lazy load model detail images

src/routes/ModelDetails.svelte

@@ -102,7 +102,7 @@
         <div class="grid">
             {#each scenes as scene}
                 <button class="grid-item" on:click={() => onSceneClick(scene)}>
-                    <img src={scene.thumbnail} alt={scene.name} class="thumbnail" />
+                    <img loading="lazy" src={scene.thumbnail} alt={scene.name} class="thumbnail" />
                     <div class="title">{scene.name.length > 16 ? `${scene.name.slice(0, 16)}...` : scene.name}</div>
                 </button>
             {/each}