refactor: enhance message streaming and UI components; add SWR provider

services/frontend/src/components/providers.tsx

@@ -0,0 +1,13 @@
+"use client";
+
+import { SWRConfig } from "swr";
+import { swrConfig } from "@/lib/swr-config";
+
+/**
+ * Client-side SWR provider. Lives in its own client component so the config's
+ * callbacks (shouldRetryOnError / onErrorRetry) never cross the server→client
+ * boundary from the server-rendered root layout.
+ */
+export function SwrProvider({ children }: { children: React.ReactNode }) {
+  return <SWRConfig value={swrConfig}>{children}</SWRConfig>;
+}