phsl / new-api

This commit standardizes the card header design across multiple edit pages
to create a consistent and modern UI experience.

Changes made:
- Add gradient background colors to card headers
- Implement decorative circular elements for visual appeal
- Update icon colors to white with semi-transparent backgrounds
- Standardize text colors and opacity for better readability
- Add consistent padding and border radius
- Maintain unique color schemes for different functional sections

Modified files:
- EditChannel.js
- EditRedemption.js
- EditToken.js
- EditUser.js
- AddUser.js

The new design features:
- Blue gradient for basic information sections
- Green gradient for quota/permission settings
- Purple gradient for access restrictions
- Orange gradient for binding/group information
- Consistent layout structure across all edit pages

This update improves visual hierarchy and maintains brand consistency
while enhancing the overall user experience.