"Pending message" doesn't clear on correct timming

Describe the bug

Found an issue where my Pending message is already consumed and the agent is thinking on it (I can read the thinking) but the message still has "(pending)" appended to it, thus misleading me.

Affected version

GitHub Copilot CLI 1.0.75.

Steps to reproduce the behavior

1. Ask tasks that need thinking while on medium or high thinking
2. Add additional prompts while it is still processing (you message is now pending)
3. Check the "Pending message" is appended
4. when the agent start thinking about your message, check the "Pending message" text is still present, although the message has already been delivered.

Expected behavior

The "pending message" should clear before the agent starts thinking about the message, becaue by now it no longer is pending but was already delivered.

Additional context

No response

Reproduziere dies in GitHub Copilot CLI 1.0.75, indem du während des mittleren oder hohen Denkens eine Eingabe in die Warteschlange sendest, und beobachte sie, sobald der Agent mit der Verarbeitung dieser Eingabe beginnt. Verfolge die Anzeige der ausstehenden Nachricht beim Übergang von queued zu delivered, und betrachte das Issue als erledigt, wenn der Text „(pending)“ verschwindet, bevor der Agent beginnt, über die Nachricht nachzudenken.