Port the only substantive fix#211 was missing relative to #203 (which is
being closed): the "Send now" handler branched on the closure-captured
isStreaming, but a turn can finish between render and click. In that window
stop() is a no-op, so arming flushOnAbortRef/interruptNextSendRef would strand
those one-shot flags and leak into a later, unrelated Stop (auto-sending a
queued message the user never asked to send).
- Mirror the live useChat status in statusRef (updated each render) and branch
sendNow on it instead of isStreaming, so the not-streaming path runs when the
turn has already ended and the interrupt flags are never armed against a
no-op stop().
- Belt-and-suspenders: clear flushOnAbortRef/interruptNextSendRef when a new
turn starts streaming, defusing the sub-render-tick window where a flag could
still be armed but the expected abort never fired. No-op for the legit
interrupt path (both refs are consumed synchronously beforehand).
Keeps #211's existing structure and its flushNext-returns-boolean fix. The
rest of #203's divergence is comment rewording, a server-side rename of the
same pure interrupt-gate, and fewer tests — nothing else to port.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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