[ui] fix annotation error on img reload

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

@@ -25,6 +25,7 @@
       ) => void);
     clearAnnotations: () => void;
     readOnly: boolean;
+    destroy: () => void;
   }
 
   interface W3cAnnotation {
@@ -77,11 +78,12 @@
   let a8sLinkAddress: string;
 
   async function loaded() {
-    if (imageLoaded) return;
-    imageLoaded = true;
-
     const { Annotorious } = await import("@recogito/annotorious");
 
+    if (anno) {
+      anno.destroy();
+    }
+
     anno = new Annotorious({
       image: imageEl,
       drawOnSingleClick: true,