Back during pending subscription sign-in could accept a late response and
reopen agent setup. Abort pending reads, release abandoned sessions, and
ignore stale responses. Wait for cleanup before starting a replacement,
and preserve sessions belonging to another account or environment.
Cover deferred resume/start/prompt responses for both providers, local
login cancellation, quick reselection, and browser request abort. Stabilize
Runner fixtures and normalization assertions exposed by integration CI.
Verified: 483 focused UI tests, six onboarding browser cases, UI typecheck
and token gates, Runner fixture checks, and the complete CI run on
221f2e3eb7. Greptile scored 5/5;
all review threads are resolved. Earlier failures and recovery evidence
remain in the PR description.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
