After handleSubmitResponse posted an answer, the stream connection was
never re-established, so the next question from the server was never
received. The modal would stay on the loading spinner until the user
closed and reopened it (which triggered the resume-session reconnect).
Fix: call connectToMissionInterviewStream(sessionId) before the API
call, matching the pattern used by handleRetryFromError. Also close
the stream on API error to match the error-recovery path, and add
connectToMissionInterviewStream to the useCallback dependency array.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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