Environment: Linux x64, Electron under headless-desktop, app.isPackaged=true, version 0.1.8, 1280x800, light appearance.
Data: fresh isolated T3 homes, identical synthetic saved SSH environment, missing remote runtime.
Download: actual curl with original desktop-generated flags; controlled loopback HTTP response.

BASE f7b81e1d1115bc7284b39161d3cd6c7f3184eb1c
Archive request started: 09:48:38.653 UTC
Connection error observed by driver: approximately 09:48:53.5 UTC
Cause: timeout
Error: Slow SSH download did not respond during connection setup.
HTTP response interrupted: 09:49:03.654 UTC (25.001 s after request)
Screenshot: the same setup-timeout diagnosis remains during automatic retry, attempt 2.

HEAD 4ef967777bec85527a9b3662445df2843c725554
Archive request started: 09:49:36.461 UTC
Video: still Connecting at 20 s and 24 s; no setup-timeout error.
HTTP response interrupted after 25 s.
Cause: remote-unavailable
Error: Could not prepare the SSH environment: Error invoking remote method 'desktop:ensure-ssh-environment': SshCommandError: curl: (18) transfer closed with 1048558 bytes remaining to read
Screenshot: underlying curl failure is preserved, attempt 1.

AI-assisted; verified with the tests and tools listed above.