argv is read manually before adw::Application sees it (GTK's option parser
rejects unknown long flags), then the filtered list is passed to
app.run_with_args. Stub exits cleanly with a stderr breadcrumb so a
developer who passes --first-run before Phase 10 lands doesn't get a
stuck process.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
