feat(image): 메인 홈, 채팅 - 톡 페이지에 DownsampledKFImage 적용

- 수평 리스트 HStack → LazyHStack으로 교체해 프리로딩/메모리 개선

SodaLive/Sources/Content/Series/DayOfWeekSeriesView.swift

@@ -56,7 +56,7 @@ struct DayOfWeekSeriesView: View {
             .padding(.horizontal, 24)
             
             ScrollView(.horizontal, showsIndicators: false) {
-                HStack(spacing: 5) {
+                LazyHStack(spacing: 5) {
                     ForEach(0..<dayOfWeekItems.count, id: \.self) {
                         let item = dayOfWeekItems[$0]
                         DayOfWeekDayView(dayOfWeek: item.dayOfWeekStr, isSelected: dayOfWeek == item.dayOfWeek)
@@ -72,7 +72,7 @@ struct DayOfWeekSeriesView: View {
             }
             
             ScrollView(.horizontal, showsIndicators: false) {
-                HStack(spacing: 16) {
+                LazyHStack(spacing: 16) {
                     ForEach(0..<seriesList.count, id: \.self) {
                         SeriesItemView(item: seriesList[$0])
                     }

SodaLive/Sources/Content/Series/SeriesItemView.swift

@@ -17,13 +17,12 @@ struct SeriesItemView: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 4) {
             ZStack {
-                KFImage(URL(string: item.coverImage))
-                    .cancelOnDisappear(true)
-                    .resizable()
-                    .scaledToFill()
-                    .frame(width: 160, height: 227, alignment: .center)
-                    .cornerRadius(16)
-                    .clipped()
+                DownsampledKFImage(
+                    url: URL(string: item.coverImage),
+                    size: CGSize(width: 160, height: 227)
+                )
+                .cornerRadius(16)
+                .clipped()
                 
                 VStack(alignment: .leading, spacing: 0) {
                     HStack(spacing: 0) {