fix(content): 성인 콘텐츠 설정 동기화와 국가별 인증 분기를 적용한다

SodaLive/Sources/Settings/SettingsView.swift

@@ -16,6 +16,12 @@ struct SettingsView: View {
     
     var body: some View {
         let cardWidth = screenSize().width - 26.7
+        let isAuth = UserDefaults.bool(forKey: .auth)
+        let normalizedCountryCode = UserDefaults
+            .string(forKey: .countryCode)
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+            .uppercased()
+        let isNonKoreanCountry = !normalizedCountryCode.isEmpty && normalizedCountryCode != "KR"
         
         BaseView(isLoading: $viewModel.isLoading) {
             GeometryReader { geo in
@@ -65,7 +71,7 @@ struct SettingsView: View {
                                     AppState.shared.setAppStep(step: .languageSettings)
                                 }
                                 
-                                if UserDefaults.bool(forKey: .auth) {
+                                if isAuth || isNonKoreanCountry {
                                     Rectangle()
                                         .frame(width: cardWidth - 26.7, height: 0.3)
                                         .foregroundColor(Color.gray90)