fix: disable api cache for real-time data

frontend/next.config.ts

@@ -9,6 +9,16 @@ const nextConfig: NextConfig = {
       },
     ];
   },
+  async headers() {
+    return [
+      {
+        source: "/api/:path*",
+        headers: [
+          { key: "Cache-Control", value: "no-store, max-age=0" },
+        ],
+      },
+    ];
+  },
 };
 
 export default nextConfig;