UI revamp

[zaiatsartem]

Purpose

Revamped UI across the entire app with improved visuals and usability

Changes

• Redesigned Main Screen with better navigation.
• A separate Accounts List Screen for easier account management.
• A new Activity Screen with Transfers list

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.

[Radiokot]

You have changed the wallet DB schema of the version 10, is this change backward compatible? Can you install the app over the current main and have no DB error?