Add album art placeholder

templates/browser.html

@@ -58,7 +58,11 @@
   >
     <span class="material-symbols-outlined" title="Song">music_note</span>
     <div class="albumart">
-      <img src="/art?path={{ path|urlencode }}" onerror="this.style.visibility = 'hidden'">
+      <img
+        src="/art?path={{ path|urlencode }}"
+        onload="this.style.visibility = 'visible'"
+        alt="Album art"
+      >
     </div>
     <div class="song">
       <div class="song__name">{{ name }}</div>

templates/player.html

@@ -5,11 +5,10 @@
   {% if let Some(song) = song %}
   <div class="albumart">
     <a href="/art?path={{ song.file|urlencode }}" target="_blank">
-      <img 
+      <img
         src="/art?path={{ song.file|urlencode }}"
-        onerror="this.style.opacity = 0"
+        onload="this.style.visibility = 'visible'"
         alt="Album art"
-        title="Album art"
       >
     </a>
   </div>

templates/queue.html

@@ -7,9 +7,8 @@
     <div class="albumart">
       <img
         src="/art?path={{ item.file|urlencode }}"
-        onerror="this.style.opacity = 0"
+        onload="this.style.visibility = 'visible'"
         alt="Album art"
-        title="Album art"
       >
     </div>
     <div class="metadata">