* Refactors to use widgets in immich asset grid
Adds comments
* Fixes asset thumbnail absoluteOffset
* feat(mobile): Uses gradient image placeholders in memory lane and in the asset grid (#7142)
* Uses gradient image placeholders in memory lane and in the asset grid
* Changes to create placeholders in immmich image.thumbnail
* removed unused import
* uses context.isDarkTheme and fixed function signature for allAssetsSelected
