Multi Client Support - Needs Update Post Socket to support Multiple "Clients" not in a single Bus.

RelayClient/MainPage.xaml.cs

@@ -2,22 +2,92 @@
 
 public partial class MainPage : ContentPage
 {
-    int count = 0;
+    private readonly string _username;
 
-    public MainPage()
+    public MainPage(string username)
     {
         InitializeComponent();
+
+        _username = username;
+        UserLabel.Text = $"Logged in as: {_username}";
+
+        ChatSimulator.MessageSent += OnMessageSent;
     }
 
-    private void OnCounterClicked(object? sender, EventArgs e)
+    private void SendButton_OnClicked(object? sender, EventArgs e)
     {
-        count++;
+        SendMessage();
+    }
 
-        if (count == 1)
-            CounterBtn.Text = $"Clicked {count} time";
-        else
-            CounterBtn.Text = $"Clicked {count} times";
+    private void MessageEntry_OnCompleted(object? sender, EventArgs e)
+    {
+        SendMessage();
+    }
 
-        SemanticScreenReader.Announce(CounterBtn.Text);
+    private void SendMessage()
+    {
+        var text = MessageEntry.Text?.Trim();
+
+        if (string.IsNullOrWhiteSpace(text))
+            return;
+
+        ChatSimulator.Send(_username, text);
+
+        Console.WriteLine($"[{_username}] sent message: {text}");
+
+        MessageEntry.Text = string.Empty;
+        MessageEntry.Focus();
+    }
+
+    private void OnMessageSent(ChatMessage message)
+    {
+        MainThread.BeginInvokeOnMainThread(async () =>
+        {
+            bool isOwnMessage = message.SenderUsername == _username;
+
+            var bubble = new Border
+            {
+                StrokeThickness = 1,
+                Padding = 10,
+                Margin = isOwnMessage
+                    ? new Thickness(40, 0, 0, 0)
+                    : new Thickness(0, 0, 40, 0),
+                HorizontalOptions = isOwnMessage
+                    ? LayoutOptions.End
+                    : LayoutOptions.Start,
+                Content = new VerticalStackLayout
+                {
+                    Spacing = 2,
+                    Children =
+                    {
+                        new Label
+                        {
+                            Text = message.SenderUsername,
+                            FontAttributes = FontAttributes.Bold,
+                            FontSize = 12
+                        },
+                        new Label
+                        {
+                            Text = message.Text,
+                            FontSize = 14
+                        },
+                        new Label
+                        {
+                            Text = message.Timestamp.ToString("h:mm tt"),
+                            FontSize = 10
+                        }
+                    }
+                }
+            };
+
+            MessagesLayout.Children.Add(bubble);
+            await MessagesScrollView.ScrollToAsync(MessagesLayout, ScrollToPosition.End, true);
+        });
+    }
+
+    protected override void OnDisappearing()
+    {
+        ChatSimulator.MessageSent -= OnMessageSent;
+        base.OnDisappearing();
     }
 }