* Preserve editor file identity during SSH host conversion
* Keep a dirty in-session editor tab on its file record during SSH conversion
A file opened over the relay in the current session carries route provenance,
so the no-host-evidence check repointed its tab to a fresh clean record and
hid the unsaved draft. Keep any retained record with no runtime owner instead.
---------
Co-authored-by: m4air <m4air@Mac.localdomain>