Add button command, fix list selection

CHDataManagement/Views/Posts/PostListView.swift

@@ -48,15 +48,13 @@ struct PostListView: View {
     @EnvironmentObject
     private var content: Content
 
-    @Binding
-    private var selectedPost: Post?
+    @EnvironmentObject
+    private var selection: SelectedContent
 
     @State
     private var searchString = ""
 
-    init(selectedPost: Binding<Post?>) {
-        self._selectedPost = selectedPost
-    }
+    init() { }
 
     private var filteredPosts: [Post] {
         guard !searchString.isEmpty else {
@@ -74,13 +72,20 @@ struct PostListView: View {
             TextField("", text: $searchString, prompt: Text("Search"))
                 .textFieldStyle(.roundedBorder)
                 .padding(.horizontal, 8)
-            List(filteredAndSortedPosts, selection: $selectedPost) { post in
+            List(filteredAndSortedPosts) { post in
                 PostListItem(post: post)
-                    .tag(post)
+                    .listRowBackground(RoundedRectangle(cornerRadius: 5)
+                        .fill(selection.post == post ? Color.blue : Color.clear)
+                        .padding(.horizontal, 10)
+                    )
+                    .contentShape(Rectangle())
+                    .onTapGesture {
+                        selection.post = post
+                    }
             }
         }.onAppear {
-            if selectedPost == nil {
-                selectedPost = content.posts.first
+            if selection.post == nil, let first = content.posts.first {
+                selection.post = first
             }
         }
     }