Store UI settings server-side

Such as:

1. Theme (i.e. I use light theme)

2. Filtering options in Images / Posts sections (i.e. the “everyone/followed” filter)

My browser is configured to use Private Browsing by default and all cookies/settings are discarded every time I finish my session. This makes it sounds more like my personal issue but I still believe storing some UI settings on server side could make everyone’s UX more consistent and better.