in updated viewer
+
 ## References
 
+- TASK-000: Dependency Analysis (comprehensive dependency audit)
 - TASK-001: Dependency Updates (lists breaking changes)
+- [TASK-000 Impact Matrix](../TASK-000-dependency-analysis/IMPACT-MATRIX.md)
 - Noodl project file documentation (if exists)
 - React 19 migration guide
 - Community feedback on pain points