Download asset to local and error fixing (#100)

* Update photo_manager pub package
* Added download endpoint for assets
* Successfully save a photo to the local device's gallery
* Save save a video to the local device's gallery
* Fixed #97
* Added download loading indicator
* Refactor and increase the font size for curated search thumbnail images
* Reposition loading animation on the search result page

mobile/lib/modules/home/ui/thumbnail_image.dart

@@ -65,8 +65,8 @@ class ThumbnailImage extends HookConsumerWidget {
           } else {
             AutoRouter.of(context).push(
               VideoViewerRoute(
-                videoUrl: '${box.get(serverEndpointKey)}/asset/file?aid=${asset.deviceAssetId}&did=${asset.deviceId}',
-              ),
+                  videoUrl: '${box.get(serverEndpointKey)}/asset/file?aid=${asset.deviceAssetId}&did=${asset.deviceId}',
+                  asset: asset),
             );
           }
         }