fix: 微信小程序兼容性调整

- config.vue: picker 组件使用条件编译，H5/APP使用u-picker，微信小程序使用原生picker
- detail.vue: 交易表单input使用条件编译，H5/APP使用u-input，微信小程序使用原生input
- 保留u-button和u-toast在所有平台使用

pages/config/config.vue

@@ -23,6 +23,7 @@
 
       <view class="form-item">
         <text class="label">选择逻辑模板</text>
+        <!-- #ifdef H5 || APP-PLUS -->
         <u-picker
           :show="showStrategyPicker"
           :columns="[strategies.map(s => s.name)]"
@@ -39,11 +40,25 @@
             <u-icon name="arrow-down" size="14" color="#9CA3AF"></u-icon>
           </view>
         </u-picker>
+        <!-- #endif -->
+        <!-- #ifdef MP-WEIXIN -->
+        <picker @change="onStrategyChange" :value="strategyIndex" :range="strategies" range-key="name">
+          <view class="picker-box" @click="showStrategyPicker = true">
+            <view class="flex-row items-center gap-2" v-if="selectedStrategy">
+              <view class="strategy-dot" :style="{ backgroundColor: selectedStrategy.color }"></view>
+              <text class="picker-text">{{ selectedStrategy.name }}</text>
+            </view>
+            <text class="picker-placeholder" v-else>点击选择逻辑规则</text>
+            <uni-icons type="bottom" size="14" color="#9CA3AF"></uni-icons>
+          </view>
+        </picker>
+        <!-- #endif -->
         <text class="helper-text" v-if="selectedStrategy">{{ selectedStrategy.desc }}</text>
       </view>
 
       <view class="form-item">
         <text class="label">组合币种</text>
+        <!-- #ifdef H5 || APP-PLUS -->
         <u-picker
           :show="showCurrencyPicker"
           :columns="[currencyList.map(c => c.name)]"
@@ -56,6 +71,15 @@
             <u-icon name="arrow-down" size="14" color="#9CA3AF"></u-icon>
           </view>
         </u-picker>
+        <!-- #endif -->
+        <!-- #ifdef MP-WEIXIN -->
+        <picker @change="onCurrencyChange" :value="currencyIndex" :range="currencyList" range-key="name">
+          <view class="picker-box" @click="showCurrencyPicker = true">
+            <text class="picker-text">{{ currencyList[currencyIndex].name }}</text>
+            <uni-icons type="bottom" size="14" color="#9CA3AF"></uni-icons>
+          </view>
+        </picker>
+        <!-- #endif -->
         <text class="helper-text">创建后币种不可修改，所有交易只能使用该币种</text>
       </view>
     </view>
@@ -190,6 +214,30 @@ const currencyIndex = ref(0); // 默认CNY
 const showStrategyPicker = ref(false);
 const showCurrencyPicker = ref(false);
 
+// 小程序原生 picker 事件处理
+const onStrategyChange = (e) => {
+  strategyIndex.value = e.detail.value;
+  showStrategyPicker.value = false;
+  
+  // 调用原有的策略变更逻辑
+  const strategy = strategies.value[strategyIndex.value];
+  if (strategy && strategy.parameters && strategy.parameters.assets) {
+    form.value.stocks = strategy.parameters.assets.map(asset => ({
+      name: asset.symbol,
+      price: '',
+      amount: '',
+      date: ''
+    }));
+  } else {
+    form.value.stocks = [{ name: '', price: '', amount: '', date: '' }];
+  }
+};
+
+const onCurrencyChange = (e) => {
+  currencyIndex.value = e.detail.value;
+  showCurrencyPicker.value = false;
+};
+
 // 防止重复请求的标志
 let isFetching = false;
 

pages/detail/detail.vue

@@ -249,6 +249,7 @@
           <view class="form-item">
             <text class="form-label">{{ transactionType === 'sell' ? '选择持仓' : '股票代码' }}</text>
             <view class="relative">
+              <!-- #ifdef H5 || APP-PLUS -->
               <u-input 
                 v-model="transactionForm.stockCode"
                 :placeholder="transactionType === 'sell' ? '点击选择要卖出的持仓' : '请输入股票代码搜索'"
@@ -266,6 +267,17 @@
                 @input="onStockInput"
                 @click="handleStockInputClick"
               />
+              <!-- #endif -->
+              <!-- #ifdef MP-WEIXIN -->
+              <input 
+                v-model="transactionForm.stockCode"
+                class="stock-input"
+                :placeholder="transactionType === 'sell' ? '点击选择要卖出的持仓' : '请输入股票代码搜索'"
+                :disabled="transactionType === 'sell'"
+                @input="onStockInput"
+                @click="handleStockInputClick"
+              />
+              <!-- #endif -->
               <!-- 搜索下拉列表 -->
               <view class="search-dropdown" v-if="searchResults.length > 0">
                 <view