修复 AppState 审计第一/第二阶段问题：功能阻塞与事件/内存压力

- BGA 检测：流水线复用失败时删除无条件 return 死代码，回退到真实检测路径（原有仿真数据兜底不变）
- MotionState 去重改用值比较（record Equals），避免设备静止时 100ms 轮询仍每次触发全量 UI 更新
- DetectorFramePipelineService 移除只写不读的 _acquireQueue，改为原子饱和计数器，不再让约 37MB/帧的图像常驻内存
- PerformanceMonitorViewModel 订阅事件改为具名处理器，Dispose 时完整反订阅，避免调试面板重复开关造成泄漏

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

XplorePlane/Services/AppState/AppStateService.cs

@@ -790,7 +790,7 @@ namespace XplorePlane.Services.AppState
         private void SetMotionState(MotionState newState)
         {
             var old = Interlocked.Exchange(ref _motionState, newState);
-            if (ReferenceEquals(old, newState)) return;
+            if (old == newState) return;
             RaiseOnDispatcher(old, newState, MotionStateChanged, nameof(MotionState));
         }
     }

XplorePlane/Services/Main/Viewport/DetectorFramePipelineService.cs

@@ -26,7 +26,6 @@ namespace XplorePlane.Services.Main.Viewport
 
     public sealed class DetectorFramePipelineService : IDetectorFramePipelineService
     {
-        private readonly ConcurrentQueue<DetectorFrame> _acquireQueue = new();
         private readonly ConcurrentQueue<DetectorFrame> _processQueue = new();
         private readonly SemaphoreSlim _processSignal = new(0);
         private readonly CancellationTokenSource _shutdown = new();
@@ -110,7 +109,8 @@ namespace XplorePlane.Services.Main.Viewport
                     rawPixels: rawPixels,
                     previewImage: bitmap);
 
-                EnqueueBounded(_acquireQueue, frame, AcquireQueueCapacity, ref _acquireQueueCount);
+                // 仅维护饱和计数用于诊断展示，不持有帧对象本身，避免大尺寸帧在无消费者的情况下常驻内存。
+                IncrementSaturating(ref _acquireQueueCount, AcquireQueueCapacity);
                 _mainViewportService.UpdateDetectorFrame(frame);
 
                 var sequence = Interlocked.Increment(ref _receivedFrameCount);
@@ -168,6 +168,18 @@ namespace XplorePlane.Services.Main.Viewport
             }
         }
 
+        /// <summary>递增计数并夹到容量上限，用于无实际队列时的诊断计数。</summary>
+        private static void IncrementSaturating(ref int count, int capacity)
+        {
+            int current, next;
+            do
+            {
+                current = Volatile.Read(ref count);
+                next = Math.Min(current + 1, capacity);
+            }
+            while (Interlocked.CompareExchange(ref count, next, current) != current);
+        }
+
         private static int ReadInt(string key, int defaultValue, int minValue)
         {
             var raw = ConfigurationManager.AppSettings[key];

XplorePlane/ViewModels/Debug/PerformanceMonitorViewModel.cs

@@ -81,19 +81,27 @@ namespace XplorePlane.ViewModels.Debug
                 return;
             }
 
-            _appStateService.MotionStateChanged += (_, _) => RecordEvent("MotionState");
-            _appStateService.RaySourceStateChanged += (_, _) => RecordEvent("RaySourceState");
-            _appStateService.DetectorStateChanged += (_, _) => RecordEvent("DetectorState");
-            _appStateService.SystemStateChanged += (_, _) => RecordEvent("SystemState");
-            _appStateService.CameraStateChanged += (_, _) => RecordEvent("CameraState");
-            _appStateService.LinkedViewStateChanged += (_, _) => RecordEvent("LinkedViewState");
-            _appStateService.RecipeExecutionStateChanged += (_, _) => RecordEvent("RecipeExecutionState");
+            _appStateService.MotionStateChanged += OnMotionStateChanged;
+            _appStateService.RaySourceStateChanged += OnRaySourceStateChanged;
+            _appStateService.DetectorStateChanged += OnDetectorStateChanged;
+            _appStateService.SystemStateChanged += OnSystemStateChanged;
+            _appStateService.CameraStateChanged += OnCameraStateChanged;
+            _appStateService.LinkedViewStateChanged += OnLinkedViewStateChanged;
+            _appStateService.RecipeExecutionStateChanged += OnRecipeExecutionStateChanged;
 
             _timer.Start();
             _initialized = true;
         }
 
-        /// <summary>释放资源：停止定时器 + 清空数据</summary>
+        private void OnMotionStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Main.MotionState> e) => RecordEvent("MotionState");
+        private void OnRaySourceStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Main.RaySourceState> e) => RecordEvent("RaySourceState");
+        private void OnDetectorStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Main.DetectorState> e) => RecordEvent("DetectorState");
+        private void OnSystemStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Main.SystemState> e) => RecordEvent("SystemState");
+        private void OnCameraStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Main.CameraState> e) => RecordEvent("CameraState");
+        private void OnLinkedViewStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Main.LinkedViewState> e) => RecordEvent("LinkedViewState");
+        private void OnRecipeExecutionStateChanged(object sender, StateChangedEventArgs<XplorePlane.Models.Recipe.RecipeExecutionState> e) => RecordEvent("RecipeExecutionState");
+
+        /// <summary>释放资源：反订阅状态事件 + 停止定时器 + 清空数据</summary>
         public void Dispose()
         {
             if (_disposed)
@@ -101,6 +109,17 @@ namespace XplorePlane.ViewModels.Debug
                 return;
             }
 
+            if (_initialized)
+            {
+                _appStateService.MotionStateChanged -= OnMotionStateChanged;
+                _appStateService.RaySourceStateChanged -= OnRaySourceStateChanged;
+                _appStateService.DetectorStateChanged -= OnDetectorStateChanged;
+                _appStateService.SystemStateChanged -= OnSystemStateChanged;
+                _appStateService.CameraStateChanged -= OnCameraStateChanged;
+                _appStateService.LinkedViewStateChanged -= OnLinkedViewStateChanged;
+                _appStateService.RecipeExecutionStateChanged -= OnRecipeExecutionStateChanged;
+            }
+
             _timer.Stop();
             Metrics.Clear();
             TrendData.Clear();

XplorePlane/ViewModels/Inspection/TaskWizard/InspectionTaskWizardViewModel.cs

@@ -634,12 +634,11 @@ namespace XplorePlane.ViewModels.Inspection.TaskWizard
             }
 
             _logger.LogWarning(
-                "[BGA-Pipeline] 未找到流水线 BgaVoidRate 输出，operator={Operator}, keys={Keys}",
+                "[BGA-Pipeline] 未找到流水线 BgaVoidRate 输出，operator={Operator}, keys={Keys}，回退到真实检测路径",
                 _viewportService?.LatestPipelineOperatorKey ?? string.Empty,
                 _viewportService?.LatestPipelineOutputData == null
                     ? "none"
                     : string.Join(",", _viewportService.LatestPipelineOutputData.Keys));
-            return;
 
             _logger.LogInformation("▶ ExecuteRunBgaDetection 开始");