fix(build): the wordmark number counts commits again, not compiles

GenerateBuildStamp read BuildCounter.txt, added 1 and wrote it back on every CoreCompile, so
the number tracked BUILDS: a day of iteration reached #1122 against 563 commits. It now uses
git rev-list count of HEAD, which is what the comment always claimed (and why the file existed
in .gitignore). No counter file, no drift; a missing git still falls back to the start.

Also moves the MIC and lip-sync volume bars up one line: both were pinned to the floor of their
bay by a star row plus VerticalAlignment=Bottom. They now sit directly under their headers,
with the auto rows sized to content.

Controls/AudioDock.xaml

@@ -31,7 +31,7 @@
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
                             <RowDefinition Height="Auto"/>
-                            <RowDefinition Height="*"/>
+                            <RowDefinition Height="Auto"/>
                         </Grid.RowDefinitions>
                         <Grid Grid.Row="0" Cursor="Hand" ToolTip="Change microphone" MouseLeftButtonUp="MicLabel_MouseLeftButtonUp">
                             <Grid.ColumnDefinitions>
@@ -47,7 +47,7 @@
                         </Grid>
                         <controls:SegmentMeter Grid.Row="1" Height="10" Margin="0,6,0,0" Orientation="Horizontal"
                                                Level="{Binding MicMeterFraction}" Segments="24"/>
-                        <DockPanel Grid.Row="2" Margin="0,6,0,0" VerticalAlignment="Bottom">
+                        <DockPanel Grid.Row="2" Margin="0,6,0,0">
                             <Button DockPanel.Dock="Left" Width="24" Height="20" Margin="0,0,6,0"
                                     Style="{StaticResource YtButtonSecondary}" Padding="0"
                                     Command="{Binding ToggleMicMuteCommand}" ToolTip="{Binding MicMuteText}">
@@ -177,7 +177,7 @@
                     <Grid>
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto"/>
-                            <RowDefinition Height="*"/>
+                            <RowDefinition Height="Auto"/>
                         </Grid.RowDefinitions>
                         <Grid Grid.Row="0">
                             <Grid.ColumnDefinitions>
@@ -191,7 +191,7 @@
                                        FontFamily="{StaticResource FontFamily.Mono}" TextAlignment="Right"
                                        Foreground="{StaticResource Brush.Tertiary}" Text="{Binding SyncOffsetLabel}"/>
                         </Grid>
-                        <StackPanel Grid.Row="1" VerticalAlignment="Bottom">
+                        <StackPanel Grid.Row="1" Margin="0,6,0,0">
                             <Slider Minimum="-200" Maximum="200" SmallChange="5" LargeChange="25"
                                     TickFrequency="5" IsSnapToTickEnabled="True"
                                     Value="{Binding AudioSyncOffsetMs, Mode=TwoWay}" VerticalAlignment="Center"/>