- Add POST/PATCH/DELETE endpoints for directory operations (create, rename, delete)
- Add POST/PATCH endpoints for file operations (create, rename)
- Implement writable vault check to prevent modifications on read-only vaults
- Update file delete endpoint to broadcast SSE events and update index
- Add Pydantic models for all new request/response schemas
- Integrate context menu support in frontend for files and directories
- Broadcast real