- Separate archive.md file for archived items (append-only)
- Archive manager in Admin page with filters and search
- Global search shows archive results with count in header
- Restore items to original location via restore-path metadata
- Read-only view dialog for archived items (double-click to open)
- Python API endpoints: GET/POST /api/archive, POST /api/archive/restore
- Support in all storage backends (API, Direct, Browser)
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