feat(ledger): 引入 latestPrice 字段与历史成本追踪，实装 P&L 盈亏计算引擎

app/dashboard/assets/page.tsx

@@ -1,5 +1,6 @@
 import { getAssets } from '@/actions/asset';
 import { AddAssetDialog } from '@/components/assets/add-asset-dialog';
+import { UpdatePriceDialog } from '@/components/assets/update-price-dialog';
 import {
   Table,
   TableBody,
@@ -15,33 +16,35 @@ export default async function AssetsPage() {
 
   const typeLabels: Record<string, string> = {
     STOCK: '股票',
-    CRYPTO: '加密货币',
-    CASH: '现金',
+    CRYPTO: '加密貨幣',
+    CASH: '現金',
   };
 
   return (
     <div className="space-y-6">
       <div className="flex items-center justify-between">
-        <h1 className="text-2xl font-bold">资产列表</h1>
+        <h1 className="text-2xl font-bold">資產列表</h1>
         <AddAssetDialog />
       </div>
 
       <div className="rounded-md border">
         <Table>
-          <TableCaption>数据库中所有已录入的资产</TableCaption>
+          <TableCaption>數據庫中所有已錄入的資產</TableCaption>
           <TableHeader>
             <TableRow>
-              <TableHead>资产代码</TableHead>
-              <TableHead>类型</TableHead>
-              <TableHead>基础币种</TableHead>
-              <TableHead>创建时间</TableHead>
+              <TableHead>資產代碼</TableHead>
+              <TableHead>類型</TableHead>
+              <TableHead>基礎幣種</TableHead>
+              <TableHead>當前市價 (Latest Price)</TableHead>
+              <TableHead>創建時間</TableHead>
+              <TableHead>操作</TableHead>
             </TableRow>
           </TableHeader>
           <TableBody>
             {assets.length === 0 ? (
               <TableRow>
-                <TableCell colSpan={4} className="text-center text-muted-foreground">
-                  暂无资产，点击"添加资产"按钮录入第一个资产
+                <TableCell colSpan={6} className="text-center text-muted-foreground">
+                  暫無資產，點擊"添加資產"按鈕錄入第一個資產
                 </TableCell>
               </TableRow>
             ) : (
@@ -50,11 +53,15 @@ export default async function AssetsPage() {
                   <TableCell className="font-medium">{asset.symbol}</TableCell>
                   <TableCell>{typeLabels[asset.type] || asset.type}</TableCell>
                   <TableCell>{asset.baseCurrency}</TableCell>
+                  <TableCell>{asset.latestPrice}</TableCell>
                   <TableCell>
                     {asset.createdAt
                       ? new Date(asset.createdAt).toLocaleString('zh-CN')
                       : '-'}
                   </TableCell>
+                  <TableCell>
+                    <UpdatePriceDialog assetId={asset.id} currentPrice={asset.latestPrice || '0'} />
+                  </TableCell>
                 </TableRow>
               ))
             )}

app/dashboard/page.tsx

@@ -2,6 +2,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { getPortfolioSummary } from '@/actions/portfolio';
 import { formatQuantity, formatAmount } from '@/lib/formatters';
 import AllocationChart from '@/components/dashboard/allocation-chart';
+import Big from 'big.js';
 
 const CHART_COLORS = [
   '#3b82f6',
@@ -13,9 +14,11 @@ const CHART_COLORS = [
 ];
 
 export default async function DashboardPage() {
-  const { positions, totalCnyValue, chartData } = await getPortfolioSummary();
+  const { positions, totalCnyValue, chartData, totalPnlCny } = await getPortfolioSummary();
 
   const formattedTotal = formatAmount(totalCnyValue);
+  const formattedPnl = formatAmount(totalPnlCny);
+  const pnlIsPositive = new Big(totalPnlCny).gte(0);
 
   const displayChartData = chartData.map((item) => ({
     ...item,
@@ -42,6 +45,12 @@ export default async function DashboardPage() {
               总资产 (CNY)
             </span>
           </div>
+          <div className="mt-2 flex items-center gap-2">
+            <span className="text-sm text-muted-foreground">总盈亏:</span>
+            <span className={`text-lg font-semibold ${pnlIsPositive ? 'text-green-500' : 'text-red-500'}`}>
+              {pnlIsPositive ? '+' : ''}{formattedPnl}
+            </span>
+          </div>
         </CardContent>
       </Card>
 
@@ -53,38 +62,56 @@ export default async function DashboardPage() {
             </CardContent>
           </Card>
         ) : (
-          positions.map((pos) => (
-            <Card key={pos.assetId}>
-              <CardHeader>
-                <CardTitle className="flex items-center justify-between">
-                  <span>{pos.symbol}</span>
-                  <span className="text-sm font-normal text-muted-foreground">
-                    {pos.type}
-                  </span>
-                </CardTitle>
-              </CardHeader>
-              <CardContent>
-                <div className="space-y-2">
-                  <div className="flex justify-between">
-                    <span className="text-muted-foreground">持仓数量</span>
-                    <span className="font-medium">
-                      {formatQuantity(pos.quantity, pos.type)}
+          positions.map((pos) => {
+            const posPnl = new Big(pos.pnlCny);
+            const posPnlPositive = posPnl.gte(0);
+            const formattedPosPnl = formatAmount(pos.pnlCny);
+
+            return (
+              <Card key={pos.assetId}>
+                <CardHeader>
+                  <CardTitle className="flex items-center justify-between">
+                    <span>{pos.symbol}</span>
+                    <span className="text-sm font-normal text-muted-foreground">
+                      {pos.type}
                     </span>
+                  </CardTitle>
+                </CardHeader>
+                <CardContent>
+                  <div className="space-y-2">
+                    <div className="flex justify-between">
+                      <span className="text-muted-foreground">持仓数量</span>
+                      <span className="font-medium">
+                        {formatQuantity(pos.quantity, pos.type)}
+                      </span>
+                    </div>
+                    <div className="flex justify-between">
+                      <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 className="flex justify-between">
+                      <span className="text-muted-foreground">成本 (CNY)</span>
+                      <span className="font-medium">
+                        ¥{formatAmount(pos.totalCostCny)}
+                      </span>
+                    </div>
+                    <div className="flex justify-between">
+                      <span className="text-muted-foreground">盈亏</span>
+                      <span className={`font-semibold ${posPnlPositive ? 'text-green-500' : 'text-red-500'}`}>
+                        {posPnlPositive ? '+' : ''}{formattedPosPnl}
+                      </span>
+                    </div>
                   </div>
-                  <div className="flex justify-between">
-                    <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>
-          ))
+                </CardContent>
+              </Card>
+            );
+          })
         )}
       </div>