feat: 添加导航页密码保护功能

- 使用 CryptoJS AES-256 加密页面内容
- 添加密码输入界面，正确密码解锁显示
- 修复 fnos NAS 端口 5000 → 5667
- 添加加密生成脚本 generate-encrypted.js

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

generate-encrypted.js

@@ -0,0 +1,23 @@
+const CryptoJS = require('crypto-js');
+const fs = require('fs');
+
+// 读取原始 HTML
+const originalHtml = fs.readFileSync('nav-home.html', 'utf8');
+
+// 使用密码加密
+const password = 'joylodging';
+const encrypted = CryptoJS.AES.encrypt(originalHtml, password).toString();
+
+// 读取模板
+let template = fs.readFileSync('nav-home-encrypted.html', 'utf8');
+
+// 替换占位符
+template = template.replace('const ENCRYPTED_CONTENT = "ENCRYPTED_PLACEHOLDER";', 
+    `const ENCRYPTED_CONTENT = "${encrypted}";`);
+
+// 写入最终文件
+fs.writeFileSync('nav-home-encrypted.html', template);
+
+console.log('Encryption complete!');
+console.log('Encrypted content length:', encrypted.length);
+console.log('First 100 chars:', encrypted.substring(0, 100));