TASK 4 ship step 7: one-click go live + private-only enforcement (req 8) — the Go Live dialog is locked to Private (GoLiveViewModel.Visibility is a get-only string, no dropdown; settings' dead Default Visibility dropdown + Visibilities/DefaultStreamVisibility removed); YouTubeStreamService.CreateBroadcast always sends privacyStatus='private' and gained an injectable HttpClient? http = null seam; BeginGoLive fires CreateBroadcastAsync which stashes _currentBroadcastId for TASK 5's bind/transition (failure → StreamStatus.Error via AppLog, never a crash) alongside the frame pump, and StopStream clears it; the REC sign shows a dark-red PRIVATE badge next to REC whenever the live stream is private (IsLivePrivate) — the broadcast-insert integration test asserts the request body carries privacyStatus private (RecordingHandler seam) + a no-session guard test — 173 tests passing, 0 warnings

MainWindow.xaml

@@ -105,6 +105,11 @@
                              Fill="{Binding RecDotBrush}" Opacity="{Binding RecDotOpacity}"/>
                     <TextBlock Text="REC" FontSize="16" FontWeight="Bold"
                                Foreground="{Binding RecTextBrush}" VerticalAlignment="Center" Margin="8,0,0,0"/>
+                    <Border Background="#8f1f1f" CornerRadius="3" Padding="6,1" Margin="8,0,0,0"
+                            VerticalAlignment="Center"
+                            Visibility="{Binding IsLivePrivate, Converter={StaticResource BoolToVis}}">
+                        <TextBlock Text="PRIVATE" FontSize="11" FontWeight="Bold" Foreground="White"/>
+                    </Border>
                     <TextBlock Text="{Binding LiveElapsedText}" Foreground="White" FontSize="14"
                                FontFamily="Consolas" VerticalAlignment="Center" Margin="14,0,0,0"
                                Visibility="{Binding IsLive, Converter={StaticResource BoolToVis}}"/>
@@ -1064,12 +1069,7 @@
                                  Text="{Binding DefaultStreamDescription, UpdateSourceTrigger=PropertyChanged}"
                                  VerticalScrollBarVisibility="Auto"/>
 
-                        <TextBlock Text="Default Visibility" Style="{StaticResource YtLabel}" Margin="0,0,0,4"/>
-                        <ComboBox Style="{StaticResource YtComboBox}" HorizontalAlignment="Left" MinWidth="140"
-                                  ItemsSource="{Binding Visibilities}"
-                                  SelectedItem="{Binding DefaultStreamVisibility}"/>
-
-                        <TextBlock Text="These prefill the Start Stream dialog. Scene and stream settings are stored on the stream itself."
+                        <TextBlock Text="These prefill the Start Stream dialog. Streams always start Private — change visibility on YouTube after going live."
                                    Style="{StaticResource YtLabel}" Margin="0,16,0,0" TextWrapping="Wrap"/>
                     </StackPanel>