feat: separate global llm settings from monitor page

admin/dashboard/templates/base.html

@@ -752,6 +752,7 @@
             items: [
                 { label: '用户统计', path: '/users' },
                 { label: '资源监控', path: '/system_status' },
+                { label: '全局配置', path: '/system_llm' },
                 { label: '文件浏览', path: '/file_browser' },
                 { label: '运行日志', path: '/wx_logs' },
                 { label: '错误日志', path: '/errors' }
@@ -828,6 +829,7 @@
                     '12': '/virtual_group',
                     '13': '/api_docs',
                     '14': '/system_status',
+                    '17': '/system_llm',
                     '15': '/file_browser',
                     '16': '/message_push'
                 };