feat(gallery): always-visible feedback indicators on grid tiles; fallback image rendering in lightbox/hero; auto-auth from shared-link token; fix external photo resolver\n\n- GridGallery: bottom-left icons for like/rated/comment on every tile\n- Hero layout grid: added same indicators (non-intrusive icons)\n- Lightbox/Hero: add fallbackSrc to display thumbnail if original fails\n- GalleryAuth: auto-store token from /gallery/:slug/:token and hydrate event\n- Backend gallery photo route: use resolvePhotoFilePath for external-media\n\nfix(admin): move photo feedback badges to bottom-right on admin grid tiles\n\nfix(dashboard): add missing i18n keys for activity types + fallback to formatter\n\nfix(admin/feedback): correct thumbnail URL base + robust date parsing\n\nRefs: #19

frontend/src/pages/admin/AdminDashboard.tsx

@@ -268,13 +268,13 @@ export const AdminDashboard: React.FC = () => {
                     categoryName: activity.metadata?.category_name || ''
                   };
                   
-                  // Check if translation exists
-                  const translated = t(translationKey, params);
-                  if (typeof translated === 'string') {
-                    return translated;
+                  // Translate; if key missing i18n returns the key string itself
+                  const translated = t(translationKey, params) as string;
+                  if (!translated || translated === translationKey) {
+                    // Fallback: format a readable English message
+                    return adminService.formatActivityMessage(activity);
                   }
-                  // Fallback to unknown activity if translation not found
-                  return t('admin.activities.unknown') as string;
+                  return translated;
                 };
 
                 return (
@@ -302,4 +302,4 @@ export const AdminDashboard: React.FC = () => {
   );
 };
 
-AdminDashboard.displayName = 'AdminDashboard';
+AdminDashboard.displayName = 'AdminDashboard';

frontend/src/pages/admin/EventFeedbackPage.tsx

@@ -17,7 +17,7 @@ import {
   Trash2
 } from 'lucide-react';
 import { toast } from 'react-toastify';
-import { format } from 'date-fns';
+import { format, parseISO } from 'date-fns';
 
 import { Button, Card, Loading } from '../../components/common';
 import { AdminAuthenticatedImage } from '../../components/admin/AdminAuthenticatedImage';
@@ -254,7 +254,7 @@ export const EventFeedbackPage: React.FC = () => {
                     {item.photo_id && (
                       <div className="w-16 h-16 overflow-hidden rounded">
                         <AdminAuthenticatedImage
-                          src={`/api/admin/photos/${id}/thumbnail/${item.photo_id}`}
+                          src={`/admin/photos/${id}/thumbnail/${item.photo_id}`}
                           alt={item.filename || 'Photo'}
                           className="w-16 h-16 object-cover rounded"
                         />
@@ -290,7 +290,12 @@ export const EventFeedbackPage: React.FC = () => {
                             <p className="text-sm text-neutral-700">{item.comment_text}</p>
                           )}
                           <p className="text-xs text-neutral-500 mt-1">
-                            {format(new Date(item.created_at), 'PPpp')}
+                            {(() => {
+                              const d = typeof item.created_at === 'string' 
+                                ? parseISO(item.created_at) 
+                                : new Date(item.created_at);
+                              return isNaN(d.getTime()) ? t('common.unknownDate', 'Unknown date') : format(d, 'PPpp');
+                            })()}
                           </p>
                         </div>
                         <div className="flex items-center gap-2">
@@ -492,7 +497,12 @@ export const EventFeedbackPage: React.FC = () => {
                           <p className="text-sm text-neutral-700">{comment.comment_text}</p>
                           <p className="text-xs text-neutral-500 mt-1">
                             {comment.guest_name} • {comment.filename} • 
-                            {format(new Date(comment.created_at), 'PP')}
+                            {(() => {
+                              const d = typeof comment.created_at === 'string' 
+                                ? parseISO(comment.created_at) 
+                                : new Date(comment.created_at);
+                              return isNaN(d.getTime()) ? t('common.unknownDate', 'Unknown date') : format(d, 'PP');
+                            })()}
                           </p>
                         </div>
                       ))}