update

frontend/paper-trading.html

@@ -1321,7 +1321,7 @@
                 </div>
 
                 <!-- 收益率图表 -->
-                <div v-if="activeTab === 'returns'">
+                <div v-show="activeTab === 'returns'">
                     <h3 style="color: var(--text-primary); font-weight: 300; margin-bottom: 16px;">每日收益率</h3>
 
                     <!-- 汇总卡片 -->
@@ -1399,7 +1399,7 @@
                                 </tr>
                             </thead>
                             <tbody>
-                                <tr v-for="day in dailyReturns" :key="day.date">
+                                <tr v-for="day in displayedDailyReturns" :key="day.date">
                                     <td>{{ day.date }}</td>
                                     <td :class="day.return_percent >= 0 ? 'positive' : 'negative'">
                                         {{ day.return_percent >= 0 ? '+' : '' }}{{ day.return_percent }}%
@@ -2147,13 +2147,25 @@
                     if (tradingDays === 0) return 0;
                     const totalReturn = this.dailyReturns.reduce((sum, d) => sum + d.return_percent, 0);
                     return totalReturn / tradingDays;
+                },
+
+                // 显示的每日收益率（倒序，前15条）
+                displayedDailyReturns() {
+                    return [...this.dailyReturns].reverse().slice(0, 15);
                 }
             },
             watch: {
-                // 监听标签页切换，加载收益率数据
+                // 监听标签页切换，加载收益率数据并渲染图表
                 activeTab(newTab) {
-                    if (newTab === 'returns' && this.dailyReturns.length === 0) {
-                        this.fetchDailyReturns();
+                    if (newTab === 'returns') {
+                        if (this.dailyReturns.length === 0) {
+                            this.fetchDailyReturns();
+                        } else {
+                            // 数据已存在，需要重新渲染图表
+                            this.$nextTick(() => {
+                                this.renderCharts();
+                            });
+                        }
                     }
                 }
             }