center preview on upload

css/upload.css

@@ -4,6 +4,9 @@ body .pure-g {
 details svg, details img {
     background-color: white
 }
+.row-cols-lg-2:has(.bg-yellow) {
+  justify-content: center;
+}
 .card-img-top {
     width: 40%;
     margin: 10% 30% 10% 30%;

util-sqlpage/upload/form.sql

@@ -41,10 +41,11 @@ END AS value
 WHERE NOT :view
 ;
 SELECT 'card' as component
-, 1 as columns
+, 2 as columns
 WHERE :view
 ;
 SELECT 'Preview' as title
+, :tabler_color AS color
 , CASE WHEN substr(:mime_type, 0, instr(:mime_type, '/')) = 'image' THEN :content ELSE NULL END AS top_image
 , '
 Uploaded file type: ' || COALESCE(:mime_type, 'null') ||'