✨ feat(homepage): enhance banner visuals & UX

• Added read-only Base URL input that shows `status.server_address` (fallback `window.location.origin`) and copies value on click.
• Embedded `ScrollList` as input `suffix`; auto-cycles common endpoints every 3 s and allows manual selection.
• Introduced `API_ENDPOINTS` array in `web/src/constants/common.constant.js` for centralized endpoint management.
• Implemented custom CSS to hide ScrollList wheel indicators / scrollbars for a cleaner look.
• Created two blurred colour spheres behind the banner (`blur-ball-indigo`, `blur-ball-teal`) with light-/dark-mode opacity tweaks and lower vertical placement.
• Increased letter-spacing for Chinese heading via conditional `tracking-wide` / `md:tracking-wider` classes to improve readability.
• Misc: updated imports, helper functions, and responsive sizes to keep UI consistent across devices.

web/src/components/table/ModelPricing.js

@@ -523,10 +523,10 @@ const ModelPricing = () => {
     <div className="bg-gray-50">
       <Layout>
         <Layout.Content>
-          <div className="flex justify-center p-4 sm:p-6 md:p-8">
+          <div className="flex justify-center">
             <div className="w-full">
               {/* 主卡片容器 */}
-              <Card className="!rounded-2xl shadow-lg border-0">
+              <Card bordered={false} className="!rounded-2xl shadow-lg border-0">
                 {/* 顶部状态卡片 */}
                 <Card
                   className="!rounded-2xl !border-0 !shadow-md overflow-hidden mb-6"