Match iOS UI design in Android app

Implement the same UI design as iOS for consistency across platforms.

Design Parity:

• Match color schemes and typography
• Implement same component library in Jetpack Compose
• Consistent spacing and layouts
• Material Design 3 theming
• Dark theme support

Platform Differences:

• Respect Android navigation patterns
• Use Material Design components where appropriate
• Android-specific features (widgets, quick settings)

Implementation:

• Create Compose component library
• Implement Material 3 theme
• Add dark mode
• Create component previews
• Test on multiple screen sizes
• Accessibility testing (TalkBack)

Related: iOS app issue #1 (coordinate designs)