refactor: surface BI metric definitions

src/modules/energy/HydrogenModule.tsx

@@ -4,6 +4,7 @@ import HydrogenView, { type HydrogenSubTab } from './HydrogenView';
 import SubTabs from './SubTabs';
 import { useHashSubTab } from './useHashSubTab';
 import { FadeIn, PageFrame } from '../../components/ui/surface';
+import MetricCatalogButton from '../../components/MetricCatalogButton';
 
 const SUB_TABS = [
   { id: 'daily',    label: '每日', icon: CalendarDays },
@@ -21,6 +22,7 @@ export default function HydrogenModule() {
       icon={CalendarDays}
       eyebrow="ENERGY BI"
       meta="数据单位清晰标注 · 支持日/总览切换"
+      actions={<MetricCatalogButton domain="hydrogen" />}
     >
       <SubTabs tabs={SUB_TABS} active={sub} onChange={setSub} />
       <AnimatePresence mode="wait">