test(desktop): primary backend crash-loop before readiness shows no error

Reproduces #10517: the primary backend exits with code=1 on every start,
keeps restarting, and the user never gets a backend-independent dialog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
62b39618fdJulius Marminge committed on 10/22/2026, 8:44:07 PMparent52c2b38
1 file changedLine totals unavailable