feat: redesign dashboard with Fluent KPI tiles, connection strip, and devices column

- Replace LCD-style readings with a 3×2 KPI tile grid (Fluent card surfaces, 52pt values)
- Add persistent top connection strip with horizontal chips + pump name badge
- Add elapsed test timer (DispatcherTimer, mm:ss) to Test Summary card
- Restyle Test Summary and Active Alarms with Fluent brushes/iconography
- Add Devices column (CAN / K-Line / Bench tiles) between KPI grid and test/alarms
  - Enumerates attached PCAN USB channels via PCAN_ATTACHED_CHANNELS API
  - Enumerates FTDI K-Line adapters via existing FtdiInterface helpers
  - Click to connect/disconnect; confirmation dialog when session active or test running
  - Hover tint: blue = will connect, red = will disconnect; Bench row is read-only stub
- Extend ICanService with SelectedChannel + EnumerateAttachedChannels()
- Expose IKwpService.ConnectedPort for active session device tracking
- Add DeviceRow button style with MultiDataTrigger hover colour logic
- Add 30+ new localization keys (ES + EN) for KPI labels, devices, confirmations

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

ViewModels/Pages/PumpPageViewModel.cs

@@ -42,9 +42,6 @@ namespace HC_APTBS.ViewModels.Pages
         /// <summary>Diagnostic Trouble Code list (§3.b).</summary>
         public DtcListViewModel DtcList { get; }
 
-        /// <summary>Adaptation sub-section auth gate (§3.d).</summary>
-        public AuthGateViewModel AdaptationAuth { get; }
-
         /// <summary>DFI management (§3.d).</summary>
         public DfiManageViewModel DfiViewModel => Root.DfiViewModel;
 
@@ -82,12 +79,10 @@ namespace HC_APTBS.ViewModels.Pages
         /// <summary>Constructs the page VM and subscribes to relevant Root state changes.</summary>
         public PumpPageViewModel(
             MainViewModel root,
-            DtcListViewModel dtcList,
-            AuthGateViewModel adaptationAuth)
+            DtcListViewModel dtcList)
         {
-            Root            = root;
-            DtcList         = dtcList;
-            AdaptationAuth  = adaptationAuth;
+            Root   = root;
+            DtcList = dtcList;
 
             // Initialise derived flags from the current Root state.
             RefreshDerivedFlags();
@@ -120,11 +115,6 @@ namespace HC_APTBS.ViewModels.Pages
             IsUnlockApplicable    = Root.CurrentPump != null && Root.CurrentPump.UnlockType != 0;
             OnPropertyChanged(nameof(UnlockVm));
 
-            // When the pump changes, re-lock the adaptation gate — a new operator
-            // may be handling a different pump.
-            if (AdaptationAuth.IsAuthenticated)
-                AdaptationAuth.LockCommand.Execute(null);
-
             // Drop any stale DTCs from the previous pump.
             DtcList.Reset();
         }