Sum Abiut b676519c58 test: add headless launch + --doctor smoke tests for AppImage artifact (#592) ...

The AppImage artifact test only validated package structure (extraction,
AppDir layout, asar contents) — runtime regressions like frame-fix-wrapper
syntax errors, bad asar patches, or Electron startup crashes silently
passed CI. The .deb path already ran `--doctor` as a smoke check; the
AppImage path now has parity plus a 10s headless launch under Xvfb.

`setsid` + `kill -- -PGID` is load-bearing: xvfb-run's EXIT trap leaks
Xvfb on signal kill, so running the whole stack in its own process group
lets the teardown reap xvfb-run, Xvfb, dbus, AppRun, electron, and zygote
children together. `procps` (for pkill), `dbus-x11`, and `xvfb` added to
the CI apt line.

The headless probe catches main-process startup failures only — GPU /
renderer-process crashes like #583 leave the main process alive and pass
this check; that scope disclaimer is inlined at test-artifact-appimage.sh
lines 114-117 so future contributors don't try to claim #583 coverage by
switching Xvfb off.

Co-authored-by: Sum Abiut <sabiut@users.noreply.github.com>

2026-05-16 10:15:39 -04:00

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