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/bazi.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 {
   calculateBazi,
   formatBaziForPrompt,
@@ -16,7 +17,9 @@ export async function getBaziAnswer(
   const chart = calculateBazi(input);
   const chartText = formatBaziForPrompt(chart);
 
-  return streamAIResponse(
+  const stream = createStreamableValue<string>();
+  pumpAIStream(
+    stream,
     BAZI_SYSTEM_PROMPT,
     `【出生时空】
 出生地：${birthPlaceName}
@@ -27,4 +30,5 @@ ${chartText}
 【问事】
 ${question}`,
   );
+  return stream.value;
 }