Simplify Settings Screen UI

[najuna-brian]

Description

The current Settings screen has a complex layout with multiple buttons and sections that can be streamlined. We want to redesign it to be cleaner and more intuitive

Goals:

• Simplify the UI with a cleaner header showing the ODE logo and brand
• Add inline QR code scanner button next to server URL field
• Auto-save settings to reduce button clutter
• Auto-fill saved credentials for better UX

[r0ssing]

This would be great to have before version 1.0. I also think we should consider if we need both the login and the save buttons or if we can auto-login on save or something?

[r0ssing]

I've used the needs-review, because I think this is an issue we should discuss together before starting implementation