phsl / new-api

- Replace local isDarkMode state with global useTheme hook in TopUp component
- Replace local isDarkMode state with global useTheme hook in PersonalSetting component
- Remove redundant theme detection useEffect hooks that caused state inconsistency
- Update theme condition checks from isDarkMode to theme === 'dark'
- Fix issue where components showed dark gradients in light mode due to theme state mismatch
- Clean up trailing commas in import statements

This ensures all components stay synchronized with the global theme system managed by HeaderBar's theme toggle button.