refactor: surface BI metric definitions

src/modules/mileage/MileageModule.tsx

@@ -6,6 +6,7 @@ import DailyReportView from './DailyReportView';
 import { useHashSubTab } from '../energy/useHashSubTab';
 import RotatingFooterHint from '../../components/RotatingFooterHint';
 import { FadeIn, PageFrame, SegmentedNav } from '../../components/ui/surface';
+import MetricCatalogButton from '../../components/MetricCatalogButton';
 
 type MileageSubTab = 'monitoring' | 'statistics' | 'report';
 
@@ -27,6 +28,7 @@ export default function MileageModule() {
       icon={LayoutDashboard}
       eyebrow="MILEAGE BI"
       meta="实时监控 · 统计报表 · 每日汇报"
+      actions={<MetricCatalogButton domain="mileage" />}
       compactInfo
     >
       <div className="sticky top-0 z-30 -mx-3 bg-[var(--app-bg)] px-3 pb-2 pt-1 shadow-[0_8px_12px_-12px_rgba(15,23,42,0.08)] md:-mx-6 md:top-12 md:px-6">