fix(POSTV1-05): 修复生成请求与 Worker 重入

tests/worker/postv1-oneapi-runtime.test.ts

@@ -26,6 +26,14 @@ describe("POSTV1-02 OneAPI runtime adapter", () => {
       const headers = new Headers(init?.headers);
       expect(headers.get("authorization")).toBe("Bearer synthetic-runtime-token");
       expect(init?.redirect).toBe("error");
+      const payload = JSON.parse(String(init?.body)) as { messages: Array<{ content: unknown; role: string }> };
+      expect(payload.messages).toEqual([
+        {
+          content: "Generate exactly one image from the user's description. Return the generated image and do not answer with text only.",
+          role: "system",
+        },
+        { content: "一张用于本机验收的抽象色彩图", role: "user" },
+      ]);
       return new Response(JSON.stringify({
         choices: [{ message: { content: `![result](data:image/png;base64,${source.toString("base64")})` } }],
       }), { headers: { "content-type": "application/json" }, status: 200 });