feat(composer): clickable PR pill next to branch selector

[TheIcarusWings]

What

Adds a small clickable PR pill next to the branch selector in the bottom composer bar. When the active branch has a pull request, the pill shows the PR icon + #<number>, colored by state:

• open → emerald
• merged → violet
• closed → zinc

Clicking the pill opens the PR in the system browser. It sits to the left of the branch selector and does not open the branch dropdown (click is stopped/prevented).

Details

• Reuses prStatusIndicator / ChangeRequestStatusIcon / resolveThreadPr from ThreadStatusIndicators.tsx, and the readLocalApi()?.shell.openExternal pattern for opening links.
• Data comes from the existing useVcsStatus({ environmentId, cwd: branchCwd }) query already in BranchToolbarBranchSelector.tsx — no backend changes.
• The pill renders as a sibling of the ComboboxTrigger inside a flex row; the toolbar layout classes were moved onto that wrapper so the branch group stays right-aligned.
• Tooltip is action-oriented ("Open pull request #N (state) in browser") using the provider's terminology, distinct from the sidebar's state-description tooltip.
• Works with cross-repo fork PRs (head TheIcarusWings, base pingdotgg/t3code) via the existing GitManager.findLatestPr detection.

Test

Switch the bottom-bar branch to one with an open PR and confirm the pill appears with the right color and opens the correct GitHub URL.

🤖 Generated with Claude Code

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Note

Low Risk
UI-only composer toolbar change reusing existing VCS status and external-link patterns; no backend or auth changes.

Overview
Adds a clickable PR pill to the left of the composer branch selector when the active branch has an associated pull request (from the existing useVcsStatus data).

The pill shows the PR icon and #number, styled by PR state via shared ThreadStatusIndicators helpers. Clicking opens the PR URL in the system browser through readLocalApi().shell.openExternal, with click propagation stopped so the branch dropdown does not open. An action-oriented tooltip describes opening the PR in the browser.

Layout moves toolbar alignment classes onto a flex wrapper that groups the optional pill and the ComboboxTrigger.

^{Reviewed by Cursor Bugbot for commit cd4ea2c. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add clickable PR status pill to branch selector in composer toolbar

Adds a PR status pill next to the branch selector in BranchToolbarBranchSelector.tsx. When the active branch has an associated PR, a button showing the ChangeRequestStatusIcon and PR number appears with a tooltip. Clicking it opens the PR URL externally via the local API; failures surface as an error toast.

^{Macroscope summarized cd4ea2c.}

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[macroscopeapp]

Approvability

Verdict: Approved

Self-contained UI enhancement adding a clickable PR pill next to the branch selector. Reuses existing utilities and APIs with no backend, schema, or security implications.

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