feature(mobile): allow app to be used offline (#1932)

* feature(mobile): allow app to be used offline

* translatable server/network error message

* adjust profile drawer error message

* call getAllAsset after cold app starts

* fix analyzer error

* update asset state if length differs

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Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/modules/album/ui/album_thumbnail_listtile.dart

@@ -52,6 +52,8 @@ class AlbumThumbnailListTile extends StatelessWidget {
         ),
         httpHeaders: {"Authorization": "Bearer ${box.get(accessTokenKey)}"},
         cacheKey: getAlbumThumbNailCacheKey(album, type: ThumbnailFormat.JPEG),
+        errorWidget: (context, url, error) =>
+            const Icon(Icons.image_not_supported_outlined),
       );
     }