feat: focus ETC metric drilldowns

src/modules/energy/ETCDetails.tsx

@@ -89,7 +89,11 @@ export default function ETCDetails({
   };
 
   return (
-    <section className="overflow-hidden rounded-lg border border-slate-100 bg-white shadow-sm">
+    <section
+      id="etc-details"
+      tabIndex={-1}
+      className="scroll-mt-3 overflow-hidden rounded-lg border border-slate-100 bg-white shadow-sm outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2"
+    >
       <header className="flex flex-col gap-3 border-b border-slate-100 px-3 py-3 md:px-4">
         <div className="flex items-center justify-between gap-3">
           <div>

src/modules/energy/ETCView.tsx

@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useState } from 'react';
+import type { ReactNode } from 'react';
 import { CircleCheck, CircleX, Clock3, Database, ReceiptText, RefreshCw, Route, Truck } from 'lucide-react';
 import { fetchEtcOverview } from './api';
 import type { EtcOverviewResponse } from './types';
@@ -23,6 +24,31 @@ function syncStatusLabel(status: EtcOverviewResponse['integration']['lastSyncSta
   return '状态未知';
 }
 
+function DrilldownMetricButton({
+  label,
+  title,
+  onClick,
+  children,
+}: {
+  label: string;
+  title: string;
+  onClick: () => void;
+  children: ReactNode;
+}) {
+  return (
+    <button
+      type="button"
+      onClick={onClick}
+      aria-controls="etc-details"
+      aria-label={label}
+      className="min-w-0 rounded-2xl text-left outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2"
+      title={title}
+    >
+      {children}
+    </button>
+  );
+}
+
 export default function ETCView() {
   const [data, setData] = useState<EtcOverviewResponse | null>(null);
   const [error, setError] = useState<string | null>(null);
@@ -47,6 +73,18 @@ export default function ETCView() {
     );
   }, [commitDetailContext, detailContext]);
 
+  const openDetailView = useCallback((next: EtcDetailView) => {
+    selectDetailView(next);
+    window.requestAnimationFrame(() => {
+      const details = document.getElementById('etc-details');
+      details?.focus({ preventScroll: true });
+      details?.scrollIntoView({
+        behavior: window.matchMedia('(prefers-reduced-motion: reduce)').matches ? 'auto' : 'smooth',
+        block: 'start',
+      });
+    });
+  }, [selectDetailView]);
+
   useEffect(() => {
     const handlePopState = () => setDetailContext(parseEtcDrillContext(window.location.search));
     window.addEventListener('popstate', handlePopState);
@@ -104,10 +142,18 @@ export default function ETCView() {
       </SurfaceCard>
 
       <div className="grid grid-cols-2 gap-3 md:grid-cols-4">
-        <button type="button" onClick={() => selectDetailView('records')} className="text-left" title="查看通行记录"><MetricTile icon={ReceiptText} label="ETC 总费用" value={fmtMoney(kpi.totalAmount)} helper={`通行费 ${fmtMoney(kpi.tollAmount)} · 服务费 ${fmtMoney(kpi.serviceFee)}`} /></button>
+        <DrilldownMetricButton label={`查看 ETC 通行记录，总费用 ${fmtMoney(kpi.totalAmount)}`} title="查看通行记录" onClick={() => openDetailView('records')}>
-        <button type="button" onClick={() => selectDetailView('records')} className="text-left" title="查看通行记录"><MetricTile icon={Route} label="通行次数" value={kpi.passageCount} unit="次" helper={kpi.latestTransactionTime ? `最新 ${kpi.latestTransactionTime}` : '暂无通行记录'} tone="emerald" /></button>
+          <MetricTile icon={ReceiptText} label="ETC 总费用" value={fmtMoney(kpi.totalAmount)} helper={`通行费 ${fmtMoney(kpi.tollAmount)} · 服务费 ${fmtMoney(kpi.serviceFee)}`} />
-        <button type="button" onClick={() => selectDetailView('records')} className="text-left" title="查看通行记录"><MetricTile icon={Truck} label="通行车辆" value={kpi.vehicleCount} unit="辆" helper="按车牌去重" tone="amber" /></button>
+        </DrilldownMetricButton>
-        <button type="button" onClick={() => selectDetailView('bills')} className="text-left" title="查看结算账单"><MetricTile icon={Database} label="账单应收" value={fmtMoney(kpi.receivableAmount)} helper={`${kpi.billCount} 账单 · 已收 ${fmtMoney(kpi.paidAmount)} · ${collectionRate.toFixed(1)}%`} tone="slate" /></button>
+        <DrilldownMetricButton label={`查看 ETC 通行记录，共 ${kpi.passageCount} 次`} title="查看通行记录" onClick={() => openDetailView('records')}>
+          <MetricTile icon={Route} label="通行次数" value={kpi.passageCount} unit="次" helper={kpi.latestTransactionTime ? `最新 ${kpi.latestTransactionTime}` : '暂无通行记录'} tone="emerald" />
+        </DrilldownMetricButton>
+        <DrilldownMetricButton label={`查看 ETC 通行记录，共 ${kpi.vehicleCount} 辆车`} title="查看通行记录" onClick={() => openDetailView('records')}>
+          <MetricTile icon={Truck} label="通行车辆" value={kpi.vehicleCount} unit="辆" helper="按车牌去重" tone="amber" />
+        </DrilldownMetricButton>
+        <DrilldownMetricButton label={`查看 ETC 结算账单，应收 ${fmtMoney(kpi.receivableAmount)}`} title="查看结算账单" onClick={() => openDetailView('bills')}>
+          <MetricTile icon={Database} label="账单应收" value={fmtMoney(kpi.receivableAmount)} helper={`${kpi.billCount} 账单 · 已收 ${fmtMoney(kpi.paidAmount)} · ${collectionRate.toFixed(1)}%`} tone="slate" />
+        </DrilldownMetricButton>
       </div>
 
       <div className="grid gap-3 md:grid-cols-3">