fix: place signup email hint under email field

heicode/web/default/src/features/auth/sign-up/components/sign-up-form.tsx

@@ -259,11 +259,6 @@ export function SignUpForm({
                     />
                   </div>
                 </FormControl>
-                <p className='text-muted-foreground mt-1.5 text-xs leading-relaxed'>
-                  {t(
-                    'We recommend using a mainland China email address so verification emails arrive more reliably.'
-                  )}
-                </p>
                 <FormMessage />
               </FormItem>
             )}
@@ -288,6 +283,11 @@ export function SignUpForm({
                     />
                   </div>
                 </FormControl>
+                <p className='text-muted-foreground mt-1.5 text-xs leading-relaxed'>
+                  {t(
+                    'We recommend using a mainland China email address so verification emails arrive more reliably.'
+                  )}
+                </p>
                 <FormMessage />
               </FormItem>
             )}