feat(web): add shortcut to unsettle the last thread

[maria-rcks]

Adds a default mod+shift+u shortcut that finds the most recently settled thread and un-settles it. The action uses the persisted settlement timestamp, works across environments, and reports command failures through the existing toast.

Verification: vp test run apps/web/src/keybindings.test.ts; vp run --filter @t3tools/web typecheck; targeted lint (all passed, with existing warnings only).

Note

Written by gpt-6 on behalf of Maria

---

^{Need help on this PR? Tag @codesmith-bot with what you need. Autofix is disabled.}

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: Repository: TrogonStack/t3code/.coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 1ea8e54d-1293-4219-bb66-2a441e891634

---

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.}

[cursor]

PR Summary

Low Risk
User-triggered shortcut reuses the existing unsettle mutation; scope is limited to picking one settled thread by timestamp with no auth or data-model changes.

Overview
Adds mod+shift+u (thread.unsettleLast) to undo settlement on the most recently settled thread, using settledAt and filtering out archived threads and environments that do not support settlement.

The handler is wired in ChatView (in-thread shortcuts) and ChatRouteGlobalShortcuts in _chat.tsx so it works on chat routes even when the thread view is not focused. Both paths call the existing unsettle command with reason: "user" and show the same error toast on failure.

Contracts and shared default keybindings register the new command; keybindings.test.ts asserts mod+shift+u resolves outside the terminal.

^{Reviewed by Cursor Bugbot for commit 8bbce71. Bugbot is set up for automated code reviews on this repo. Configure here.}