feat(mileage): add report loading overlay

src/modules/mileage/DailyReportView.tsx

@@ -41,7 +41,6 @@ import {
 import Blur from '../../components/Blur';
 import {
   ErrorState,
-  LoadingState,
   MetricTile,
   SurfaceCard,
 } from '../../components/ui/surface';
@@ -57,6 +56,7 @@ type VehicleSortKey = 'dailyMileage' | 'sevenDayMileage' | 'completionRate';
 type SortDirection = 'asc' | 'desc';
 
 const VEHICLE_PAGE_SIZE = 20;
+const MIN_REPORT_LOADING_MS = 280;
 
 const VEHICLE_FILTERS: { id: VehicleFilter; label: string }[] = [
   { id: 'ALL', label: '全部' },
@@ -209,6 +209,48 @@ function ReportDatePicker({
   );
 }
 
+function DailyReportLoadingOverlay({ reportDate }: { reportDate: string }) {
+  return (
+    <motion.div
+      initial={{ opacity: 0 }}
+      animate={{ opacity: 1 }}
+      exit={{ opacity: 0 }}
+      transition={{ duration: 0.16, ease: 'easeOut' }}
+      role="status"
+      aria-live="polite"
+      className="fixed inset-0 z-[100] flex items-center justify-center bg-slate-950/20 p-5 backdrop-blur-[2px]"
+    >
+      <motion.div
+        initial={{ opacity: 0, y: 12, scale: 0.96 }}
+        animate={{ opacity: 1, y: 0, scale: 1 }}
+        exit={{ opacity: 0, y: 8, scale: 0.98 }}
+        transition={{ duration: 0.22, ease: 'easeOut' }}
+        className="w-full max-w-[260px] overflow-hidden rounded-xl border border-slate-100 bg-white p-5 text-center shadow-2xl"
+      >
+        <div className="relative mx-auto flex h-12 w-12 items-center justify-center">
+          <motion.span
+            className="absolute inset-0 rounded-full border-2 border-blue-100"
+            animate={{ scale: [0.86, 1.15], opacity: [0.9, 0] }}
+            transition={{ duration: 1.2, repeat: Infinity, ease: 'easeOut' }}
+          />
+          <span className="relative flex h-10 w-10 items-center justify-center rounded-full bg-blue-50 text-blue-600">
+            <RefreshCw size={19} className="animate-spin" />
+          </span>
+        </div>
+        <div className="mt-3 text-sm font-black text-slate-900">正在加载日报</div>
+        <div className="mt-1 text-[11px] font-bold text-slate-400">正在汇总 {fmtDate(reportDate)} 的里程数据</div>
+        <div className="mt-4 h-1 overflow-hidden rounded-full bg-slate-100">
+          <motion.div
+            className="h-full w-1/2 rounded-full bg-blue-500"
+            animate={{ x: ['-100%', '220%'] }}
+            transition={{ duration: 1.15, repeat: Infinity, ease: 'easeInOut' }}
+          />
+        </div>
+      </motion.div>
+    </motion.div>
+  );
+}
+
 function updateReportDateInUrl(date: string): void {
   const url = new URL(window.location.href);
   url.searchParams.set('mileageReportDate', date);
@@ -831,7 +873,7 @@ function roundMileageForDisplay(value: number): number {
 }
 
 export default function DailyReportView() {
-  const maxDate = shanghaiYmd();
+  const maxDate = shanghaiYmd(-1);
   const [selectedDate, setSelectedDate] = useState(initialReportDate);
   const [report, setReport] = useState<DailyMileageReport | null>(null);
   const [loading, setLoading] = useState(true);
@@ -841,6 +883,8 @@ export default function DailyReportView() {
 
   useEffect(() => {
     let active = true;
+    let finishTimer: number | undefined;
+    const loadingStartedAt = performance.now();
     setLoading(true);
     setError('');
     updateReportDateInUrl(selectedDate);
@@ -855,8 +899,17 @@ export default function DailyReportView() {
         if (!active) return;
         setError(cause instanceof Error ? cause.message : '日报加载失败');
       })
-      .finally(() => { if (active) setLoading(false); });
+      .finally(() => {
-    return () => { active = false; };
+        if (!active) return;
+        const delay = Math.max(0, MIN_REPORT_LOADING_MS - (performance.now() - loadingStartedAt));
+        finishTimer = window.setTimeout(() => {
+          if (active) setLoading(false);
+        }, delay);
+      });
+    return () => {
+      active = false;
+      if (finishTimer != null) window.clearTimeout(finishTimer);
+    };
   }, [selectedDate]);
 
   const highMileageRate = report && report.totals.operatingCount > 0
@@ -871,7 +924,7 @@ export default function DailyReportView() {
     note => note.message !== '日行驶总里程延续人工汇报口径，包含库存车辆产生的里程。',
   ) || [];
 
-  if (loading && !report) return <LoadingState label="正在生成里程日报" />;
+  if (loading && !report) return <DailyReportLoadingOverlay reportDate={selectedDate} />;
   if (!report) return <ErrorState message={error || '日报接口未返回有效数据'} />;
 
   const trendGroup = trendTargetId == null ? null : report.groups.find(group => group.targetId === trendTargetId) || null;
@@ -881,7 +934,7 @@ export default function DailyReportView() {
   const trendColor = trendGroup ? '#0f766e' : '#2563eb';
 
   return (
-    <div className="space-y-3 pb-5">
+    <div className="relative space-y-3 pb-5" aria-busy={loading}>
       <section className="rounded-xl border border-slate-200 bg-white px-4 py-3 shadow-sm">
         <div className="flex flex-col gap-3 lg:flex-row lg:items-center lg:justify-between">
           <div className="min-w-0">
@@ -917,15 +970,6 @@ export default function DailyReportView() {
               <ChevronLeft size={16} />
             </button>
             <ReportDatePicker value={selectedDate} maxDate={maxDate} onChange={setSelectedDate} />
-            <button
-              type="button"
-              onClick={() => setSelectedDate(maxDate)}
-              disabled={selectedDate === maxDate}
-              className="flex h-9 shrink-0 items-center justify-center rounded-lg border border-slate-200 bg-white px-2.5 text-[11px] font-black text-blue-600 hover:border-blue-200 hover:bg-blue-50 disabled:cursor-not-allowed disabled:opacity-35"
-              title="回到今天"
-            >
-              今天
-            </button>
             <button
               type="button"
               onClick={() => setSelectedDate(dateShift(selectedDate, 1))}
@@ -1139,11 +1183,9 @@ export default function DailyReportView() {
         ))}
       </SurfaceCard>
 
-      {loading ? (
+      <AnimatePresence initial={false}>
-        <div className="fixed bottom-5 right-5 z-50 flex items-center gap-2 rounded-lg bg-slate-900 px-3 py-2 text-xs font-black text-white shadow-xl">
+        {loading ? <DailyReportLoadingOverlay reportDate={selectedDate} /> : null}
-          <RefreshCw size={14} className="animate-spin" />正在切换日报
+      </AnimatePresence>
-        </div>
-      ) : null}
       {error ? <ErrorState message={error} /> : null}
     </div>
   );