fix: 修复系统恢复默认样式不生效的缺陷

apps/dataset/serializers/image_serializers.py

@@ -41,4 +41,7 @@ class ImageSerializer(serializers.Serializer):
                 raise NotFound404(404, "不存在的图片")
             if image.image_name.endswith('.svg'):
                 return HttpResponse(image.image, status=200, headers={'Content-Type': 'image/svg+xml'})
+            # gif
+            elif image.image_name.endswith('.gif'):
+                return HttpResponse(image.image, status=200, headers={'Content-Type': 'image/gif'})
             return HttpResponse(image.image, status=200, headers={'Content-Type': 'image/png'})

ui/src/views/theme/index.vue

@@ -305,7 +305,7 @@ function resetTheme() {
 
 function resetForm(val: string) {
   themeForm.value =
-    val === 'base'
+    val === 'login'
       ? {
           ...themeForm.value,
           theme: themeForm.value.theme,