fix(build): 避免 CI prerender 阶段因 DATABASE_URL 未设置导致抛出错误

app/drizzle/db.ts

@@ -10,13 +10,12 @@ import {fileURLToPath} from 'url';
 config({ path: path.resolve(process.cwd(), '.env') });
 
 // 检查环境变量
-if (!process.env.DATABASE_URL) {
-  throw new Error('DATABASE_URL environment variable is not set');
+// 注意：在 CI/Nuxt prerender 构建阶段，可能没有 DATABASE_URL
+const connectionString = process.env.DATABASE_URL || 'postgresql://postgres:dummy@localhost:5432/dummy';
+if (!process.env.DATABASE_URL && !process.env.npm_lifecycle_script?.includes('build')) {
+  console.warn('Warning: DATABASE_URL environment variable is not set. Using dummy connection string for build/prerender.');
 }
 
-// 创建PostgreSQL连接
-const connectionString = process.env.DATABASE_URL;
-
 // 检测数据库类型
 const isNeonDatabase = connectionString.includes('neon.tech') || connectionString.includes('neon.database.com');