fix: don't allow max-width bigger, than container size for image preview

https://web.tracklify.com/project/2b7ZVgE5/AdminForth/1381/6LEetP2t/mobile-view

Author: yaroslav8765

custom/preview.vue

@@ -127,7 +127,7 @@ const maxWidth = computed(() => {
     ? (props.meta.maxShowWidth || props.meta.maxWidth)
     : (props.meta.maxListWidth || props.meta.maxWidth);
 
-  return width ? { maxWidth: width } : {};
+  return width ? { maxWidth: `min(100%, ${width})` } : {};
 });
 
 const minWidth = computed(() => {