feat: integrate lightbox for media images and improve media session handling

- Add lightbox support to song/playlist cover images by adding lb-trigger class and data-lightbox attributes
- Prevent default click behavior in lightbox.js to avoid navigation when opening image modal
- Update player UI to conditionally enable/disable lightbox on album art based on cover presence
- Set navigator.mediaSession.playbackState proactively during audio reassignment to prevent OS throttling
- Wrap media session seek handlers in try-catch blocks for compatibility with mobile streaming sources

public/js/lightbox.js

@@ -46,6 +46,8 @@
   document.addEventListener('click', (e) => {
     const trigger = e.target.closest('[data-lightbox]');
     if (trigger) {
+      e.preventDefault();
+      e.stopPropagation();
       open(trigger.src || trigger.dataset.src, trigger.alt);
       return;
     }

public/js/player.js

@@ -36,6 +36,8 @@
       titleEl.textContent = 'Nothing playing';
       artistEl.textContent = '';
       coverEl.src = '/static/vendor/cover-placeholder.svg';
+      coverEl.removeAttribute('data-lightbox');
+      coverEl.classList.remove('lb-trigger');
       queueInfoEl.textContent = '';
       updatePlayerSocial(null);
       return;
@@ -43,6 +45,13 @@
     titleEl.textContent = cur.title;
     artistEl.textContent = cur.artist || '';
     coverEl.src = cur.cover || '/static/vendor/cover-placeholder.svg';
+    if (cur.cover) {
+      coverEl.setAttribute('data-lightbox', '');
+      coverEl.classList.add('lb-trigger');
+    } else {
+      coverEl.removeAttribute('data-lightbox');
+      coverEl.classList.remove('lb-trigger');
+    }
     queueInfoEl.textContent = state.queue.length > 1
       ? `${state.index + 1} / ${state.queue.length}`
       : '';
@@ -73,6 +82,9 @@
         ? [{ src: new URL(cur.cover, window.location.origin).href, sizes: '512x512', type: 'image/jpeg' }]
         : [],
     });
+    // Proactively mark as playing so the OS doesn't throttle during the
+    // brief gap when audio.src is reassigned (which fires a pause event).
+    navigator.mediaSession.playbackState = 'playing';
   }
 
   function playCurrent() {
@@ -126,9 +138,10 @@
     navigator.mediaSession.setActionHandler('pause',         () => audio.pause());
     navigator.mediaSession.setActionHandler('nexttrack',     () => next());
     navigator.mediaSession.setActionHandler('previoustrack', () => prev());
-    navigator.mediaSession.setActionHandler('seekto',        (d) => { audio.currentTime = d.seekTime; });
-    navigator.mediaSession.setActionHandler('seekbackward',  (d) => { audio.currentTime = Math.max(0, audio.currentTime - (d.seekOffset || 10)); });
-    navigator.mediaSession.setActionHandler('seekforward',   (d) => { audio.currentTime = Math.min(audio.duration || Infinity, audio.currentTime + (d.seekOffset || 10)); });
+    // seek handlers may throw on some mobile browsers for streaming sources
+    try { navigator.mediaSession.setActionHandler('seekto',       (d) => { audio.currentTime = d.seekTime; }); } catch (_) {}
+    try { navigator.mediaSession.setActionHandler('seekbackward', (d) => { audio.currentTime = Math.max(0, audio.currentTime - (d.seekOffset || 10)); }); } catch (_) {}
+    try { navigator.mediaSession.setActionHandler('seekforward',  (d) => { audio.currentTime = Math.min(audio.duration || Infinity, audio.currentTime + (d.seekOffset || 10)); }); } catch (_) {}
   }
 
   repeatBtn.addEventListener('click', () => {

src/views/partials/song_list.ejs

@@ -11,7 +11,7 @@
         <input type="checkbox" class="song-select" value="<%= s.id %>" aria-label="Select <%= s.title %>">
       <% } %>
       <% if (s.coverPath) { %>
-        <img src="/media/<%= s.coverPath %>" alt="" class="song-cover" />
+        <img src="/media/<%= s.coverPath %>" alt="" class="song-cover lb-trigger" data-lightbox />
       <% } else { %>
         <div class="song-cover cover-fallback">♪</div>
       <% } %>

src/views/public/home.ejs

@@ -12,7 +12,7 @@
       <% featured.forEach((p) => { %>
         <a class="card" href="/playlists/<%= p.slug %>" data-playlist-id="<%= p.id %>">
           <% if (p.coverPath) { %>
-            <img src="/media/<%= p.coverPath %>" alt="" />
+            <img src="/media/<%= p.coverPath %>" alt="" class="lb-trigger" data-lightbox />
           <% } else { %>
             <div class="cover-fallback">🎧</div>
           <% } %>

src/views/public/songs.ejs

@@ -7,7 +7,7 @@
     <% recentlyLiked.forEach((s) => { %>
       <a href="/songs/<%= s.slug %>" class="liked-card">
         <% if (s.coverPath) { %>
-          <img src="/media/<%= s.coverPath %>" alt="" class="liked-card-cover">
+          <img src="/media/<%= s.coverPath %>" alt="" class="liked-card-cover lb-trigger" data-lightbox>
         <% } else { %>
           <div class="liked-card-cover liked-card-cover--fallback">♪</div>
         <% } %>
@@ -53,7 +53,7 @@
     <% mostPopular.forEach((s) => { %>
       <a href="/songs/<%= s.slug %>" class="liked-card">
         <% if (s.coverPath) { %>
-          <img src="/media/<%= s.coverPath %>" alt="" class="liked-card-cover">
+          <img src="/media/<%= s.coverPath %>" alt="" class="liked-card-cover lb-trigger" data-lightbox>
         <% } else { %>
           <div class="liked-card-cover liked-card-cover--fallback">♪</div>
         <% } %>