fix: hide empty worktree metadata row (#4457)

src/renderer/src/components/sidebar/WorktreeCard.quick-actions.test.tsx

@@ -189,6 +189,23 @@ describe('WorktreeCard quick actions', () => {
     expect(markup).toContain('tabindex="0"')
   })
 
+  it('does not reserve an empty metadata row for detached git worktrees', () => {
+    worktreeCardProperties = []
+
+    const markup = renderToStaticMarkup(
+      <WorktreeCard
+        worktree={makeWorktree({ displayName: 'orca', branch: '' })}
+        repo={makeRepo()}
+        isActive={false}
+        hideRepoBadge
+      />
+    )
+
+    expect(markup).toContain('orca')
+    expect(markup).not.toContain('data-worktree-card-meta-row=""')
+    expect(markup).toContain('tabindex="0"')
+  })
+
   it('omits the repeated branch metadata row when compact cards are enabled', () => {
     worktreeCardProperties = []
     settings = { experimentalCompactWorktreeCards: true }

src/renderer/src/components/sidebar/WorktreeCard.tsx

@@ -584,7 +584,8 @@ const WorktreeCard = React.memo(function WorktreeCard({
   const cacheTtlMs = useAppStore((s) => s.settings?.promptCacheTtlMs ?? 0)
   const showInlineRepoBadge = compactCards && !!repo && !hideRepoBadge && !isFolder
   const showRepoBadgeInMetaRow = !compactCards && !!repo && !hideRepoBadge
-  const showBranch = !isFolder && (!compactCards || branch !== worktree.displayName)
+  const showBranch =
+    !isFolder && branch.length > 0 && (!compactCards || branch !== worktree.displayName)
   // Why: rebases already surface in source control; keep dense cards from
   // carrying a persistent rebase chip while preserving other interruption cues.
   const showConflictOperationBadge =
@@ -598,9 +599,20 @@ const WorktreeCard = React.memo(function WorktreeCard({
   const showTitleRowUnread = compactCards && showUnreadQuickAction && !showStatus
   const showTitleRowPrimary = compactCards && worktree.isMainWorktree && !isFolder
   const showMetaRowDetails = !compactCards && (hasDetails || hasPorts)
-  // Why: detailed layout is the user's explicit choice to reserve a scannable
-  // metadata lane; compact layout only opens that lane for transient state.
-  const hasMetaRow = !compactCards || hasMetadataBadge || cacheStartedAt != null
+  // Why: detailed cards need a stable metadata lane only when it has content.
+  // Detached git worktrees can have no branch text, and grouped project
+  // views hide the repo badge; don't reserve a blank metadata lane in that case.
+  const hasDetailedMetaRowContent = Boolean(
+    (showRepoBadgeInMetaRow && repo) ||
+    isFolder ||
+    showBranch ||
+    showConflictOperationBadge ||
+    cacheStartedAt != null ||
+    showMetaRowDetails
+  )
+  const hasMetaRow = compactCards
+    ? hasMetadataBadge || cacheStartedAt != null
+    : hasDetailedMetaRowContent
   const showHeaderActions = showTitleRowUnread || showTitleRowPrimary || showDeleteQuickAction
   const showBranchIdentityHover = compactCards && showBranch
   // Why: sidebar rows need a small surface inset, while their content remains