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

- 수평 리스트 HStack → LazyHStack으로 교체해 프리로딩/메모리 개선

SodaLive/Sources/Chat/Original/OriginalTabItemView.swift

@@ -15,15 +15,10 @@ struct OriginalTabItemView: View {
     
     var body: some View {
         VStack(alignment: .leading, spacing: 4) {
-            KFImage(URL(string: item.imageUrl!))
-                .placeholder { Color.gray.opacity(0.2) }
-                .retry(maxCount: 2, interval: .seconds(1))
-                .cancelOnDisappear(true)
-                .resizable()
-                .scaledToFill()
-                .frame(width: size, height: size * 432 / 306)
-                .clipped()
-                .cornerRadius(16)
+            DownsampledKFImage(
+                url: URL(string: item.imageUrl!),
+                size: CGSize(width: size, height: size * 432 / 306)
+            ).cornerRadius(16)
             
             Text(item.title)
                 .font(.custom(Font.preRegular.rawValue, size: 18))