feat: 卖出功能优化，点击减少自动展示已有持仓列表供选择

pages/detail/detail.vue

@@ -159,14 +159,14 @@
         
         <view class="form-content">
           <view class="form-item relative">
-            <text class="form-label">股票代码</text>
+            <text class="form-label">{{ transactionType === 'sell' ? '选择持仓' : '股票代码' }}</text>
             <input 
               v-model="transactionForm.stockCode" 
               class="form-input" 
-              placeholder="请输入股票代码"
+              :placeholder="transactionType === 'sell' ? '请选择要卖出的持仓' : '请输入股票代码'"
               @input="(e) => searchStock(e.detail.value)"
             />
-            <!-- 搜索下拉列表 -->
+            <!-- 搜索下拉列表/持仓列表 -->
             <view class="search-dropdown" v-if="searchResults.length > 0">
               <view 
                 class="dropdown-item" 
@@ -175,10 +175,11 @@
                 @click="selectStock(result)"
               >
                 <view class="item-left">
-                  <text class="item-ticker">{{ result.ticker }}</text>
+                  <text class="item-ticker">{{ result.ticker || result.stockCode }}</text>
+                  <text class="item-name">{{ result.name || result.stockName }}</text>
                   <text class="item-type" v-if="result.assetType">{{ result.assetType }}</text>
                 </view>
-                <text class="item-exchange">{{ result.exchange }}</text>
+                <text class="item-exchange">{{ result.exchange || '' }}</text>
               </view>
             </view>
           </view>
@@ -334,17 +335,18 @@ const searchStock = async (keyword) => {
 };
 
 const selectStock = (result) => {
-  transactionForm.value.stockCode = result.ticker || result.Ticker;
+  transactionForm.value.stockCode = result.ticker || result.Ticker || result.stockCode;
   // 自动填充对应货币
-  if (result.priceCurrency) {
+  const currency = result.priceCurrency || result.currency;
+  if (currency) {
     const currencyMap = {
       'CNY': 0,
       'USD': 1,
       'HKD': 2
     };
-    if (currencyMap[result.priceCurrency] !== undefined) {
-      currencyIndex.value = currencyMap[result.priceCurrency];
-      transactionForm.value.currency = result.priceCurrency;
+    if (currencyMap[currency] !== undefined) {
+      currencyIndex.value = currencyMap[currency];
+      transactionForm.value.currency = currency;
     }
   }
   searchResults.value = [];
@@ -413,6 +415,14 @@ const handleBuy = () => {
 const handleSell = () => {
   transactionType.value = 'sell';
   resetTransactionForm();
+  // 卖出时自动填充持仓列表作为可选
+  searchResults.value = positions.value.map(pos => ({
+    ticker: pos.stockCode,
+    name: pos.stockName,
+    assetType: pos.assetType || 'Stock',
+    priceCurrency: pos.currency,
+    exchange: ''
+  }));
   showTransactionForm.value = true;
 };
 
@@ -425,6 +435,8 @@ const resetTransactionForm = () => {
     transactionDate: getCurrentDate(),
     remark: ''
   };
+  // 重置搜索结果
+  searchResults.value = [];
 };
 
 const submitTransaction = async () => {