fix(main): prevent refetching on window focus to optimize performance

web/default/src/main.tsx

@@ -63,7 +63,8 @@ const queryClient = new QueryClient({
           [401, 403].includes(error.response?.status ?? 0)
         )
       },
-      refetchOnWindowFocus: import.meta.env.PROD,
+      // Keep focused tabs from silently re-running heavy pages like logs.
+      refetchOnWindowFocus: false,
       staleTime: 10 * 1000, // 10s
     },
     mutations: {