🎨 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/hooks/model-pricing/useModelPricingData.jsx

@@ -39,7 +39,7 @@ export const useModelPricingData = () => {
   const [filterEndpointType, setFilterEndpointType] = useState('all'); // 端点类型筛选: 'all' | string
   const [filterVendor, setFilterVendor] = useState('all'); // 供应商筛选: 'all' | 'unknown' | string
   const [filterTag, setFilterTag] = useState('all'); // 模型标签筛选: 'all' | string
-  const [pageSize, setPageSize] = useState(100);
+  const [pageSize, setPageSize] = useState(20);
   const [currentPage, setCurrentPage] = useState(1);
   const [currency, setCurrency] = useState('USD');
   const [showWithRecharge, setShowWithRecharge] = useState(false);