Refactor: 이용약관 화면 시작하기 버튼 활성화 조건 변경

- 로딩중일 경우 비활성화 되도록 수정

Author: wjdrjs00

presentation/src/main/java/com/threegap/bitnagil/presentation/terms/TermsAgreementScreen.kt

@@ -180,7 +180,7 @@ private fun TermsAgreementScreen(
 
         Button(
             onClick = onStartButtonClick,
-            enabled = uiState.isAllAgreed,
+            enabled = uiState.submitEnabled,
             modifier = Modifier
                 .fillMaxWidth()
                 .padding(

presentation/src/main/java/com/threegap/bitnagil/presentation/terms/model/TermsAgreementState.kt

@@ -12,4 +12,7 @@ data class TermsAgreementState(
 ) : MviState {
     val isAllAgreed: Boolean
         get() = agreedTermsOfService && agreedPrivacyPolicy && agreedOverFourteen
+
+    val submitEnabled: Boolean
+        get() = !isLoading && isAllAgreed
 }