✨ 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/pages/Setup/index.js

@@ -133,7 +133,7 @@ const Setup = () => {
   };
 
   return (
-    <div className="bg-gray-50">
+    <div className="bg-gray-50 mt-[64px]">
       <Layout>
         <Layout.Content>
           <div className="flex justify-center px-4 py-8">