feat(ui): 首页挂载重构历史触发按钮，打通历史净值回溯全链路

app/dashboard/page.tsx

@@ -22,7 +22,7 @@ import {
 import { toast } from 'sonner';
 import { getPortfolioSummary } from '@/actions/portfolio';
 import { getAssets } from '@/actions/asset';
-import { recordDailySnapshot, getSnapshots } from '@/actions/snapshots';
+import { recordDailySnapshot, getSnapshots, reconstructPortfolioHistory } from '@/actions/snapshots';
 import { formatQuantity, formatAmount } from '@/lib/formatters';
 import AllocationChart from '@/components/dashboard/allocation-chart';
 import NetWorthChart from '@/components/dashboard/net-worth-chart';
@@ -201,7 +201,29 @@ export default function DashboardPage() {
       <Card>
         <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
           <CardTitle className="text-sm font-medium">总资产概览</CardTitle>
-          <SyncButton />
+          <div className="flex items-center gap-2">
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => {
+                startTransition(async () => {
+                  toast.loading('正在重构历史走势...');
+                  const result = await reconstructPortfolioHistory();
+                  toast.dismiss();
+                  if (result.success) {
+                    toast.success(`重构成功，已填充 ${result.daysReconstructed} 天历史数据`);
+                    setSnapshots(await getSnapshots({ limit: 30 }));
+                  } else if (result.message) {
+                    toast.info(result.message);
+                  }
+                });
+              }}
+              disabled={isPending}
+            >
+              {isPending ? '重构中...' : '重构历史走势'}
+            </Button>
+            <SyncButton />
+          </div>
         </CardHeader>
         <CardContent className="pt-6 pb-6">
           <div className="flex items-center gap-3">