Reduce workspace render churn

packages/app/src/screens/workspace/workspace-screen.tsx

@@ -60,7 +60,7 @@ import {
   FloatingPanelPortalHostNameProvider,
 } from "@/components/ui/floating-panel-portal";
 import { ExplorerSidebar } from "@/components/explorer-sidebar";
-import { SplitContainer } from "@/components/split-container";
+import { MountedTabActiveContext, SplitContainer } from "@/components/split-container";
 import { SourceControlPanelIcon } from "@/components/icons/source-control-panel-icon";
 import { WorkspaceGitActions } from "@/git/workspace-actions";
 import { WorkspaceOpenInEditorButton } from "@/screens/workspace/workspace-open-in-editor-button";
@@ -855,13 +855,15 @@ const MobileMountedTabSlot = memo(function MobileMountedTabSlot({
 
   return (
     <RenderProfile id={`MobileMountedTabSlot:${tabDescriptor.kind}:${tabDescriptor.tabId}`}>
-      <View style={slotStyle} pointerEvents={isVisible ? "auto" : "none"}>
-        <WorkspacePaneContent
-          content={content}
-          isWorkspaceFocused={isWorkspaceFocused}
-          isPaneFocused={isPaneFocused}
-        />
-      </View>
+      <MountedTabActiveContext value={isVisible}>
+        <View style={slotStyle} pointerEvents={isVisible ? "auto" : "none"}>
+          <WorkspacePaneContent
+            content={content}
+            isWorkspaceFocused={isWorkspaceFocused}
+            isPaneFocused={isPaneFocused}
+          />
+        </View>
+      </MountedTabActiveContext>
     </RenderProfile>
   );
 });