Fix isFeishu undefined error and ignore .trae/

- Define isFeishu = isFeishuWiki || isFeishuDocx (was referenced but
  never declared, causing ReferenceError on Feishu URLs)
- Add mkdirSync import, drop unused basename
- Add .trae/ to .gitignore (IDE-local skill drafts, not for publish)

.gitignore

@@ -16,6 +16,7 @@ feishu-auth-qr.png
 # Local config / IDE
 .claude/
 .debug/
+.trae/
 .DS_Store
 
 # Bundled browsers (pkg build output)

auto-scrape.mjs

@@ -13,8 +13,8 @@
  */
 import { chromium } from 'playwright';
 import CryptoJS from 'crypto-js';
-import { writeFileSync, readFileSync, existsSync } from 'fs';
-import { resolve, basename, dirname } from 'path';
+import { writeFileSync, readFileSync, existsSync, mkdirSync } from 'fs';
+import { resolve, dirname } from 'path';
 import { execSync } from 'child_process';
 import { fileURLToPath } from 'url';
 
@@ -55,6 +55,7 @@ const COOKIE_FILE  = resolve('cookies.json');
 const isFeishuWiki = /feishu\.cn\/wiki\//.test(TARGET_URL);
 const isFeishuDocx = /feishu\.cn\/docx\//.test(TARGET_URL);
 const isYitang = TARGET_URL.includes('yitang.top/fs-doc/');
+const isFeishu = isFeishuWiki || isFeishuDocx;
 
 if (!isFeishuWiki && !isFeishuDocx && !isYitang) {
   console.error('❌ URL 格式不正确，支持 yitang.top/fs-doc/<acl>/<docId> 或 *.feishu.cn/wiki/<token>');