🎨 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/layout/HeaderBar/LanguageSelector.jsx

@@ -25,21 +25,21 @@ import { CN, GB } from 'country-flag-icons/react/3x2';
 const LanguageSelector = ({ currentLang, onLanguageChange, t }) => {
   return (
     <Dropdown
-      position="bottomRight"
+      position='bottomRight'
       render={
-        <Dropdown.Menu className="!bg-semi-color-bg-overlay !border-semi-color-border !shadow-lg !rounded-lg dark:!bg-gray-700 dark:!border-gray-600">
+        <Dropdown.Menu className='!bg-semi-color-bg-overlay !border-semi-color-border !shadow-lg !rounded-lg dark:!bg-gray-700 dark:!border-gray-600'>
           <Dropdown.Item
             onClick={() => onLanguageChange('zh')}
             className={`!flex !items-center !gap-2 !px-3 !py-1.5 !text-sm !text-semi-color-text-0 dark:!text-gray-200 ${currentLang === 'zh' ? '!bg-semi-color-primary-light-default dark:!bg-blue-600 !font-semibold' : 'hover:!bg-semi-color-fill-1 dark:hover:!bg-gray-600'}`}
           >
-            <CN title="中文" className="!w-5 !h-auto" />
+            <CN title='中文' className='!w-5 !h-auto' />
             <span>中文</span>
           </Dropdown.Item>
           <Dropdown.Item
             onClick={() => onLanguageChange('en')}
             className={`!flex !items-center !gap-2 !px-3 !py-1.5 !text-sm !text-semi-color-text-0 dark:!text-gray-200 ${currentLang === 'en' ? '!bg-semi-color-primary-light-default dark:!bg-blue-600 !font-semibold' : 'hover:!bg-semi-color-fill-1 dark:hover:!bg-gray-600'}`}
           >
-            <GB title="English" className="!w-5 !h-auto" />
+            <GB title='English' className='!w-5 !h-auto' />
             <span>English</span>
           </Dropdown.Item>
         </Dropdown.Menu>
@@ -48,9 +48,9 @@ const LanguageSelector = ({ currentLang, onLanguageChange, t }) => {
       <Button
         icon={<Languages size={18} />}
         aria-label={t('切换语言')}
-        theme="borderless"
-        type="tertiary"
-        className="!p-1.5 !text-current focus:!bg-semi-color-fill-1 dark:focus:!bg-gray-700 !rounded-full !bg-semi-color-fill-0 dark:!bg-semi-color-fill-1 hover:!bg-semi-color-fill-1 dark:hover:!bg-semi-color-fill-2"
+        theme='borderless'
+        type='tertiary'
+        className='!p-1.5 !text-current focus:!bg-semi-color-fill-1 dark:focus:!bg-gray-700 !rounded-full !bg-semi-color-fill-0 dark:!bg-semi-color-fill-1 hover:!bg-semi-color-fill-1 dark:hover:!bg-semi-color-fill-2'
       />
     </Dropdown>
   );