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>

ViewModels/Pages/PumpPageViewModel.cs

@@ -1,33 +1,19 @@
 using System.ComponentModel;
+using System.Windows;
 using CommunityToolkit.Mvvm.ComponentModel;
 using HC_APTBS.Models;
 using HC_APTBS.ViewModels.Dialogs;
+using SkiaSharp;
 
 namespace HC_APTBS.ViewModels.Pages
 {
-    /// <summary>Identifies the sub-section shown inside the Pump navigation page.</summary>
-    public enum PumpSubPage
-    {
-        /// <summary>§3.a — Pump selection and K-Line ECU read.</summary>
-        Identification = 0,
-        /// <summary>§3.b — Diagnostic Trouble Codes.</summary>
-        Dtcs           = 1,
-        /// <summary>§3.c — Live pump CAN readings and status words.</summary>
-        LiveData       = 2,
-        /// <summary>§3.d — DFI calibration and ME/FBKW/PreIn manual control (auth-gated).</summary>
-        Adaptation     = 3,
-        /// <summary>§3.e — Ford VP44 immobilizer unlock (visible only when required).</summary>
-        Unlock         = 4
-    }
-
     /// <summary>
     /// ViewModel for the Pump navigation page.
     ///
     /// <para>Thin façade that groups the pump-related child ViewModels owned by
-    /// <see cref="MainViewModel"/> and adds sub-page navigation, banner flags,
-    /// and the Adaptation auth gate. Holds a <see cref="Root"/> reference so
-    /// page XAML can bind to MainViewModel-owned properties (PumpRpm, PumpTemp,
-    /// KLineState, …) via <c>{Binding Root.X}</c>.</para>
+    /// <see cref="MainViewModel"/> and adds banner flags. Holds a <see cref="Root"/>
+    /// reference so page XAML can bind to MainViewModel-owned properties (PumpRpm,
+    /// PumpTemp, KLineState, …) via <c>{Binding Root.X}</c>.</para>
     /// </summary>
     public sealed partial class PumpPageViewModel : ObservableObject
     {
@@ -36,31 +22,29 @@ namespace HC_APTBS.ViewModels.Pages
 
         // ── Child VM façades ──────────────────────────────────────────────────────
 
-        /// <summary>Pump selector and K-Line read (§3.a).</summary>
+        /// <summary>Pump selector and K-Line read.</summary>
         public PumpIdentificationViewModel Identification => Root.PumpIdentification;
 
-        /// <summary>Diagnostic Trouble Code list (§3.b).</summary>
+        /// <summary>Diagnostic Trouble Code list.</summary>
         public DtcListViewModel DtcList { get; }
 
-        /// <summary>DFI management (§3.d).</summary>
+        /// <summary>DFI management.</summary>
         public DfiManageViewModel DfiViewModel => Root.DfiViewModel;
 
-        /// <summary>Manual pump control sliders (§3.d).</summary>
+        /// <summary>Manual pump control sliders.</summary>
         public PumpControlViewModel PumpControl => Root.PumpControl;
 
-        /// <summary>First pump status display — Status word (§3.c).</summary>
+        /// <summary>First pump status display — Status word.</summary>
         public StatusDisplayViewModel StatusDisplay1 => Root.StatusDisplay1;
 
-        /// <summary>Second pump status display — Empf3 word (§3.c).</summary>
+        /// <summary>Second pump status display — Empf3 word.</summary>
         public StatusDisplayViewModel StatusDisplay2 => Root.StatusDisplay2;
 
-        /// <summary>Current immobilizer unlock VM (§3.e). Null when no unlock is in progress for this pump.</summary>
+        /// <summary>Current immobilizer unlock VM. Null when no unlock is in progress.</summary>
         public UnlockProgressViewModel? UnlockVm => Root.CurrentUnlockVm;
 
-        // ── Navigation state ──────────────────────────────────────────────────────
-
-        /// <summary>Currently selected Pump sub-section.</summary>
-        [ObservableProperty] private PumpSubPage _selectedSubPage = PumpSubPage.Identification;
+        /// <summary>Real-time RPM chart (120-sample rolling window).</summary>
+        public SingleFlowChartViewModel RpmChart { get; }
 
         // ── Banner flags (derived from Root state) ────────────────────────────────
 
@@ -81,13 +65,12 @@ namespace HC_APTBS.ViewModels.Pages
             MainViewModel root,
             DtcListViewModel dtcList)
         {
-            Root   = root;
+            Root    = root;
             DtcList = dtcList;
+            RpmChart = new SingleFlowChartViewModel("RPM", new SKColor(0x21, 0x96, 0xF3), maxSamples: 120);
 
-            // Initialise derived flags from the current Root state.
             RefreshDerivedFlags();
 
-            // Keep the derived flags in sync with Root changes.
             Root.PropertyChanged += OnRootPropertyChanged;
             Root.PumpIdentification.PumpChanged += _ => RefreshDerivedFlags();
         }
@@ -104,19 +87,23 @@ namespace HC_APTBS.ViewModels.Pages
                 case nameof(MainViewModel.CurrentUnlockVm):
                     OnPropertyChanged(nameof(UnlockVm));
                     break;
+
+                case nameof(MainViewModel.PumpRpm):
+                    Application.Current.Dispatcher.Invoke(() => RpmChart.AddValue(Root.PumpRpm));
+                    break;
             }
         }
 
         private void RefreshDerivedFlags()
         {
-            IsPumpSelected        = Root.CurrentPump != null;
-            IsKLineSessionOpen    = Root.KLineState == KLineConnectionState.Connected;
-            IsKLineSessionFailed  = Root.KLineState == KLineConnectionState.Failed;
-            IsUnlockApplicable    = Root.CurrentPump != null && Root.CurrentPump.UnlockType != 0;
+            IsPumpSelected       = Root.CurrentPump != null;
+            IsKLineSessionOpen   = Root.KLineState == KLineConnectionState.Connected;
+            IsKLineSessionFailed = Root.KLineState == KLineConnectionState.Failed;
+            IsUnlockApplicable   = Root.CurrentPump != null && Root.CurrentPump.UnlockType != 0;
             OnPropertyChanged(nameof(UnlockVm));
 
-            // Drop any stale DTCs from the previous pump.
             DtcList.Reset();
+            RpmChart.Clear();
         }
     }
 }