fix(printer): 解决图片类型设置逻辑问题

- 添加source为空时的图片类型判断逻辑
- 当source为空时将图片类型设置为PUZZLE
- 保持原有source不为空时的IPC类型设置逻辑
- 确保PHONE类型的设置逻辑不受影响

src/main/java/com/ycwl/basic/service/printer/impl/PrinterServiceImpl.java

@@ -889,7 +889,11 @@ public class PrinterServiceImpl implements PrinterService {
             SourceEntity source = null;
             if (item.getSourceId() != null && item.getSourceId() > 0) {
                 source = sourceMapper.getEntity(item.getSourceId());
-                context.setSource(ImageSource.IPC);
+                if (source == null) {
+                    context.setImageType(ImageType.PUZZLE); // 特殊
+                } else {
+                    context.setSource(ImageSource.IPC);
+                }
             } else if (item.getSourceId() == null) {
                 context.setSource(ImageSource.PHONE);
             } else {