Fix AI stream by returning stream.value directly from Server Actions.

createStreamableValue must be created and returned in the action itself; wrapping in { data } or a helper return caused production RSC serialization errors.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/actions/liuyao.ts

@@ -1,6 +1,7 @@
 "use server";
 
-import { streamAIResponse } from "@/lib/ai/stream";
+import { createStreamableValue } from "ai/rsc";
+import { pumpAIStream } from "@/lib/ai/stream";
 import {
   formatLiuyaoTimingForPrompt,
   getTimingInfoWithLongitude,
@@ -51,7 +52,9 @@ export async function getLiuyaoAnswer(input: LiuyaoInput) {
     guaDetailText = "";
   }
 
-  return streamAIResponse(
+  const stream = createStreamableValue<string>();
+  pumpAIStream(
+    stream,
     LIUYAO_SYSTEM_PROMPT,
     `${timingText}
 
@@ -63,4 +66,5 @@ ${input.question}
 
 ${guaDetailText}`,
   );
+  return stream.value;
 }