🎨 chore(web): apply ESLint and Prettier auto-fixes (baseline)

- Ran: bun run eslint:fix && bun run lint:fix
- Inserted AGPL license header via eslint-plugin-header
- Enforced no-multiple-empty-lines and other lint rules
- Formatted code using Prettier v3 (@so1ve/prettier-config)
- No functional changes; formatting-only baseline across JS/JSX files

web/src/components/common/ui/Loading.jsx

@@ -21,13 +21,9 @@ import React from 'react';
 import { Spin } from '@douyinfe/semi-ui';
 
 const Loading = ({ size = 'small' }) => {
-
   return (
-    <div className="fixed inset-0 w-screen h-screen flex items-center justify-center">
-      <Spin
-        size={size}
-        spinning={true}
-      />
+    <div className='fixed inset-0 w-screen h-screen flex items-center justify-center'>
+      <Spin size={size} spinning={true} />
     </div>
   );
 };