Live-update queue list when upload status changes

Storage.updatePhoto() now fires a 'photo-updated' CustomEvent so the
queue page refreshes immediately (300ms debounce) when the sync engine
changes a photo's status, instead of waiting for the 5s poll.

Also reduces background poll to 30s (just a fallback now), and revokes
stale ObjectURLs on each rebuild to prevent memory leaks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/static/js/storage.js

@@ -93,7 +93,14 @@ const Storage = {
     },
     
     async updatePhoto(id, updates) {
-        return await this.db.photos.update(id, updates);
+        const result = await this.db.photos.update(id, updates);
+        // Notify any listening UI (e.g. queue page) of the change
+        try {
+            window.dispatchEvent(new CustomEvent('photo-updated', {
+                detail: { id: id, updates: updates }
+            }));
+        } catch (e) { /* ignore if no window context */ }
+        return result;
     },
     
     async deletePhoto(id) {

app/static/sw.js

@@ -1,9 +1,9 @@
 // NextSnap Service Worker
 // Provides offline-first caching for the app shell
 
-const CACHE_VERSION = 'nextsnap-v15';
+const CACHE_VERSION = 'nextsnap-v16';
-const APP_SHELL_CACHE = 'nextsnap-shell-v11';
+const APP_SHELL_CACHE = 'nextsnap-shell-v12';
-const RUNTIME_CACHE = 'nextsnap-runtime-v11';
+const RUNTIME_CACHE = 'nextsnap-runtime-v12';
 
 // Assets to cache on install
 const APP_SHELL_ASSETS = [

app/templates/queue.html

@@ -411,6 +411,10 @@ async function loadQueue() {
     }
 
     emptyState.style.display = 'none';
+    // Revoke old ObjectURLs before rebuilding to prevent memory leaks
+    queueList.querySelectorAll('img[src^="blob:"]').forEach(img => {
+        URL.revokeObjectURL(img.src);
+    });
     queueList.innerHTML = '';
 
     // Show active uploads first (newest first)
@@ -610,10 +614,23 @@ window.addEventListener('offline', () => {
     document.getElementById('sync-now-btn').disabled = true;
 });
 
-// Refresh queue periodically
+// Live updates: listen for photo status changes from the sync engine
+let refreshTimer = null;
+window.addEventListener('photo-updated', () => {
+    // Debounce: rapid status transitions (pending→uploading→verified)
+    // would otherwise trigger multiple full rebuilds
+    if (refreshTimer) clearTimeout(refreshTimer);
+    refreshTimer = setTimeout(() => {
+        refreshTimer = null;
+        loadQueue();
+        updateStats();
+    }, 300);
+});
+
+// Fallback: full refresh every 30s in case events are missed
 setInterval(() => {
     loadQueue();
     updateStats();
-}, 5000);
+}, 30000);
 </script>
 {% endblock %}