[misc] update avatar utils to handle group avatars

Author: GamerGirlandCo

modules/templates/util_avatar.go

@@ -4,6 +4,7 @@
 package templates
 
 import (
+	group_model "code.gitea.io/gitea/models/group"
 	"context"
 	"html"
 	"html/template"
@@ -58,6 +59,11 @@ func (au *AvatarUtils) Avatar(item any, others ...any) template.HTML {
 		if src != "" {
 			return AvatarHTML(src, size, class, t.AsUser().DisplayName())
 		}
+	case *group_model.Group:
+		src := t.AvatarLinkWithSize(size * setting.Avatar.RenderedSizeFactor)
+		if src != "" {
+			return AvatarHTML(src, size, class, t.Name)
+		}
 	}
 
 	return AvatarHTML(avatars.DefaultAvatarLink(), size, class, "")