- Add 8s polling fallback while view is "loading" so a missed SSE
question/summary event self-heals instead of leaving the panel stuck
on "thinking" until close+reopen.
- Track dismissed resumeSessionIds in a ref and drop loadSession from
the resume effect's deps so typing into the textarea no longer
re-fires resume and yanks the user back to the previous session.
- Guard SSE onThinking/onQuestion/onSummary against late events from a
torn-down connection by comparing the captured sessionId against
currentSessionIdRef.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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