v1.04 — Config layout, button contrast, Skype default, Win11 for 2019

- Arch + Language side by side on config page
- Removed redundant hint text under app checkboxes
- Primary button: white text on blue (TextElement.Foreground fix)
- Skype for Business unchecked by default
- Office 2019: added Windows 11 support, end-of-support note
- Version display synced to v1.04

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

MainWindow.xaml

@@ -41,7 +41,7 @@
                                    Foreground="{StaticResource TextSecondaryBrush}" Margin="0,-2,0,0"/>
                     </StackPanel>
                 </StackPanel>
-                <TextBlock Text="v1.02" HorizontalAlignment="Right" VerticalAlignment="Center"
+                <TextBlock Text="v1.04" HorizontalAlignment="Right" VerticalAlignment="Center"
                            FontSize="12" Foreground="{StaticResource TextSecondaryBrush}"/>
             </Grid>
         </Border>