Bring clients/tui/src/App.tsx from 79% to ≥90 on all four dimensions
(92.23 / 90.20 / 92.85 / 92.68) by exercising the mid-session / step-up auth
machinery that the existing suite didn't reach:
- runOAuthAuthentication result branches (success / already_authorized /
insufficient_scope / unsupported), driven deterministically via a new opt-in
runRunnerInteractiveOAuth override (defaults to the real runner so the
existing callback-driven OAuth tests are unchanged).
- The per-client auth-lifecycle listeners (authChallengeAmbient / Recovered /
Interactive / oauthError), fired through a new client-event registry on the
FakeClient, including the non-selected-server early-return guards.
- handleAuthRecoveryRequired step-up-confirm and reauth paths, handleConnect's
OAuth-on-401 branches (AuthRecoveryRequired + EmaClientNotConfigured thrown
mid-flow), handleClearOAuth's connected/disconnect path, and the AuthTab
onAuthorizeStepUp handler (EMA satisfied/interactive/failed/throw + standard
non-EMA authorize, cancel).
Part of #1610.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S3fTN8H3R8YV4yUGvZjYnX
f7ab287f6a