refactor(actions): 更新 Prisma客户端导入方式

-将 Prisma 客户端的导入方式改为从 '@prisma/client' 导入
- 实例化一个新的 PrismaClient 对象

src/actions/ai-improve.ts

@@ -7,7 +7,8 @@ import {
 } from "@/types/ai-improve";
 import { openai } from "@/lib/ai";
 import { CoreMessage, generateText } from "ai";
-import { prisma } from "@/lib/prisma"; // Prisma客户端
+import { PrismaClient } from '@prisma/client';
+const prisma = new PrismaClient();
 
 /**
  * 调用AI优化代码