fix preview

src/components/ThumbnailStrip.vue

@@ -28,8 +28,14 @@ const onSelect = (index: number) => {
             @click="onSelect(index)"
         >
           <div class="h-full w-full bg-gray-800 flex items-center justify-center overflow-hidden rounded border border-gray-600">
-             <!-- Use actual thumbnail path later -->
-             <img :src="convertFileSrc(item.path)" class="w-full h-full object-cover" loading="lazy" />
+             <!-- Use generated thumbnail -->
+             <img 
+                :src="convertFileSrc(item.thumbnail)" 
+                class="w-full h-full object-cover" 
+                loading="lazy" 
+                decoding="async"
+                fetchpriority="low"
+             />
           </div>
         </div>
       </template>