fix: add missing fs and path imports to scripts

scripts/form-validation.js

@@ -1,5 +1,6 @@
 const { FormTester } = require('./utils/form-tester');
 const fs = require('fs');
+const path = require('path');
 
 async function main() {
   console.log('📝 开始表单验证...\n');

scripts/performance-audit.js

@@ -1,4 +1,6 @@
 const { runLighthouse, generateReport, extractMetrics } = require('./utils/lighthouse-runner');
+const fs = require('fs');
+const path = require('path');
 
 const PAGES = [
   { name: '首页', url: 'http://localhost:3000' },

scripts/seo-check.js

@@ -1,5 +1,6 @@
 const { SEOValidator } = require('./utils/seo-validator');
 const fs = require('fs');
+const path = require('path');
 
 const PAGES = [
   { name: '首页', url: 'http://localhost:3000' },