feat(i18n): 마이페이지 그룹 3~5 하드코딩 문구를 I18n 키로 통일한다

SodaLive/Sources/MyPage/ReservationStatus/LiveReservationStatusView.swift

@@ -14,7 +14,7 @@ struct LiveReservationStatusView: View {
     var body: some View {
         BaseView(isLoading: $viewModel.isLoading) {
             VStack(spacing: 0) {
-                DetailNavigationBar(title: "라이브 예약 현황")
+                DetailNavigationBar(title: I18n.MyPage.Reservation.LiveStatus.title)
                 
                 if viewModel.reservationStatusItems.count > 0 {
                     ScrollView(.vertical, showsIndicators: false) {
@@ -26,7 +26,7 @@ struct LiveReservationStatusView: View {
                         .padding(.vertical, 13.3)
                     }
                 } else {
-                    Text("예약한 라이브가 없습니다.")
+                    Text(I18n.MyPage.Reservation.LiveStatus.emptyMessage)
                         .appFont(size: 15, weight: .medium)
                         .foregroundColor(Color(hex: "bbbbbb"))
                         .frame(maxHeight: .infinity)