feat: redesign Pump page with Fluent card layout, bottom snackbar, and RPM chart

- Replace sub-nav + HiddenTabsTabControl with 3-column Fluent card layout:
  PumpCommandsCard (vertical ME/FBKW/PreIn sliders) + DfiCalibrationCard /
  PumpLiveDataCard (KPI tiles + RPM rolling chart + redesigned status bytes) /
  PumpIdentificationCard + DtcCard
- Add PumpTopStripView: pump selector, model badge, CAN + K-Line chips
- Move immobilizer unlock to MainWindow bottom snackbar (UnlockSnackbarView):
  auto-close on success after 3 s, persist on failure with manual Dismiss
- Redesign StatusDisplayView to 2×8 rounded 28px tiles with bit index + tooltip
- Add NullToVisibilityConverter; add SnackbarShell, PumpCard, and related styles
- Delete obsolete views: UnlockProgressDialog, UnlockPanelView,
  PumpIdentificationPanelView, PumpLiveDataView, DfiManageView,
  DtcListView, PumpControlView
- PumpPageViewModel: remove PumpSubPage enum, add RpmChart wired to Root.PumpRpm

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Resources/Styles.xaml

@@ -1,9 +1,13 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:conv="clr-namespace:HC_APTBS.Converters">
 
     <!-- Boolean → Visibility converter (shared across views) -->
     <BooleanToVisibilityConverter x:Key="BoolToVis"/>
 
+    <!-- Null → Collapsed, non-null → Visible -->
+    <conv:NullToVisibilityConverter x:Key="NullToVis"/>
+
     <!-- LCD blue gradient border -->
     <Style x:Key="LcdBlue" TargetType="Border">
         <Setter Property="BorderBrush" Value="Black"/>
@@ -160,6 +164,62 @@
         <Setter Property="Margin" Value="6,0,4,0"/>
     </Style>
 
+    <!-- ── Pump page card chrome (same Fluent look as Dashboard inline cards) ── -->
+    <Style x:Key="PumpCard" TargetType="Border">
+        <Setter Property="Background"      Value="{DynamicResource CardBackgroundFillColorDefaultBrush}"/>
+        <Setter Property="BorderBrush"     Value="{DynamicResource CardStrokeColorDefaultBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="CornerRadius"    Value="8"/>
+        <Setter Property="Padding"         Value="16"/>
+        <Setter Property="Margin"          Value="4"/>
+    </Style>
+
+    <Style x:Key="PumpCardHeader" TargetType="TextBlock">
+        <Setter Property="FontFamily"  Value="{DynamicResource ContentControlThemeFontFamily}"/>
+        <Setter Property="FontSize"    Value="14"/>
+        <Setter Property="FontWeight"  Value="SemiBold"/>
+        <Setter Property="Foreground"  Value="{DynamicResource TextFillColorPrimaryBrush}"/>
+        <Setter Property="Margin"      Value="0,0,0,10"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+    </Style>
+
+    <!-- Small label beneath a pump slider (parameter name, unit, range limit) -->
+    <Style x:Key="PumpCommandLabel" TargetType="TextBlock">
+        <Setter Property="FontFamily"          Value="{DynamicResource ContentControlThemeFontFamily}"/>
+        <Setter Property="FontSize"            Value="11"/>
+        <Setter Property="Foreground"          Value="{DynamicResource TextFillColorSecondaryBrush}"/>
+        <Setter Property="HorizontalAlignment" Value="Center"/>
+        <Setter Property="TextAlignment"       Value="Center"/>
+    </Style>
+
+    <!-- Current-value readout beneath a pump slider -->
+    <Style x:Key="PumpCommandValue" TargetType="TextBox">
+        <Setter Property="FontFamily"  Value="Consolas"/>
+        <Setter Property="FontSize"    Value="15"/>
+        <Setter Property="FontWeight"  Value="SemiBold"/>
+        <Setter Property="Foreground"  Value="{DynamicResource AccentTextFillColorPrimaryBrush}"/>
+        <Setter Property="Background"  Value="Transparent"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="TextAlignment"   Value="Center"/>
+        <Setter Property="Padding"         Value="4,2"/>
+        <Setter Property="Width"           Value="70"/>
+        <Setter Property="Height"          Value="30"/>
+    </Style>
+
+    <!-- Snackbar bottom-overlay shell -->
+    <Style x:Key="SnackbarShell" TargetType="Border">
+        <Setter Property="Background"      Value="{DynamicResource CardBackgroundFillColorDefaultBrush}"/>
+        <Setter Property="BorderBrush"     Value="{DynamicResource CardStrokeColorDefaultBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="CornerRadius"    Value="10"/>
+        <Setter Property="Padding"         Value="0"/>
+        <Setter Property="Effect">
+            <Setter.Value>
+                <DropShadowEffect Color="#000000" Opacity="0.18" BlurRadius="20" ShadowDepth="4"/>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
     <!-- ── Device row button — hover tint indicates intent (connect=blue, disconnect=red) -->
     <Style x:Key="DeviceRow" TargetType="Button">
         <Setter Property="Background" Value="{DynamicResource ControlFillColorSecondaryBrush}"/>