fix(web): close Run-on picker after selecting a machine

[macodev00]

What

• Close the compact Run on environment picker when a machine (or workspace mode) is selected.

Why

Fixes #12684

Base UI MenuRadioItem defaults closeOnClick to false, so the selection applied but the popover stayed open. Same fix pattern as the traits picker.

UI

N/A for motion video — one-line interaction: pick closes menu. No screenshots of unrelated chrome.

Checklist

• I read CONTRIBUTING.md and kept this small / bug-only
• What + why explained above
• Followed AGENTS.md documentation rules (no new docs)
• No unrelated changes
• CLA / AI-reviewed standing override for macodev00 auto-contrib

Summary by CodeRabbit

• Bug Fixes
  • Mobile run and workspace selection menus now close immediately after choosing an option.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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

Review profile: CHILL

Plan: Advanced

Run ID: 5b8e1dd1-5a4e-4b19-826c-49ea38b85135

📥 Commits

Reviewing files that changed from the base of the PR and between 7445aa7 and d0eaee8.

📒 Files selected for processing (1)

• apps/web/src/components/BranchToolbar.tsx

Included review availability: Your plan provides up to 10 included reviews per hour; 5 remain after this review.

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📝 Walkthrough

Walkthrough

The mobile run context selector now closes when users select a run environment or workspace option.

Changes

Mobile run context selection

Layer / File(s)	Summary
Close menu after selection apps/web/src/components/BranchToolbar.tsx	The “Run on” and “Workspace” radio items now pass closeOnClick.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Bug fix · Severity of issue fixed: Low

Suggested reviewers: t3dotgg

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary fix: closing the Run on picker after selecting a machine.
Description check	✅ Passed	The description explains what changed, why it changed, the linked issue, and the focused scope. The UI section does not include screenshots or a video, although the template requests them for interact…
Linked Issues check	✅ Passed	The change addresses #12684 in apps/web/src/components/BranchToolbar.tsx. It adds closeOnClick to the MobileRunContextSelector radio items for both the Run on machine choices and the Workspace c…
Out of Scope Changes check	✅ Passed	The summary shows only five additions and three removals in apps/web/src/components/BranchToolbar.tsx. All changes add close-on-click behavior to the Run on and Workspace picker options. No unrelate…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…

✨ Finishing Touches

🧪 Generate unit tests (beta)

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[juliusmarminge]

Superseded by #12685, which already merged and fixed #12684. Closing this as leftover hygiene.