Two-state flow with go-live dialog, unmissable live indicators, taskbar overlay

GoLiveWindow.xaml

@@ -0,0 +1,131 @@
+<Window x:Class="ytLive.GoLiveWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Start Stream" Height="430" Width="520"
+        WindowStartupLocation="CenterOwner" ResizeMode="NoResize"
+        ShowInTaskbar="False" Background="#1a1a2e">
+
+    <Window.Resources>
+        <BooleanToVisibilityConverter x:Key="BoolToVis"/>
+
+        <Style x:Key="GoLiveButton" TargetType="Button">
+            <Setter Property="Background" Value="#e94560"/>
+            <Setter Property="Foreground" Value="White"/>
+            <Setter Property="FontSize" Value="13"/>
+            <Setter Property="FontWeight" Value="SemiBold"/>
+            <Setter Property="Padding" Value="16,8"/>
+            <Setter Property="BorderThickness" Value="0"/>
+            <Setter Property="Cursor" Value="Hand"/>
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="Button">
+                        <Border Background="{TemplateBinding Background}"
+                                CornerRadius="4"
+                                Padding="{TemplateBinding Padding}">
+                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                        </Border>
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </Style>
+
+        <Style x:Key="GoLiveButtonSecondary" TargetType="Button" BasedOn="{StaticResource GoLiveButton}">
+            <Setter Property="Background" Value="#16213e"/>
+        </Style>
+
+        <Style x:Key="GoLiveLabel" TargetType="TextBlock">
+            <Setter Property="Foreground" Value="#a0a0b0"/>
+            <Setter Property="FontSize" Value="12"/>
+            <Setter Property="Margin" Value="0,0,0,4"/>
+        </Style>
+
+        <Style x:Key="GoLiveTextBox" TargetType="TextBox">
+            <Setter Property="Background" Value="#0f3460"/>
+            <Setter Property="Foreground" Value="#e0e0e0"/>
+            <Setter Property="BorderThickness" Value="0"/>
+            <Setter Property="Padding" Value="8,6"/>
+            <Setter Property="FontSize" Value="13"/>
+            <Setter Property="CaretBrush" Value="White"/>
+            <Setter Property="Margin" Value="0,0,0,12"/>
+        </Style>
+
+        <Style x:Key="GoLiveCombo" TargetType="ComboBox">
+            <Setter Property="Background" Value="#0f3460"/>
+            <Setter Property="Foreground" Value="#e0e0e0"/>
+            <Setter Property="BorderThickness" Value="0"/>
+            <Setter Property="Padding" Value="8,6"/>
+            <Setter Property="FontSize" Value="13"/>
+            <Setter Property="Margin" Value="0,0,0,12"/>
+            <Setter Property="HorizontalContentAlignment" Value="Left"/>
+        </Style>
+    </Window.Resources>
+
+    <Grid Margin="24">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+
+        <TextBlock Grid.Row="0" Text="Start Stream" FontSize="18" FontWeight="Bold"
+                   Foreground="#e0e0e0" Margin="0,0,0,16"/>
+
+        <!-- ACCOUNT -->
+        <StackPanel Grid.Row="1" Margin="0,0,0,16">
+            <TextBlock Text="YOUTUBE ACCOUNT" FontSize="12" FontWeight="SemiBold"
+                       Foreground="#a0a0b0" Margin="0,0,0,8"/>
+
+            <!-- Not signed in -->
+            <StackPanel Visibility="{Binding ShowSignIn, Converter={StaticResource BoolToVis}}">
+                <TextBlock Text="Sign in to connect your channel." Style="{StaticResource GoLiveLabel}"/>
+                <Button Content="Sign In" Command="{Binding SignInCommand}"
+                        Style="{StaticResource GoLiveButtonSecondary}" HorizontalAlignment="Left"
+                        Padding="20,8" Margin="0,4,0,0"/>
+            </StackPanel>
+
+            <!-- Signed in: saved account as default + change option -->
+            <StackPanel Visibility="{Binding ShowAccount, Converter={StaticResource BoolToVis}}">
+                <StackPanel Orientation="Horizontal" Margin="0,0,0,4">
+                    <TextBlock Text="{Binding AccountName}" FontSize="14" FontWeight="SemiBold"
+                               Foreground="#e0e0e0" VerticalAlignment="Center"/>
+                    <TextBlock Text="(signed in)" Foreground="#7fb069" FontSize="12"
+                               VerticalAlignment="Center" Margin="8,0,0,0"/>
+                </StackPanel>
+                <Button Content="Change Account" Command="{Binding ChangeAccountCommand}"
+                        Style="{StaticResource GoLiveButtonSecondary}" HorizontalAlignment="Left"
+                        Padding="16,6" Margin="0,4,0,0" FontSize="12"/>
+            </StackPanel>
+        </StackPanel>
+
+        <!-- STREAM METADATA -->
+        <StackPanel Grid.Row="2">
+            <TextBlock Text="STREAM DETAILS" FontSize="12" FontWeight="SemiBold"
+                       Foreground="#a0a0b0" Margin="0,0,0,8"/>
+
+            <TextBlock Text="Title" Style="{StaticResource GoLiveLabel}"/>
+            <TextBox Style="{StaticResource GoLiveTextBox}"
+                     Text="{Binding StreamTitle, UpdateSourceTrigger=PropertyChanged}"/>
+
+            <TextBlock Text="Description" Style="{StaticResource GoLiveLabel}"/>
+            <TextBox Style="{StaticResource GoLiveTextBox}" Height="60" AcceptsReturn="True"
+                     Text="{Binding StreamDescription, UpdateSourceTrigger=PropertyChanged}"
+                     VerticalScrollBarVisibility="Auto"/>
+
+            <TextBlock Text="Visibility" Style="{StaticResource GoLiveLabel}"/>
+            <ComboBox Style="{StaticResource GoLiveCombo}"
+                      ItemsSource="{Binding Visibilities}"
+                      SelectedItem="{Binding Visibility}"/>
+        </StackPanel>
+
+        <!-- ACTIONS -->
+        <StackPanel Grid.Row="5" Orientation="Horizontal" HorizontalAlignment="Right">
+            <Button Content="Cancel" Command="{Binding CancelCommand}"
+                    Style="{StaticResource GoLiveButtonSecondary}" Margin="0,0,8,0"/>
+            <Button Content="Start Stream" Command="{Binding StartCommand}"
+                    Style="{StaticResource GoLiveButton}" MinWidth="110"/>
+        </StackPanel>
+    </Grid>
+</Window>

GoLiveWindow.xaml.cs

@@ -0,0 +1,15 @@
+using System.Windows;
+using ytLive.ViewModels;
+
+namespace ytLive;
+
+public partial class GoLiveWindow : Window
+{
+    public GoLiveWindow(GoLiveViewModel viewModel)
+    {
+        InitializeComponent();
+        DataContext = viewModel;
+        viewModel.StartRequested += () => DialogResult = true;
+        viewModel.CancelRequested += () => DialogResult = false;
+    }
+}

MainWindow.xaml

@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:vm="clr-namespace:ytLive.ViewModels"
         mc:Ignorable="d"
-        Title="ytLive" Height="720" Width="1280"
+        Title="{Binding WindowTitle}" Height="720" Width="1280"
         Background="#1a1a2e"
         WindowStartupLocation="CenterScreen">
 
@@ -13,9 +13,26 @@
         <vm:MainViewModel/>
     </Window.DataContext>
 
+    <Window.TaskbarItemInfo>
+        <TaskbarItemInfo x:Name="TaskbarInfo"/>
+    </Window.TaskbarItemInfo>
+
     <Window.Resources>
         <BooleanToVisibilityConverter x:Key="BoolToVis"/>
 
+        <!-- Red dot shown in the taskbar icon while live -->
+        <DrawingImage x:Key="LiveOverlay">
+            <DrawingImage.Drawing>
+                <DrawingGroup>
+                    <GeometryDrawing Brush="#e94560">
+                        <GeometryDrawing.Geometry>
+                            <EllipseGeometry Center="8,8" RadiusX="8" RadiusY="8"/>
+                        </GeometryDrawing.Geometry>
+                    </GeometryDrawing>
+                </DrawingGroup>
+            </DrawingImage.Drawing>
+        </DrawingImage>
+
         <!-- Base button style -->
         <Style x:Key="YtButton" TargetType="Button">
             <Setter Property="Background" Value="#e94560"/>
@@ -72,7 +89,7 @@
         </Grid.RowDefinitions>
 
         <!-- ═══ TOP BAR: Stream Controls ═══ -->
-        <Border Grid.Row="0" Background="#16213e" Padding="16,10">
+        <Border Grid.Row="0" Background="{Binding TopBarBackground}" Padding="16,10">
             <Grid>
                 <Grid.ColumnDefinitions>
                     <ColumnDefinition Width="Auto"/>
@@ -85,20 +102,23 @@
                            Foreground="#e94560" FontSize="22" FontWeight="Bold"
                            VerticalAlignment="Center" Margin="0,0,24,0"/>
 
-                <!-- Stream Title -->
+                <!-- LIVE badge (center) -->
-                <TextBox Grid.Column="1" Style="{StaticResource YtTextBox}"
+                <StackPanel Grid.Column="1" Orientation="Horizontal"
-                         Text="{Binding StreamTitle, UpdateSourceTrigger=PropertyChanged}"
+                            HorizontalAlignment="Center" VerticalAlignment="Center"
-                         Width="400" HorizontalAlignment="Left"
+                            Visibility="{Binding LiveIndicatorVisible, Converter={StaticResource BoolToVis}}">
-                         VerticalAlignment="Center"/>
+                    <Ellipse Width="12" Height="12" Fill="White" VerticalAlignment="Center"
+                             Opacity="{Binding LivePulseOpacity}"/>
+                    <TextBlock Text="LIVE" Foreground="White" FontSize="16" FontWeight="Bold"
+                               VerticalAlignment="Center" Margin="8,0,0,0"/>
+                    <TextBlock Text="{Binding LiveElapsedText}" Foreground="White" FontSize="14"
+                               FontFamily="Consolas" VerticalAlignment="Center" Margin="14,0,0,0"/>
+                </StackPanel>
 
-                <!-- Primary actions: one relevant button per state -->
+                <!-- Single two-state action button -->
                 <StackPanel Grid.Column="2" Orientation="Horizontal" VerticalAlignment="Center">
-                    <Button Content="Connect" Style="{StaticResource YtButton}"
+                    <Button Content="Start Stream" Style="{StaticResource YtButton}"
-                            Command="{Binding ConnectCommand}"
+                            Command="{Binding StartStreamCommand}"
-                            Visibility="{Binding ShowConnect, Converter={StaticResource BoolToVis}}"/>
+                            Visibility="{Binding IsOffline, Converter={StaticResource BoolToVis}}"/>
-                    <Button Content="Go Live" Style="{StaticResource YtButton}"
-                            Command="{Binding GoLiveCommand}"
-                            Visibility="{Binding ShowGoLive, Converter={StaticResource BoolToVis}}"/>
                     <Button Content="End Stream" Style="{StaticResource YtButton}"
                             Background="#333" Command="{Binding EndStreamCommand}"
                             Visibility="{Binding IsLive, Converter={StaticResource BoolToVis}}"/>
@@ -151,7 +171,8 @@
             </Border>
 
             <!-- CENTER: Preview Area -->
-            <Border Grid.Column="1" Background="#0a0a1a" CornerRadius="6" Margin="8,0">
+            <Border Grid.Column="1" Background="#0a0a1a" CornerRadius="6" Margin="8,0"
+                    BorderBrush="{Binding PreviewGlowBrush}" BorderThickness="{Binding PreviewGlowThickness}">
                 <Grid>
                     <TextBlock Text="Preview" Foreground="#333" FontSize="24"
                                HorizontalAlignment="Center" VerticalAlignment="Center"/>

MainWindow.xaml.cs

@@ -1,11 +1,32 @@
-using System.Windows;
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Media;
+using ytLive.ViewModels;
 
 namespace ytLive;
 
 public partial class MainWindow : Window
 {
+    private readonly MainViewModel _viewModel;
+
     public MainWindow()
     {
         InitializeComponent();
+        _viewModel = (MainViewModel)DataContext;
+        _viewModel.PropertyChanged += OnViewModelPropertyChanged;
+        UpdateTaskbarOverlay();
+    }
+
+    private void OnViewModelPropertyChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (e.PropertyName == nameof(MainViewModel.IsLive))
+            UpdateTaskbarOverlay();
+    }
+
+    private void UpdateTaskbarOverlay()
+    {
+        TaskbarInfo.Overlay = _viewModel.IsLive
+            ? (ImageSource)FindResource("LiveOverlay")
+            : null;
     }
 }

TASKS.md

@@ -17,7 +17,11 @@
 
 **Goal:** Fully working Google OAuth2 flow — user clicks "YouTube", browser opens, authorization callback lands, channel info is stored.
 
-**Design constraint:** Sign-in must NEVER block core exploration. Users can build scenes, add sources, and audition the software without authenticating. But **going live requires authentication** — "Go Live" only appears once connected. OAuth is what unlocks the actual broadcast (plus live chat, scheduling, and YouTube-side health).
+**Design constraint:** Sign-in must NEVER block core exploration. Users can build scenes, add sources, and audition the software without authenticating. But **going live requires authentication** — the "Start Stream" dialog is where the account sign-in lives, alongside all stream metadata.
+
+**Two-state flow:** There is no separate "Connect" button. The top bar shows a single button — **Start Stream** when idle, **End Stream** when live. Clicking Start Stream opens one dialog that supplies everything: account (previously-saved account shown as default, with a Change Account action) + title/description/visibility.
+
+**Live indicators (unmissable):** Top bar + window title bar flip red, a pulsing **● LIVE** badge with elapsed timer appears in the top bar, the preview area gets a red glow, and the taskbar icon shows a red overlay dot. Window title bar shows the stream title once validated.
 
 ### Requirements:
 
@@ -25,8 +29,8 @@
 2. **Local HTTP listener** — `HttpListener` on `http://localhost:PORT/oauth2/callback` to catch the redirect
 3. **Browser launch** — open the authorization URL in the default browser
 4. **Token persistence** — store access/refresh tokens securely (Windows DPAPI), reload on startup
-5. **UI state** — account name/avatar shown when connected; "sign in (optional)" affordance, never a gate
+5. **UI state** — account shown in the Start Stream dialog; "Change Account" action triggers re-auth
-6. **Go Live gated on auth** — "Go Live" button only visible once authenticated; scene building works without it
+6. **Go Live gated on auth** — Start Stream dialog requires sign-in to enable the Start button; scene building works without it
 
 ### Tests:
 

ViewModels/GoLiveViewModel.cs

@@ -0,0 +1,85 @@
+using System.Windows.Input;
+using ytLive.Helpers;
+
+namespace ytLive.ViewModels;
+
+public class GoLiveViewModel : ViewModelBase
+{
+    private bool _isSignedIn;
+    private string _accountName = string.Empty;
+    private string _streamTitle = string.Empty;
+    private string _streamDescription = string.Empty;
+    private string _visibility = "Public";
+
+    public bool IsSignedIn
+    {
+        get => _isSignedIn;
+        set
+        {
+            if (SetProperty(ref _isSignedIn, value))
+            {
+                OnPropertyChanged(nameof(ShowSignIn));
+                OnPropertyChanged(nameof(ShowAccount));
+            }
+        }
+    }
+
+    public bool ShowSignIn => !IsSignedIn;
+    public bool ShowAccount => IsSignedIn;
+
+    public string AccountName
+    {
+        get => _accountName;
+        set => SetProperty(ref _accountName, value);
+    }
+
+    public string StreamTitle
+    {
+        get => _streamTitle;
+        set => SetProperty(ref _streamTitle, value);
+    }
+
+    public string StreamDescription
+    {
+        get => _streamDescription;
+        set => SetProperty(ref _streamDescription, value);
+    }
+
+    public string Visibility
+    {
+        get => _visibility;
+        set => SetProperty(ref _visibility, value);
+    }
+
+    public string[] Visibilities { get; } = { "Public", "Unlisted", "Private" };
+
+    public ICommand SignInCommand { get; }
+    public ICommand ChangeAccountCommand { get; }
+    public ICommand StartCommand { get; }
+    public ICommand CancelCommand { get; }
+
+    public GoLiveViewModel()
+    {
+        SignInCommand = new RelayCommand(_ => SignIn());
+        ChangeAccountCommand = new RelayCommand(_ => ChangeAccount());
+        StartCommand = new RelayCommand(_ => StartRequested?.Invoke(), _ => IsSignedIn);
+        CancelCommand = new RelayCommand(_ => CancelRequested?.Invoke());
+    }
+
+    public event Action? StartRequested;
+    public event Action? CancelRequested;
+
+    private void SignIn()
+    {
+        // TODO: OAuth2 flow; for now simulate a successful sign-in
+        AccountName = "Connected Channel";
+        IsSignedIn = true;
+    }
+
+    private void ChangeAccount()
+    {
+        // TODO: re-run OAuth2; for now simulate signing out
+        IsSignedIn = false;
+        AccountName = string.Empty;
+    }
+}

ViewModels/MainViewModel.cs

@@ -1,5 +1,7 @@
 using System.Collections.ObjectModel;
+using System.Windows;
 using System.Windows.Input;
+using System.Windows.Threading;
 using ytLive.Helpers;
 using ytLive.Models;
 using ytLive.Services;
@@ -11,13 +13,21 @@ public class MainViewModel : ViewModelBase
     private readonly YouTubeAuthService _youtubeAuth;
     private readonly YouTubeStreamService _youtubeStream;
     private readonly YouTubeChatService _youtubeChat;
+    private readonly DispatcherTimer _liveTimer;
 
     private Scene? _activeScene;
     private StreamStatus _streamStatus = StreamStatus.Offline;
     private StreamHealth _currentHealth = new();
     private string _streamTitle = string.Empty;
-    private string _streamKey = string.Empty;
+    private string _streamDescription = string.Empty;
-    private bool _isYouTubeConnected;
+    private string _streamVisibility = "Public";
+    private string _windowTitle = "ytLive";
+    private string _topBarBackground = "#16213e";
+    private string _previewGlowBrush = "Transparent";
+    private Thickness _previewGlowThickness = new(0);
+    private string _liveElapsedText = "00:00:00";
+    private double _livePulseOpacity = 1.0;
+    private TimeSpan _liveElapsed;
 
     public ObservableCollection<Scene> Scenes { get; } = new();
     public ObservableCollection<ChatMessage> ChatMessages { get; } = new();
@@ -37,13 +47,15 @@ public class MainViewModel : ViewModelBase
             {
                 OnPropertyChanged(nameof(IsOffline));
                 OnPropertyChanged(nameof(IsLive));
-                OnPropertyChanged(nameof(ShowGoLive));
+                OnPropertyChanged(nameof(LiveIndicatorVisible));
+                UpdateLiveVisuals();
             }
         }
     }
 
     public bool IsOffline => StreamStatus == StreamStatus.Offline;
     public bool IsLive => StreamStatus == StreamStatus.Streaming;
+    public bool LiveIndicatorVisible => IsLive;
 
     public StreamHealth CurrentHealth
     {
@@ -57,33 +69,58 @@ public class MainViewModel : ViewModelBase
         set => SetProperty(ref _streamTitle, value);
     }
 
-    public string StreamKey
+    public string StreamDescription
     {
-        get => _streamKey;
+        get => _streamDescription;
-        set => SetProperty(ref _streamKey, value);
+        set => SetProperty(ref _streamDescription, value);
     }
 
-    public bool IsYouTubeConnected
+    public string StreamVisibility
     {
-        get => _isYouTubeConnected;
+        get => _streamVisibility;
-        set
+        set => SetProperty(ref _streamVisibility, value);
-        {
-            if (SetProperty(ref _isYouTubeConnected, value))
-            {
-                OnPropertyChanged(nameof(ShowConnect));
-                OnPropertyChanged(nameof(ShowGoLive));
-            }
-        }
     }
 
-    public bool ShowConnect => !IsYouTubeConnected;
+    public string WindowTitle
-    public bool ShowGoLive => IsYouTubeConnected && IsOffline;
+    {
+        get => _windowTitle;
+        set => SetProperty(ref _windowTitle, value);
+    }
+
+    public string TopBarBackground
+    {
+        get => _topBarBackground;
+        set => SetProperty(ref _topBarBackground, value);
+    }
+
+    public string PreviewGlowBrush
+    {
+        get => _previewGlowBrush;
+        set => SetProperty(ref _previewGlowBrush, value);
+    }
+
+    public Thickness PreviewGlowThickness
+    {
+        get => _previewGlowThickness;
+        set => SetProperty(ref _previewGlowThickness, value);
+    }
+
+    public string LiveElapsedText
+    {
+        get => _liveElapsedText;
+        set => SetProperty(ref _liveElapsedText, value);
+    }
+
+    public double LivePulseOpacity
+    {
+        get => _livePulseOpacity;
+        set => SetProperty(ref _livePulseOpacity, value);
+    }
 
     // Commands
     public ICommand AddSceneCommand { get; }
     public ICommand RemoveSceneCommand { get; }
-    public ICommand ConnectCommand { get; }
+    public ICommand StartStreamCommand { get; }
-    public ICommand GoLiveCommand { get; }
     public ICommand EndStreamCommand { get; }
 
     public MainViewModel()
@@ -94,10 +131,12 @@ public class MainViewModel : ViewModelBase
 
         _youtubeChat.MessageReceived += OnChatMessageReceived;
 
+        _liveTimer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(1) };
+        _liveTimer.Tick += OnLiveTimerTick;
+
         AddSceneCommand = new RelayCommand(_ => AddScene());
         RemoveSceneCommand = new RelayCommand(scene => RemoveScene(scene as Scene));
-        ConnectCommand = new RelayCommand(_ => ConnectYouTube());
+        StartStreamCommand = new RelayCommand(_ => BeginGoLive());
-        GoLiveCommand = new RelayCommand(_ => StartStream(), _ => IsYouTubeConnected && IsOffline);
         EndStreamCommand = new RelayCommand(_ => StopStream(), _ => IsLive);
 
         // Start with a default scene
@@ -129,25 +168,54 @@ public class MainViewModel : ViewModelBase
         });
     }
 
-    private async void StartStream()
+    private void BeginGoLive()
     {
-        StreamStatus = StreamStatus.Connecting;
+        var dialog = new GoLiveViewModel();
-
+        var window = new ytLive.GoLiveWindow(dialog) { Owner = System.Windows.Application.Current.MainWindow };
-        // TODO: Initialize capture pipeline, encode, and push to RTMP
+        if (window.ShowDialog() == true)
-        // For now, simulate connection
+        {
-        await Task.Delay(500);
+            StreamTitle = dialog.StreamTitle;
-        StreamStatus = StreamStatus.Streaming;
+            StreamDescription = dialog.StreamDescription;
+            StreamVisibility = dialog.Visibility;
+            WindowTitle = string.IsNullOrWhiteSpace(dialog.StreamTitle)
+                ? "ytLive"
+                : $"{dialog.StreamTitle} — ytLive";
+            StreamStatus = StreamStatus.Streaming;
+        }
     }
 
     private void StopStream()
     {
         StreamStatus = StreamStatus.Offline;
+        WindowTitle = "ytLive";
     }
 
-    private void ConnectYouTube()
+    private void UpdateLiveVisuals()
     {
-        // TODO: Launch OAuth2 flow in browser
+        var live = IsLive;
-        // For now, this is a stub
+        TopBarBackground = live ? "#e94560" : "#16213e";
-        IsYouTubeConnected = false;
+        PreviewGlowBrush = live ? "#e94560" : "Transparent";
+        PreviewGlowThickness = live ? new Thickness(3) : new Thickness(0);
+
+        if (live)
+        {
+            _liveElapsed = TimeSpan.Zero;
+            LiveElapsedText = "00:00:00";
+            LivePulseOpacity = 1.0;
+            _liveTimer.Start();
+        }
+        else
+        {
+            _liveTimer.Stop();
+            LiveElapsedText = "00:00:00";
+            LivePulseOpacity = 1.0;
+        }
+    }
+
+    private void OnLiveTimerTick(object? sender, EventArgs e)
+    {
+        _liveElapsed = _liveElapsed.Add(TimeSpan.FromSeconds(1));
+        LiveElapsedText = _liveElapsed.ToString(@"hh\:mm\:ss");
+        LivePulseOpacity = LivePulseOpacity > 0.5 ? 0.35 : 1.0;
     }
 }