feat: support NEXT_PUBLIC_LANGGRAPH_BASE_URL

frontend/src/core/api/api-client.ts

@@ -2,12 +2,12 @@
 
 import { Client as LangGraphClient } from "@langchain/langgraph-sdk/client";
 
-import { getBackendBaseURL } from "../config";
+import { getLangGraphBaseURL } from "../config";
 
 let _singleton: LangGraphClient | null = null;
 export function getAPIClient(): LangGraphClient {
   _singleton ??= new LangGraphClient({
-    apiUrl: getBackendBaseURL(),
+    apiUrl: getLangGraphBaseURL(),
   });
   return _singleton;
 }

frontend/src/core/config/index.ts

@@ -7,3 +7,11 @@ export function getBackendBaseURL() {
     return "http://localhost:8000";
   }
 }
+
+export function getLangGraphBaseURL() {
+  if (env.NEXT_PUBLIC_LANGGRAPH_BASE_URL) {
+    return env.NEXT_PUBLIC_LANGGRAPH_BASE_URL;
+  } else {
+    return getBackendBaseURL();
+  }
+}