perf: enable lazy loading of images (?)

webui/src/components/display/BlobPreview.svelte

@@ -93,6 +93,7 @@
         <img
           src="{API_URL}/thumb/{address}?mime=audio"
           alt="Thumbnail for {address}..."
+          loading="lazy"
           on:load={() => (imageLoaded = address)}
           on:error={() => (handled = false)}
         />
@@ -116,6 +117,7 @@
             ? 'raw'
             : 'thumb'}/{address}?size=512&quality=75"
           alt="Thumbnail for {address}..."
+          loading="lazy"
           on:load={() => (imageLoaded = address)}
           on:error={() => (handled = false)}
         />

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

@@ -73,6 +73,7 @@
         class="thumb"
         src="{API_URL}/thumb/{address}?mime=video"
         alt="Preview for {address}"
+        loading="lazy"
         on:load={() => (state = State.PREVIEW)}
         on:mouseover={() => (state = State.PREVIEWING)}
         on:error={() => (state = State.ERRORED)}