💄 style(layout): add horizontal padding to top-offset divs for consistent spacing

Replaced every instance of
<div className="mt-[64px]">
with
<div className="mt-[64px] px-2">
to provide uniform horizontal padding across pages. No functional changes—visual layout improvement only.

web/src/pages/Chat2Link/index.js

@@ -17,7 +17,7 @@ const chat2page = () => {
   }
 
   return (
-    <div className="mt-[64px]">
+    <div className="mt-[64px] px-2">
       <h3>正在加载，请稍候...</h3>
     </div>
   );