Fix tag assignment in post UI

CHDataManagement/Main/MainContentView.swift

@@ -2,7 +2,7 @@ import SwiftUI
 
 protocol MainContentView: View {
 
-    associatedtype Item
+    associatedtype Item: Identifiable
 
     init(item: Item)
 

CHDataManagement/Main/SelectedContentView.swift

@@ -12,6 +12,7 @@ struct SelectedContentView<Contained>: View where Contained: MainContentView {
     var body: some View {
         if let item = selected {
             Contained(item: item)
+                .id(item.id)
         } else {
             HStack {
                 Spacer()

CHDataManagement/Main/SelectedDetailView.swift

@@ -12,7 +12,7 @@ struct SelectedDetailView<Contained>: View where Contained: MainContentView {
     var body: some View {
         if let item = selected {
             Contained(item: item)
-                //.id(item.id)
+                .id(item.id)
         } else {
             EmptyView()
         }