refactor(frontend): move form-item hints from extra to tooltip

Switch reality target, node options, and WARP auto-update-IP hints from
inline extra text to label tooltips for a cleaner form layout.

frontend/src/pages/inbounds/form/security/reality.tsx

@@ -47,7 +47,7 @@ export default function RealityForm({
       </Form.Item>
       <Form.Item
         label={t('pages.inbounds.form.target')}
-        extra={t('pages.inbounds.form.realityTargetHint')}
+        tooltip={t('pages.inbounds.form.realityTargetHint')}
       >
         <Space.Compact block>
           <Form.Item