fix(desktop): show a selected tab that arrives after the tab list

The effect that shows an explicitly selected tab was keyed on the
selection alone, so a selection made before the desktop app published
its tab list was dropped rather than applied when the tab arrived. It is
now keyed on that tab being live as well, which covers the late arrival
without a retry ref to arm and disarm.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0139YonWmiZUnPMTHoH4PtAJ

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/home/hooks/use-browser-tab-resources.test.tsx

@@ -165,6 +165,22 @@ describe('useBrowserTabResources', () => {
     expect(selectResource).not.toHaveBeenCalled()
   })
 
+  it('shows a page selected before the pages landed, once it arrives', () => {
+    render({ selectedResourceId: '2', activeResourceId: '2' })
+    expect(sendBrowserPanelAction).not.toHaveBeenCalled()
+
+    pushTabs(SCOPE, [tab('1', true), tab('2')], '1')
+    expect(sendBrowserPanelAction).toHaveBeenCalledExactlyOnceWith(
+      'switch-tab',
+      { tabId: '2', claim: false },
+      SCOPE
+    )
+
+    // The requested switch landing is not a native change to follow.
+    pushTabs(SCOPE, [tab('1'), tab('2', true)], '2')
+    expect(selectResource).not.toHaveBeenCalled()
+  })
+
   it('adopts the native active page on reopen instead of pushing the fallback tab', () => {
     const resources: MothershipResource[] = [
       { type: 'browser', id: '1', title: 'Page 1' },

apps/sim/app/workspace/[workspaceId]/home/hooks/use-desktop-tab-resources.ts

@@ -187,16 +187,22 @@ export function useDesktopTabResources({
     }
   }, [addResource, hasSession, removeResource, resources, scopeId, tabs, type])
 
+  /** Whether the selected resource is one of this kind's live tabs. */
+  const selectedTabIsLive =
+    selectedResourceId !== null && tabs.some((tab) => tab.id === selectedResourceId)
+
   // Selecting a resource tab shows its native tab. Keyed on the explicit
-  // selection alone: a native push must not re-assert a selection it just
-  // moved away from, or the two sides would trade switches forever, and the
-  // strip's fallback is not a choice to impose on the desktop app.
+  // selection alone — the strip's fallback is not a choice to impose on the
+  // desktop app, and a native push must not re-assert a selection it just
+  // moved away from, or the two sides would trade switches forever — and on
+  // that tab being live, so a selection made before the desktop app published
+  // its tab list is shown once the tab arrives rather than dropped.
   useEffect(() => {
-    if (!selectedResourceId || selectedResourceId === activeTabIdRef.current) return
-    if (!tabsRef.current.some((tab) => tab.id === selectedResourceId)) return
+    if (!selectedResourceId || !selectedTabIsLive) return
+    if (selectedResourceId === activeTabIdRef.current) return
     requestedTabIdRef.current = selectedResourceId
     switchTabRef.current(selectedResourceId, scopeIdRef.current)
-  }, [selectedResourceId])
+  }, [selectedResourceId, selectedTabIsLive])
 
   // With no effective selection the strip falls back to a tab of its own
   // choosing. The desktop app still shows the tab the user was last on, so the