fix(mobile): blurry memory photos (#6734)

* fix(mobile): blurry memory photos

* better naming and performance

mobile/lib/modules/memories/ui/memory_card.dart

@@ -82,6 +82,7 @@ class MemoryCard extends HookConsumerWidget {
               height: double.infinity,
               width: double.infinity,
               type: ThumbnailFormat.JPEG,
+              preferredLocalAssetSize: 2048,
             ),
           ),
           Positioned(

mobile/lib/modules/memories/views/memory_page.dart

@@ -101,6 +101,7 @@ class MemoryPage extends HookConsumerWidget {
           asset,
           context,
           type: api.ThumbnailFormat.WEBP,
+          size: 2048,
         ),
       );
       precaches.add(
@@ -108,6 +109,7 @@ class MemoryPage extends HookConsumerWidget {
           asset,
           context,
           type: api.ThumbnailFormat.JPEG,
+          size: 2048,
         ),
       );