feat: redesign Bench page with Fluent card layout and radial advance monitor

Three-column layout replacing the old HMI grid:
- BenchRpmCommandCard: inline numeric input, 2×4 preset grid, Start/Stop
- BenchActuatorsCard: direction toggle, oil pump, temperature PID, misc relays
  with FluentStateToggle showing checked state via AccentFillColor
- BenchLiveDataCard: 2×5 KPI tiles (RPM, P1, P2, Q-Delivery, Q-Over, temps)
- BenchChartsCard: 2×2 compact chart grid (Delivery, Over, P1, P2)
- AdvanceMonitorCard: RadialAngleGauge custom FrameworkElement + PSG/INJ readouts,
  Δ° lock offset input, Zero PSG / Zero INJ buttons

Supporting changes:
- AngleDisplayViewModel: promote _currentManualDegrees, _isLockSet to
  [ObservableProperty]; add PsgRelativeDegrees, InjEncoderDegreesValue,
  TargetLockAngle, IsRunningMode (29/31 hysteresis); computed PrimaryGaugeAngle,
  TargetAngleForGauge, SecondaryGaugeAngle
- BenchControlViewModel: add IsDirectionLeft computed property,
  SetDirectionRightCommand, SetDirectionLeftCommand, ApplyRpmCommand
- FlowmeterChartView: add IsCompact DP (false default) for 90px compact height
- Styles.xaml: add IsChecked trigger to FluentStateToggle (accent fill + white text)
- Strings.en/es.xaml: add all new card and actuator string keys

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

ViewModels/AngleDisplayViewModel.cs

@@ -31,10 +31,15 @@ namespace HC_APTBS.ViewModels
         private double _zeroPsgEncoder;
         private double _zeroInjDegrees;
         private double _injEncoderDegrees;
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(PrimaryGaugeAngle))]
+        [NotifyPropertyChangedFor(nameof(SecondaryGaugeAngle))]
         private double _currentManualDegrees;
         private double _lockAngleValue;
-        private bool   _isLockSet;
-        private bool   _isManualVisible;
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(TargetAngleForGauge))]
+        private bool _isLockSet;
+        private bool _isManualVisible;
 
         // ── Observable properties (bound by View) ─────────────────────────────────
 
@@ -68,6 +73,27 @@ namespace HC_APTBS.ViewModels
         /// <summary>Foreground brush for the lock angle display (Green/Red/White).</summary>
         [ObservableProperty] private Brush _lockAngleForeground = Brushes.White;
 
+        // ── Numeric doubles for radial advance-monitor control ────────────────────
+
+        /// <summary>PSG relative angle as a double for gauge binding.</summary>
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(PrimaryGaugeAngle))]
+        private double _psgRelativeDegrees;
+
+        /// <summary>INJ encoder absolute degrees (0–360) as a double.</summary>
+        [ObservableProperty] private double _injEncoderDegreesValue;
+
+        /// <summary>Lock angle target (0–360 degrees) as a double for gauge binding.</summary>
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(TargetAngleForGauge))]
+        private double _targetLockAngle;
+
+        /// <summary>True when bench RPM ≥ 31, hysteresis-cleared below 29.</summary>
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(PrimaryGaugeAngle))]
+        [NotifyPropertyChangedFor(nameof(SecondaryGaugeAngle))]
+        private bool _isRunningMode;
+
         // ── Constructor ───────────────────────────────────────────────────────────
 
         /// <summary>
@@ -78,6 +104,17 @@ namespace HC_APTBS.ViewModels
             _encoderResolution = configService.Settings.EncoderResolution;
         }
 
+        // ── Computed for radial gauge ─────────────────────────────────────────────
+
+        /// <summary>Primary thumb angle: manual-wheel angle in hand-mode, PSG relative angle when running.</summary>
+        public double PrimaryGaugeAngle => IsRunningMode ? PsgRelativeDegrees : CurrentManualDegrees;
+
+        /// <summary>Target thumb angle for the radial gauge, or null when no lock has been set yet.</summary>
+        public double? TargetAngleForGauge => IsLockSet ? TargetLockAngle : (double?)null;
+
+        /// <summary>Ghost secondary thumb angle: manual-wheel position shown when running, null in hand-mode (primary already shows it).</summary>
+        public double? SecondaryGaugeAngle => IsRunningMode ? CurrentManualDegrees : (double?)null;
+
         // ── Public update (called from MainViewModel.OnRefreshTick) ───────────────
 
         /// <summary>
@@ -98,6 +135,11 @@ namespace HC_APTBS.ViewModels
             _currentRpm      = rpm;
             _isDirectionRight = isDirectionRight;
 
+            if (!IsRunningMode && rpm >= 31.0)
+                IsRunningMode = true;
+            else if (IsRunningMode && rpm < 29.0)
+                IsRunningMode = false;
+
             RecalculatePsg();
             RecalculateInj();
             RecalculateManual();
@@ -150,7 +192,8 @@ namespace HC_APTBS.ViewModels
             if (double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out double delta))
             {
                 _lockAngleValue = CalculateLockAngle(delta);
-                _isLockSet = true;
+                TargetLockAngle = _lockAngleValue;
+                IsLockSet = true;
                 LockAngleDisplay = FormatAngle(_lockAngleValue);
             }
 
@@ -183,8 +226,9 @@ namespace HC_APTBS.ViewModels
             if (relDeg > 180) relDeg = 360 - relDeg;
             relDeg *= sign;
 
-            PsgEncoderAngle  = FormatAngle(rawDeg);
-            PsgRelativeAngle = FormatAngle(relDeg);
+            PsgRelativeDegrees = relDeg;
+            PsgEncoderAngle    = FormatAngle(rawDeg);
+            PsgRelativeAngle   = FormatAngle(relDeg);
         }
 
         private void RecalculateInj()
@@ -202,7 +246,8 @@ namespace HC_APTBS.ViewModels
             double sign = DirectionSign;
 
             // INJ encoder → degrees (full 0–360, NO 180 normalization).
-            _injEncoderDegrees = _injRaw * (360.0 / _encoderResolution);
+            _injEncoderDegrees     = _injRaw * (360.0 / _encoderResolution);
+            InjEncoderDegreesValue = _injEncoderDegrees;
 
             // Relative angle from zero reference.
             double relDeg = (_injEncoderDegrees - _zeroInjDegrees) * sign;
@@ -216,13 +261,14 @@ namespace HC_APTBS.ViewModels
                                 CultureInfo.InvariantCulture, out double delta))
             {
                 _lockAngleValue = CalculateLockAngle(delta);
+                TargetLockAngle = _lockAngleValue;
                 LockAngleDisplay = FormatAngle(_lockAngleValue);
             }
         }
 
         private void RecalculateManual()
         {
-            _currentManualDegrees = _manualRaw * (360.0 / _encoderResolution);
+            CurrentManualDegrees = _manualRaw * (360.0 / _encoderResolution);
 
             if (_currentRpm < 30)
             {

ViewModels/BenchControlViewModel.cs

@@ -22,7 +22,12 @@ namespace HC_APTBS.ViewModels
         // ── Direction ─────────────────────────────────────────────────────────────
 
         /// <summary>True when the bench rotates clockwise (right). False for counter-clockwise (left).</summary>
-        [ObservableProperty] private bool _isDirectionRight = true;
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(IsDirectionLeft))]
+        private bool _isDirectionRight = true;
+
+        /// <summary>True when the bench rotates counter-clockwise (left). Computed inverse of <see cref="IsDirectionRight"/>.</summary>
+        public bool IsDirectionLeft => !IsDirectionRight;
 
         // ── Oil pump ──────────────────────────────────────────────────────────────
 
@@ -85,6 +90,14 @@ namespace HC_APTBS.ViewModels
             _bench.SetRelay(RelayNames.DirectionLeft, !value);
         }
 
+        /// <summary>Sets the bench rotation direction to clockwise (right).</summary>
+        [RelayCommand]
+        private void SetDirectionRight() => IsDirectionRight = true;
+
+        /// <summary>Sets the bench rotation direction to counter-clockwise (left).</summary>
+        [RelayCommand]
+        private void SetDirectionLeft() => IsDirectionRight = false;
+
         // ── Oil pump toggle ───────────────────────────────────────────────────────
 
         partial void OnIsOilPumpOnChanged(bool value)
@@ -167,6 +180,13 @@ namespace HC_APTBS.ViewModels
             IsBenchRunning = false;
         }
 
+        /// <summary>
+        /// Applies the RPM value from <see cref="RpmInputText"/> and starts the bench.
+        /// Bound to the inline Apply button in <c>BenchRpmCommandCard</c>.
+        /// </summary>
+        [RelayCommand]
+        private void ApplyRpm() => StartBench();
+
         /// <summary>
         /// Quick-select button handler: sets the RPM input and starts the bench.
         /// </summary>