fix(web): show previous worktree branch on second line

[Yash-Singh1]

The compact workspace menu truncates the branch in "Previous worktree" so heavily that the destination is hard to identify.

Show the action and branch on separate lines, use smaller muted text for the branch, and widen the menu to 21rem when that option is present. The compact menu and wider composer picker use the same row.

Before

After

Verified in the T3 Code dev client with a long branch name. Selecting the row updated the draft's branch and worktree path. Web typecheck, focused lint, and formatting checks passed.

Model: GPT-6 Astra. Harness: Codex.

Summary by CodeRabbit

• New Features
  • The “Previous worktree” option now shows its branch name when available, making it easier to identify the worktree.
  • The menu is positioned above its trigger and adjusts its width to fit the available screen space.

[macroscopeapp]

Macroscope has since reviewed this pull request. An earlier review was skipped by a cost limit; a review has now completed, so that notice no longer applies.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — The PR is a localized web UI presentation fix that preserves existing worktree-selection behavior. Human review is still warranted because an unresolved review finding identifies a concrete potential operation-identifier issue in a separate server provider.

No code changes detected at 2e4b4f6. Prior analysis still applies.

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[macroscopeapp]

UI consistency review completed with three inline findings in apps/web/src/index.css.

^{Posted via Macroscope — UI Consistency}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.5 KiB	13.5 KiB	0 B (0.0%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.1 KiB	7.1 KiB	−5 B (−0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.5 KiB	6.5 KiB	+5 B (+0.1%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	56.3 KiB	56.3 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.5 KiB	13.5 KiB	−39 B (−0.3%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.1 KiB	7.1 KiB	−8 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.5 KiB	6.4 KiB	−31 B (−0.5%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	57.1 KiB	57.0 KiB	−44 B (−0.1%)	66.4 KiB	✅
Claude	Live turn messages	10	9	−1 (−10.0%)	21	✅

Baseline: 68fb7f4 · PR result: 2e4b4f6 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 113.9 KiB
• Claude decoded thread snapshot: 114.7 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

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Important

Review skipped

Review was skipped as selected files did not have any reviewable changes.

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Reviewing files that changed from the base of the PR and between ab79364 and 2e4b4f6.

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Run ID: fae4b045-7321-4304-9126-3b72d21adf45

📥 Commits

Reviewing files that changed from the base of the PR and between f5ef0dd and ab79364.

📒 Files selected for processing (3)

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

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📝 Walkthrough

Walkthrough

Both run-context selectors now show previous-worktree content through a shared component. The component displays the branch name when provided. The selectors constrain popup width when the previous-worktree option is present.

Changes

Previous Worktree Menu

Layer / File(s)	Summary
Shared previous-worktree content apps/web/src/components/PreviousWorktreeItemContent.tsx	The new component renders the history icon and label. When a branch name is provided, it displays the name using MiddleTruncate.
Selector integration and popup sizing apps/web/src/components/BranchToolbar.tsx, apps/web/src/components/BranchToolbarEnvModeSelector.tsx	Both selectors pass the previous-worktree branch to the shared component and constrain popup width when the option is present. The mobile popup also sets its alignment and side.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: juliusmarminge

Merge Risk: ⚪ Minimal · up to ab793

The previous-worktree option displays the branch on a second line, and the popup sizing concern was ruled out. No identified issue blocks merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the main UI change: showing the previous worktree branch on a second line.
Description check	✅ Passed	The description explains the change and its reason, includes before-and-after UI screenshots, and records verification results. It does not use the template headings or include the checklist, but the …

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