aria-label is now read instead of placeholders, cuz lengthy ones like uuid are a sensory overload and could confuse people. instead, now we make a fake ui placeholder (because there's no other way to have exclusively aria-label while also showing placeholder normally)
also:
- renamed processing tab in settings to "instances"
- improved override description
- prefer custom over override (and grey out the option)
- dedicated lib for all api safety warnings
- left aligned small popup with smaller icon
- ability to grey out settings category & toggle
