fix: 연차 설정 화면 ScrollView 추가

- 작은 화면에서 저장 버튼이 잘리지 않도록 ScrollView로 감싸기
- 저장 버튼 가시성 확보

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

app/src/main/res/layout/fragment_settings_lab.xml

@@ -1,8 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:fillViewport="true">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
         android:orientation="vertical"
         android:padding="24dp"
         android:gravity="center_horizontal">
@@ -126,3 +131,5 @@
             android:backgroundTint="@color/primary"/>
 
     </LinearLayout>
+
+</ScrollView>