[Feature] OLED Darkmode for Immich client application

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

Hello, if you install Immich client app in the Google Play Store or iOS App Store it has a grey dark mode background, but I would like to have a full OLED black background, so pixels which are not needed are actually fully off to save battery.

For those who don't know what I mean by "OLED dark mode":
Normal dark mode: Grey background, pixels behind the display are ON to show grey color = needs battery
OLED dark mode: Black background, pixels behind the display are OFF = doesn't use any battery

Platform

• Server
• Web
• Mobile