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>

Pages/VersionPage.xaml

@@ -38,7 +38,7 @@
                          GroupName="Version" Margin="0,0,0,10">
                 <StackPanel Margin="8,2">
                     <TextBlock Text="Office 2019" FontSize="18" FontWeight="SemiBold"/>
-                    <TextBlock Text="2019. szeptemberi kiadás · Windows 7 / 8.1 / 10"
+                    <TextBlock Text="2019. szeptemberi kiadás · Windows 7 / 8.1 / 10 / 11 · Támogatás lejárt: 2025.10."
                                FontSize="12" Foreground="{StaticResource TextSecondaryBrush}" Margin="0,2,0,0"/>
                 </StackPanel>
             </RadioButton>