备份：修复前完整项目快照 2026-04-19

backend/utils/index.js

@@ -0,0 +1,16 @@
+const { body, validationResult } = require('express-validator');
+
+const validate = (req, res, next) => {
+  const errors = validationResult(req);
+  if (!errors.isEmpty()) {
+    return res.status(400).json({ 
+      success: false, 
+      errors: errors.array() 
+    });
+  }
+  next();
+};
+
+module.exports = {
+  validate
+};