Removed outdated compatibility aliases and deprecated methods from AppColorScheme,
and updated CLAUDE.md to reflect new theme system requirements with centralized
color management and no hard-coded values in UI components.
Updated the app's color scheme to implement a new "Slate" theme with refined dark and light variants. Changed background colors from #0A0E14 to #0B1120 for dark mode and updated surface layer colors to follow Material Design 3 specifications. Modified text colors and outline variants for better contrast and accessibility. Updated font sizes in transaction details screen from 11px to 12px for improved readability.
