fix, wip: don't show preview for non-image fragments

webui/src/components/display/blobs/FragmentViewer.svelte

@@ -12,8 +12,13 @@
 
   $: objectAddress = String($entity?.get("ANNOTATES") || "");
 
+  $: imageFragment = ["x=", "y=", "w=", "h="].every((q) =>
+    String($entity?.get("W3C_FRAGMENT_SELECTOR")).includes(q)
+  );
+
   let imageLoaded = false;
   $: imageLoaded && dispatch("loaded");
+  $: if ($entity && !imageFragment) imageLoaded = true;
 </script>
 
 <div class="fragment-viewer">
@@ -21,6 +26,7 @@
     <Spinner />
   {/if}
   {#if $entity}
+    {#if imageFragment}
       <img
         class="preview-image"
         class:imageLoaded
@@ -33,6 +39,7 @@
         draggable="false"
       />
     {/if}
+  {/if}
 </div>
 
 <style lang="scss">