feat: sort outbound selection list by warehouse location to optimize pick path

inventory-web/src/views/outbound/Selection.vue

@@ -314,8 +314,21 @@ const bomSets = ref(1)
 const currentTime = ref('')
 
 // --- 计算属性 ---
+// ★ 优化：按库位排序，空库位排最后
 const validSelectedItems = computed(() => {
-  return selectedItems.value.filter(item => item.export_quantity > 0)
+  const filtered = selectedItems.value.filter(item => item.export_quantity > 0)
+  return [...filtered].sort((a, b) => {
+    const locA = a.warehouse_location || a.warehouse_loc || '';
+    const locB = b.warehouse_location || b.warehouse_loc || '';
+    
+    // 空库位沉底
+    if (!locA && locB) return 1;
+    if (locA && !locB) return -1;
+    if (!locA && !locB) return 0;
+    
+    // 自然排序（支持 A-10 排在 A-2 后面）
+    return locA.localeCompare(locB, 'zh-CN', { numeric: true });
+  });
 })
 
 const totalExportCount = computed(() => {