completed

src/lib/prisma.ts

+import { PrismaClient } from "@prisma/client";
+
+declare global {
+  var prisma: PrismaClient | undefined;
+}
+
+export const prisma =
+  global.prisma ||
+  new PrismaClient({
+    log: ["query"],
+  });
+
+if (process.env.NODE_ENV !== "production") global.prisma = prisma;

src/types/chat.ts

+export interface Message {
+  messageId: number;  // 消息 id
+  roomId: number;     // 房间 id
+  sender: string;     // 发送人的 username
+  content: string;    // 消息内容
+  time: number;       // 消息发送时间戳
+}
+
+export interface RoomPreviewInfo {
+  roomId: number;
+  roomName: string;
+  lastMessage: Message | null;
+}

tailwind.config.ts

+import type { Config } from "tailwindcss";
+
+const config: Config = {
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};
+
+export default config;

tsconfig.json

+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}