- Updated addMessageToChat in UI helpers and InteractiveModeContext to return rendered components instead of void.
- EventController now tracks IRC message components and removes them after a 10-second TTL, avoiding duplicate expiry scheduling per message signature.
- EventController dispose now clears all pending IRC expiry timers and tests were added for immediate render, TTL removal, duplicate suppression, and timer cleanup.
- Tracked locally submitted user signatures for both optimistic and streamed-queue submissions in interactive-mode context state.
- Updated user message_start handling to avoid re-clearing the editor and re-adding chat for locally originated messages.
- Cleared consumed local signatures on queued-message restore and added tests for queued, external, and optimistic message_start editor behavior.
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