🎨 feat(model-pricing): refactor layout and component structure (#1365)

* Re-architected model-pricing page into modular components:
  * PricingPage / PricingSidebar / PricingContent
  * Removed obsolete `ModelPricing*` components and column defs
* Introduced reusable `SelectableButtonGroup` in `common/ui`
  * Supports Row/Col grid (3 per row)
  * Optional collapsible mode with gradient mask & toggle
* Rebuilt filter panels with the new button-group:
  * Model categories, token groups, and quota types
  * Added dynamic `tagCount` badges to display item totals
* Extended `useModelPricingData` hook
  * Added `filterGroup` and `filterQuotaType` state and logic
* Updated PricingTable columns & sidebar reset logic to respect new states
* Ensured backward compatibility via re-export in `index.jsx`
* Polished styling, icons and i18n keys

web/src/components/layout/HeaderBar.js

@@ -467,7 +467,7 @@ const HeaderBar = ({ onMobileMenuToggle, drawerOpen }) => {
   };
 
   return (
-    <header className="text-semi-color-text-0 sticky top-0 z-50 transition-colors duration-300 bg-white/75 dark:bg-zinc-900/75 backdrop-blur-lg">
+    <header className="text-semi-color-text-0 sticky top-0 z-50 transition-colors duration-300 bg-white/75 dark:bg-zinc-900/75 backdrop-blur-lg" style={{ borderBottom: '1px solid var(--semi-color-border)' }}>
       <NoticeModal
         visible={noticeVisible}
         onClose={handleNoticeClose}

web/src/components/layout/PageLayout.js

@@ -42,7 +42,7 @@ const PageLayout = () => {
   const { i18n } = useTranslation();
   const location = useLocation();
 
-  const shouldHideFooter = location.pathname.startsWith('/console');
+  const shouldHideFooter = location.pathname.startsWith('/console') || location.pathname === '/pricing';
 
   const shouldInnerPadding = location.pathname.includes('/console') &&
     !location.pathname.startsWith('/console/chat') &&