✨ feat: impl accounts and channels

lib/db/index.ts

@@ -0,0 +1,15 @@
+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+import * as schema from "./schema";
+
+const connectionString = process.env.DATABASE_URL || "postgresql://postgres:Aa110011@localhost:5432/fluxent";
+
+// 在 Next.js 开发环境下避免热重载创建重复连接池
+const globalForDb = globalThis as unknown as {
+  conn: postgres.Sql | undefined;
+};
+
+const client = globalForDb.conn ?? postgres(connectionString, { max: 10 });
+if (process.env.NODE_ENV !== "production") globalForDb.conn = client;
+
+export const db = drizzle(client, { schema });