feat: optimize settings management and admin functionality

- Add system log cleanup functionality with batch processing
- Optimize v2_settings table performance by unifying value storage
- Add comprehensive client support list for one-click subscription
- Fix QR code subscription links for specific node types
- Fix route addition issues in admin management panel
- Enhance admin system controller with log management APIs

public/assets/admin/locales/zh-CN.js

@@ -1077,7 +1077,7 @@ window.XBOARD_TRANSLATIONS['zh-CN'] = {
       "uri": "URI",
       "requestData": "请求数据",
       "exception": "异常信息",
-      "totalLogs": "总日志数：{{count}}",
+      "totalLogs": "总日志数",
       "tabs": {
         "all": "全部",
         "info": "信息",