Improve management of cache key

lib/utils/ui_utils.dart

@@ -74,9 +74,13 @@ Widget buildErrorCard(String? message,
 }
 
 /// Show an image with a given [url] in full screen
-void showImageFullScreen(BuildContext context, String? url) {
+void showImageFullScreen(BuildContext context, String? url,
+    {String? cacheKey}) {
   Navigator.of(context).push(MaterialPageRoute(builder: (c) {
-    return FullScreenImageRoute(url!);
+    return FullScreenImageRoute(
+      url: url!,
+      cacheKey: cacheKey,
+    );
   }));
 }