feat(chat): add queued message sending

[aaroncarry]

Description

Adds queued message sending for active Chatbox conversations.

• Allows users to send multiple messages while a response is generating; messages are processed sequentially per session.
• Adds queue visibility and controls for pending messages, including edit and delete.
• Continues queued messages after normal completion or manual stop.
• Pauses the remaining queue after generation errors or tool-approval pauses; users can explicitly resume when appropriate.
• Prevents queued messages from being sent after thread replacement, rollback, or deletion.
• Adds confirmations before actions that discard queued messages.
• Refines the paused-queue UI with a compact actionable status card, queue count, and no raw provider error body.
• Prevents the first normal message from briefly flashing as a queue item.
• Adds localization and regression coverage for queue behavior and UI states.

Additional Notes

• Queue state is in-memory only and is cleared when the app restarts.
• Raw provider error details remain in the assistant error message; the queue status card only shows an actionable summary.
• Verified with focused queue/component tests, formatting checks, i18n validation, and git diff --check.

Screenshots

Contributor Agreement

• I have read and agree with the above statement.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on this repository. Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 930df3fc-03ed-4d93-80f0-f2de8e7d4738

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}