🎨 feat(ui): enhance pricing components with improved icons and responsive design

- Replace copy button icon from semi-ui IconCopy to lucide-react Copy in PricingCardView
- Add conditional tooltip functionality to SelectableButtonGroup that only shows when text overflows
- Implement responsive table column behavior in PricingTableColumns with mobile-aware fixed positioning
- Use DOM-based overflow detection (scrollWidth vs clientWidth) for better performance
- Apply useIsMobile hook to conditionally set fixed: 'right' only on desktop devices

These changes improve user experience across different screen sizes and provide more consistent iconography throughout the pricing interface.

web/src/components/common/ui/ScrollableContainer.jsx

@@ -38,7 +38,7 @@ const ScrollableContainer = forwardRef(({
   children,
   maxHeight = '24rem',
   className = '',
-  contentClassName = 'p-2',
+  contentClassName = '',
   fadeIndicatorClassName = '',
   checkInterval = 100,
   scrollThreshold = 5,