🔗 Move to Workspace — Custom Domain & Permission Fixes

Fixed three bugs related to moving QR codes between workspaces:

✅ Custom domain QR codes no longer break after moving — Previously, moving a QR code with a custom domain (e.g., qr.yourdomain.com) to another workspace caused the link to return a 404 error. Now your custom domain links continue working regardless of which workspace the QR code is in.
✅ Workspace owners can now move QR codes back — Fixed an issue where workspace owners couldn't move QR codes back to their original workspace, receiving a "403 Forbidden" error.
✅ Move dialog displays correctly — Fixed a display issue where the move dialog showed " instead of quotation marks around the QR code name.