feat: 添加商品选择页面

src/pages/order/create.vue

@@ -22,14 +22,7 @@
     <view class="section">
       <view class="section-header">
         <text class="section-title">商品明细</text>
-        <picker 
-          mode="selector" 
-          :range="productList" 
-          range-key="name" 
-          @change="onProductSelect"
-        >
-          <text class="add-btn">+ 添加商品</text>
-        </picker>
+        <text class="add-btn" @click="goToSelectProduct">+ 添加商品</text>
       </view>
       
       <view v-for="(item, index) in orderItems" :key="index" class="order-item">
@@ -188,8 +181,10 @@ export default {
     selectCustomer(e) {
       this.selectedCustomer = this.customers[e.detail.value]
     },
-    onProductSelect(e) {
-      const product = this.productList[e.detail.value]
+    goToSelectProduct() {
+      uni.navigateTo({ url: '/pages/product/select' })
+    },
+    addProduct(product) {
       // 检查是否已添加
       const exists = this.orderItems.find(item => item.productId === product.productId)
       if (exists) {