The retry closure belongs to the prompt, but the two paths that clear the
step-up slot as a *consequence* of something else — the server-switch reset
and `resetOAuthRecoveryState` on disconnect — left `pendingStepUpRetryRef`
installed. The next prompt to open without a retry of its own would inherit
it, so authorizing an ambient step-up on server B ran the command server A was
left mid-way through.
Clear it in the existing mirror effect whenever the slot is null, so no arm has
to remember. A ref write in an effect, since the render-phase reset must stay
pure.
Copilot on #2237.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S4WZSxx6XMKzRdgPce9CAd
Signed-off-by: cliffhall <cliff@futurescale.com>
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