Add a modifier that wraps the thread list so that the list can be customized based on state changes

Author: nuno-vieira

Sources/StreamChatSwiftUI/ChatThreadList/ChatThreadListView.swift

@@ -82,6 +82,7 @@ public struct ChatThreadListView<Factory: ViewFactory>: View {
                 viewFactory.makeThreadListBackground(colors: colors)
             )
             .modifier(viewFactory.makeThreadListHeaderViewModifier(title: title))
+            .modifier(viewFactory.makeThreadListContainerViewModifier(viewModel: viewModel))
             .onAppear {
                 viewModel.viewDidAppear()
             }

Sources/StreamChatSwiftUI/DefaultViewFactory.swift

@@ -1005,6 +1005,10 @@ extension ViewFactory {
         ChatThreadListLoadingView()
     }
 
+    public func makeThreadListContainerViewModifier(viewModel: ChatThreadListViewModel) -> some ViewModifier {
+        EmptyViewModifier()
+    }
+
     public func makeThreadListHeaderViewModifier(title: String) -> some ViewModifier {
         ChatThreadListHeaderViewModifier(title: title)
     }

Sources/StreamChatSwiftUI/ViewFactory.swift

@@ -1018,6 +1018,11 @@ public protocol ViewFactory: AnyObject {
     /// Creates a loading view for the thread list.
     func makeThreadListLoadingView() -> ThreadListLoadingView
 
+    associatedtype ThreadListContainerModifier: ViewModifier
+    /// Creates a modifier that wraps the thread list. It can be used to handle additional state changes.
+    /// - Parameter viewModel: The view model that manages the state of the thread list.
+    func makeThreadListContainerViewModifier(viewModel: ChatThreadListViewModel) -> ThreadListContainerModifier
+
     associatedtype ThreadListHeaderViewModifier: ViewModifier
     /// Creates the thread list navigation header view modifier.
     ///  - Parameter title: the title displayed in the header.