fix(sidebar): add mobile sidebar

src/widgets/mobile-callback/ui.tsx

@@ -0,0 +1,19 @@
+import s from './styles.module.scss';
+import { Icons } from '@shared/ui';
+
+function MobileCallback() {
+  return (
+    <div className={s.Root}>
+      <button className={s.Button}>
+        <Icons.MobileContact className={s.Icon} />
+        <span className={s.Text}>Записаться</span>
+      </button>
+      <button className={s.Button}>
+        <Icons.MobilePhone className={s.Icon} />
+        <span className={s.Text}>+7 (900) 241-34-34</span>
+      </button>
+    </div>
+  );
+}
+
+export { MobileCallback };