fix: 修复策略编辑页股票搜索报错和渲染问题：1. 修复TypeError报错；2. 降低搜索触发门槛为1位；3. 适配后端返回小写字段

pages/strategies/edit/edit.vue

@@ -121,8 +121,11 @@
                         :key="idx"
                         @click="selectStock(result)"
                       >
-                        <text class="item-ticker">{{ result.Ticker }}</text>
-                        <text class="item-exchange">{{ result.Exchange }}</text>
+                        <view class="item-left">
+                          <text class="item-ticker">{{ result.ticker }}</text>
+                          <text class="item-type" v-if="result.assetType">{{ result.assetType }}</text>
+                        </view>
+                        <text class="item-exchange">{{ result.exchange }}</text>
                       </view>
                     </view>
                   </view>
@@ -244,7 +247,9 @@ const searchTimer = ref(null);
 const searchStock = async (keyword, assetIndex) => {
   // 防抖
   if (searchTimer.value) clearTimeout(searchTimer.value);
-  if (!keyword || keyword.length < 2) {
+  // 赋值当前激活的搜索下标
+  activeAssetIndex.value = assetIndex;
+  if (!keyword || keyword.length < 1) {
     searchResults.value = [];
     activeAssetIndex.value = -1;
     return;
@@ -271,7 +276,7 @@ const searchStock = async (keyword, assetIndex) => {
 const selectStock = (result) => {
   const asset = formData.value.assets[result.assetIndex];
   if (asset) {
-    asset.symbol = result.Ticker;
+    asset.symbol = result.ticker;
   }
   searchResults.value = [];
   activeAssetIndex.value = -1;
@@ -822,12 +827,27 @@ onMounted(() => {
   background-color: #F3F4F6;
 }
 
+.item-left {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: 12rpx;
+}
+
 .item-ticker {
   font-size: 26rpx;
   font-weight: 600;
   color: #1F2937;
 }
 
+.item-type {
+  font-size: 18rpx;
+  color: #064E3B;
+  background-color: #D1FAE5;
+  padding: 2rpx 8rpx;
+  border-radius: 4rpx;
+}
+
 .item-exchange {
   font-size: 22rpx;
   color: #9CA3AF;