fix:批量修复了一些问题

frontend/src/admin/AdminLayout.tsx

@@ -12,16 +12,18 @@ import { fetchHealth } from './dal'
 import Login from './Login'
 
 const NAV_ITEMS = [
+  // ── 观测(只读) ──
   { to: '/admin', label: '仪表盘', icon: '◇', end: true },
-  { to: '/admin/collection', label: '数据采集', icon: '◈' },
+  { to: '/admin/eval', label: '评估', icon: '◈' },
+  { to: '/admin/monitoring', label: '监控', icon: '◐' },
+  { to: '/admin/logs', label: '日志', icon: '▤' },
+  // ── 操作(写入,需登录) ──
   { to: '/admin/predictions', label: '预测管理', icon: '◆' },
-  { to: '/admin/backtest', label: '回测管理', icon: '◉' },
-  { to: '/admin/monitoring', label: '监控面板', icon: '◐' },
+  { to: '/admin/collection', label: '数据采集', icon: '◈' },
+  { to: '/admin/backtest', label: '回测', icon: '◉' },
   { to: '/admin/data-sources', label: '数据源', icon: '◫' },
   { to: '/admin/llm-config', label: 'LLM 配置', icon: '◬' },
   { to: '/admin/config', label: '系统配置', icon: '◑' },
-  { to: '/admin/logs', label: '系统日志', icon: '▤' },
-    { to: '/admin/eval', label: '评估管理', icon: '◈' },
 ]
 
 /** 报眉日期行,与前台同款式 */
@@ -220,6 +222,7 @@ export default function AdminLayout() {
             <button
               onClick={handleLogout}
               className="text-ink-500 transition-colors hover:text-press"
+              title="退出登录"
             >
               登出
             </button>