feat: added product image to printing jobs api

api_v1/views/printing/serializers.py

@@ -256,6 +256,7 @@ class PrintingJobListSerializer(serializers.ModelSerializer):
     """印染款式明细列表序列化器"""
     printing_order_id = serializers.CharField(source='printing_order.human_id', read_only=True)
     product_name = serializers.CharField(source='product.name', read_only=True)
+    product_image_url = serializers.SerializerMethodField()
     status = serializers.CharField(read_only=True)
     work_state_display = serializers.SerializerMethodField()
     is_completed = serializers.BooleanField(read_only=True)
@@ -266,6 +267,7 @@ class PrintingJobListSerializer(serializers.ModelSerializer):
         model = models.PrintingJob
         fields = [
             'id', 'original_id', 'printing_order', 'printing_order_id', 'product', 'product_name',
+            'product_image_url',
             'quantity', 'unit', 'size', 'pieces', 'description',
             'work_state', 'work_state_display',
             'status', 'is_completed', 'business_object_id',
@@ -278,6 +280,12 @@ class PrintingJobListSerializer(serializers.ModelSerializer):
         """安全地获取 business_object_id"""
         return obj.business_object.id if obj.business_object else None
 
+    def get_product_image_url(self, obj):
+        """获取产品图片 URL（优先 mdy_image_url，其次从 description 提取）"""
+        if obj.product:
+            return obj.product.get_primary_image_url()
+        return None
+
     def get_work_state_display(self, obj):
         return obj.get_work_state_display()