diff --git a/frontend/src/components/ui-new/containers/WorkspacesLayout.tsx b/frontend/src/components/ui-new/containers/WorkspacesLayout.tsx
index c6a2686e..d77c2518 100644
--- a/frontend/src/components/ui-new/containers/WorkspacesLayout.tsx
+++ b/frontend/src/components/ui-new/containers/WorkspacesLayout.tsx
@@ -158,6 +158,7 @@ export function WorkspacesLayout() {
     setChangesMode,
     setLogsMode,
     resetForCreateMode,
+    setSidebarVisible,
   } = useLayoutStore();
 
   // Read persisted draft for sidebar placeholder (works outside of CreateModeProvider)
@@ -329,6 +330,13 @@ export function WorkspacesLayout() {
     }
   }, [isCreateMode, resetForCreateMode]);
 
+  // Show sidebar when no panel is open
+  useEffect(() => {
+    if (!isChangesMode && !isLogsMode && !isPreviewMode) {
+      setSidebarVisible(true);
+    }
+  }, [isChangesMode, isLogsMode, isPreviewMode, setSidebarVisible]);
+
   // Command bar keyboard shortcut (CMD+K)
   const handleOpenCommandBar = useCallback(() => {
     CommandBarDialog.show();