fix: MainView의 초기 관찰 시작 시점을 onAppear로 되돌림

Author: opficdev

Application/DevLogPresentation/Sources/Main/MainView.swift

@@ -38,8 +38,10 @@ struct MainView: View {
                 }
             }
         }
-        .onChange(of: selectedTab) { oldValue, newValue in
+        .onAppear {
             coordinator.mainViewModel.send(.onAppear)
+        }
+        .onChange(of: selectedTab) { oldValue, newValue in
             if oldValue == nil && newValue == .home {
                 homeViewCoordinator.loadInitialData()
             }