feat(dashboard): 接入汇率引擎，实现多资产交叉汇率折算与 CNY 统一计价看板

app/dashboard/page.tsx

@@ -1,6 +1,6 @@
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
-import { getPortfolioPositions } from '@/actions/portfolio';
-import { formatQuantity } from '@/lib/formatters';
+import { getPortfolioSummary } from '@/actions/portfolio';
+import { formatQuantity, formatAmount } from '@/lib/formatters';
 import AllocationChart from '@/components/dashboard/allocation-chart';
 
 const CHART_COLORS = [
@@ -13,12 +13,13 @@ const CHART_COLORS = [
 ];
 
 export default async function DashboardPage() {
-  const positions = await getPortfolioPositions();
+  const { positions, totalCnyValue, chartData } = await getPortfolioSummary();
 
-  const chartData = positions.map((pos, index) => ({
-    name: pos.symbol,
-    value: Number(pos.quantity),
-    fill: CHART_COLORS[index % CHART_COLORS.length],
+  const formattedTotal = formatAmount(totalCnyValue);
+
+  const displayChartData = chartData.map((item) => ({
+    ...item,
+    value: Number(item.value),
   }));
 
   return (
@@ -28,6 +29,22 @@ export default async function DashboardPage() {
         <p className="text-muted-foreground">您的跨界记账中枢。</p>
       </div>
 
+      <Card>
+        <CardContent className="pt-6 pb-6">
+          <div className="flex items-center gap-3">
+            <span className="text-2xl font-semibold text-muted-foreground">
+              ¥
+            </span>
+            <span className="text-5xl font-bold">
+              {formattedTotal}
+            </span>
+            <span className="text-xl text-muted-foreground ml-2">
+              总资产 (CNY)
+            </span>
+          </div>
+        </CardContent>
+      </Card>
+
       <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
         {positions.length === 0 ? (
           <Card>
@@ -58,6 +75,12 @@ export default async function DashboardPage() {
                     <span className="text-muted-foreground">结算币种</span>
                     <span className="font-medium">{pos.baseCurrency}</span>
                   </div>
+                  <div className="flex justify-between">
+                    <span className="text-muted-foreground">CNY 估值</span>
+                    <span className="font-medium text-green-600">
+                      ¥{formatAmount(pos.cnyValue)}
+                    </span>
+                  </div>
                 </div>
               </CardContent>
             </Card>
@@ -70,7 +93,7 @@ export default async function DashboardPage() {
           <CardTitle>资产分布</CardTitle>
         </CardHeader>
         <CardContent>
-          <AllocationChart data={chartData} />
+          <AllocationChart data={displayChartData} />
         </CardContent>
       </Card>
     </div>