Add safe-area insets for notched devices

[arisu6804]

Summary

Add safe-area insets for notched devices.

Context

Tracking issue for the YieldVault frontend. Open to contributors.

Acceptance criteria

• Implement the change described above
• Add or update automated tests
• Update the relevant documentation

[arisu6804]

Yours, @Whiznificent 📱 Safe-area insets matter a lot on notched devices — thanks for taking it. Say hi here: https://t.me/+8DgYV9HrNaA1Yjg1