fix: 优化交易记录时间格式

- 今天的交易只显示时间 (16:15)
- 非今天的交易显示月-日 时间 (03-24 16:15)
- 缩短时间字符串，避免布局变形

pages/detail/detail.vue

@@ -266,7 +266,7 @@
       <view v-else class="timeline-box">
         <view class="timeline-item" v-for="(log, k) in logs" :key="k">
           <view class="tl-left">
-            <text class="tl-datetime">{{ log.date }} {{ log.time || '' }}</text>
+            <text class="tl-datetime">{{ formatLogTime(log.date, log.time) }}</text>
           </view>
           
           <view class="tl-line">
@@ -577,6 +577,21 @@ const getCurrencySymbol = (currency?: string): string => {
   return symbols[currency || 'CNY'] || '¥';
 };
 
+const formatLogTime = (date?: string, time?: string): string => {
+  if (!date) return '';
+  const today = new Date();
+  const todayStr = today.toISOString().split('T')[0];
+  const isToday = date === todayStr;
+  
+  const datePart = isToday ? '' : date.slice(5);
+  const timePart = time ? time.slice(0, 5) : '';
+  
+  if (isToday) {
+    return timePart || '今天';
+  }
+  return datePart + (timePart ? ' ' + timePart : '');
+};
+
 const portfolioId = ref<string>('');
 const portfolioData = ref<any>({
   id: '',