Refactor activity image error handling and clean up debug_bestbuy

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

dashboard/static/app.js

@@ -281,7 +281,7 @@ async function loadActivityFeed() {
     return `
       <div class="activity-item">
         ${hasProductImage
-          ? `<img src="${event.image_url}" class="activity-thumb" alt="" onerror="this.outerHTML=\`${storeLogoHtml.replace(/`/g, '\\`').replace(/\n/g, '')}\`">`
+          ? `<img src="${event.image_url}" class="activity-thumb" alt="" onerror="handleActivityImageError(this, '${event.site}')">`
           : storeLogoHtml
         }
         <div class="activity-details">
@@ -297,6 +297,19 @@ async function loadActivityFeed() {
   }).join('');
 }
 
+function handleActivityImageError(img, site) {
+  const storeInfo = STORE_INFO[site] || { name: site, color: '#333', bgColor: '#666', logo: '', fallback: '?' };
+  const div = document.createElement('div');
+  div.className = 'activity-store-icon';
+  div.style.background = storeInfo.bgColor;
+  div.innerHTML = `
+    <img src="${storeInfo.logo}" alt="${storeInfo.name}" class="activity-store-logo"
+         onerror="this.style.display='none'; this.nextElementSibling.style.display='block';">
+    <span class="activity-store-fallback" style="display:none; color:${storeInfo.color};">${storeInfo.fallback}</span>
+  `;
+  img.replaceWith(div);
+}
+
 // Navigate to products filtered by event type
 function goToFilteredProducts(eventType, period) {
   currentEventFilter = { type: eventType, period: period };
@@ -718,7 +731,7 @@ function cleanProductName(name) {
     .replace(/\{[^}]*\}/g, '')  // Remove any remaining {css} blocks
     .replace(/\d+\s*Reviews?$/i, '')  // Remove trailing "X Reviews"
     // Fix Pokémon - multiple encoding patterns
-    .replace(/Pok[éÃ\u00c3\u00a9]+mon/gi, 'Pokémon')
+    .replace(/Pok[éÃ\u00c3\u00a9\ufffd]+mon/gi, 'Pokémon')
     .replace(/Pokémon/gi, 'Pokémon')
     .replace(/Pok&eacute;mon/gi, 'Pokémon')
     .replace(/Pokﾃｩmon/gi, 'Pokémon')