feat(ui): 升級資產卡片展示，支持累計分紅顯示並修復數據格式化兜底

app/dashboard/page.tsx

@@ -67,11 +67,12 @@ export default async function DashboardPage() {
             const posPnl = new Big(pos.pnlCny);
             const posPnlPositive = posPnl.gte(0);
             const formattedPosPnl = formatAmount(pos.pnlCny);
+            const formattedDividends = formatAmount(pos.accumulatedDividendsCny);
 
             const posPnlNative = new Big(pos.pnlNative);
             const posPnlNativePositive = posPnlNative.gte(0);
 
-            const avgCostFormatted = !new Big(pos.avgCost).eq(0) && pos.avgCost !== '0' ? formatAmount(pos.avgCost) : '-';
+            const avgCostFormatted = !new Big(pos.avgCost).eq('0') ? formatAmount(pos.avgCost) : '-';
             const dilutedCostFormatted = !new Big(pos.dilutedCost).eq(0) && pos.dilutedCost !== '0' ? formatAmount(pos.dilutedCost) : '-';
 
             return (
@@ -141,6 +142,12 @@ export default async function DashboardPage() {
                         {posPnlPositive ? '+' : ''}{formattedPosPnl}
                       </span>
                     </div>
+                    <div className="flex justify-between opacity-50">
+                      <span className="text-muted-foreground">累計分紅</span>
+                      <span className="font-medium">
+                        {formattedDividends}
+                      </span>
+                    </div>
                   </div>
                 </CardContent>
               </Card>