Resolution dropdown, list-focus preservation, unified dark theme, startup logging, and memory map

- Bottom-bar resolution dropdown (1080p60/1080p30/720p60/480p30) with tooltip
  on finding upload bandwidth; disabled while live; no in-app speed test
- FocusPreservingListBox keeps selection/focus coherent when a selected
  scene/source is deleted (skip hidden scenes; leave list when empty)
- Themes/Controls.xaml: single dark-theme dictionary merged once in App.xaml;
  custom ComboBox template fixes SelectionBoxItem rendering; GoLiveWindow and
  ReuseImageDialog consolidated onto shared styles
- AppLog file logger + AppDomain/Dispatcher exception hooks; checkpointed
  MainWindow/VM/dialog constructors (caught MenuItemRole.Separator XAML crash)
- Memory map: schema.md conventions, per-directory index.md, updated ai.md/
  TASKS.md/README.md (OAuth creds real; token persistence still pending)

ReuseImageDialog.xaml

@@ -7,30 +7,7 @@
         ShowInTaskbar="False" Background="#1a1a2e">
 
     <Window.Resources>
-        <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>
+        <ResourceDictionary>
 
         <Style x:Key="CandidateItem" TargetType="ListBoxItem">
             <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
@@ -53,6 +30,7 @@
                 </Setter.Value>
             </Setter>
         </Style>
+        </ResourceDictionary>
     </Window.Resources>
 
     <Grid Margin="24">
@@ -95,11 +73,11 @@
 
         <StackPanel Grid.Row="3" Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,12,0,0">
             <Button Content="New Image…" Command="{Binding NewImageCommand}"
-                    Style="{StaticResource GoLiveButtonSecondary}" Margin="0,0,8,0"/>
+                    Style="{StaticResource YtButtonSecondary}" Margin="0,0,8,0"/>
             <Button Content="Cancel" Command="{Binding CancelCommand}"
-                    Style="{StaticResource GoLiveButtonSecondary}" Margin="0,0,8,0"/>
+                    Style="{StaticResource YtButtonSecondary}" Margin="0,0,8,0"/>
             <Button Content="Use Selected" Command="{Binding UseSelectedCommand}"
-                    Style="{StaticResource GoLiveButton}" MinWidth="110"/>
+                    Style="{StaticResource YtButton}" MinWidth="110"/>
         </StackPanel>
     </Grid>
 </Window>