UI: ASTERION logo left of PROSERVE wordmark + minimize on launch

Brand mark
----------
Resources/logo-asterion-white.png embedded as a WPF Resource. Placed
in the top-bar StackPanel before the PROSERVE Pirulen wordmark, at
36px height, with HighQuality bitmap scaling and SnapsToDevicePixels
to keep the white logo crisp against the dark chrome.

Minimize on launch
------------------
Once a Proserve version is started via _processLauncher.Launch(),
the MainWindow drops to WindowState.Minimized so it doesn't sit on
top of the game. The launcher stays running (so the user can come
back to install / switch / see the badge license), just out of the way.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/PSLauncher.App/Views/MainWindow.xaml

@@ -193,6 +193,12 @@
                 </Grid.ColumnDefinitions>
                 <!-- Col 1 : brand -->
                 <StackPanel Grid.Column="0" Orientation="Horizontal" VerticalAlignment="Center">
+                    <Image Source="pack://application:,,,/Resources/logo-asterion-white.png"
+                           Height="36"
+                           VerticalAlignment="Center"
+                           Margin="0,0,14,0"
+                           SnapsToDevicePixels="True"
+                           RenderOptions.BitmapScalingMode="HighQuality" />
                     <TextBlock Text="PROSERVE"
                                FontFamily="{StaticResource Font.Brand}"
                                FontSize="22"