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

- 수평 리스트 HStack → LazyHStack으로 교체해 프리로딩/메모리 개선

SodaLive/Sources/Home/HomeWeeklyChartItemView.swift

@@ -21,11 +21,11 @@ struct HomeWeeklyChartItemView: View {
                 .foregroundColor(Color(hex: "B5E7FA"))
                 .frame(width: 30)
             
-            KFImage(URL(string: content.coverImageUrl))
-                .cancelOnDisappear(true)
-                .resizable()
-                .frame(width: 60, height: 60)
-                .cornerRadius(12)
+            DownsampledKFImage(
+                url: URL(string: content.coverImageUrl),
+                size: CGSize(width: 60, height: 60)
+            )
+            .cornerRadius(12)
             
             VStack(alignment: .leading, spacing: 6) {
                 Text(content.title)