fix: annotation overlay in recipe preview and measure view

annotationViewer.drawAnnotations() now handles the editor format
(objects array with marker/arrow/area) in addition to the legacy
format (markers array). This fixes missing overlay in recipe preview
and task execution views.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/static/js/annotation-viewer.js

@@ -168,8 +168,17 @@ function annotationViewer() {
      * Disegna tutti i markers sulle annotazioni
      */
     drawAnnotations() {
-      if (!this.annotations || !this.annotations.markers) return;
+      if (!this.annotations) return;
 
+      // Editor format (objects array from annotation-editor.js)
+      if (this.annotations.objects) {
+        var annoScale = this.canvas.width / (this.annotations.width || this.canvas.width);
+        _drawEditorAnnotations(this.ctx, this.annotations, annoScale);
+        return;
+      }
+
+      // Legacy format (markers array)
+      if (!this.annotations.markers) return;
       for (const marker of this.annotations.markers) {
         const isActive = this.activeMarker === marker.marker_number;
         this.drawMarker(marker, isActive);