TASK 4 ship step 6: health stats land in the bottom bar — FramePump.HealthUpdated is now wired to the VM (OnFramePumpHealthUpdated marshals onto the UI thread — the encoder's stderr loop raises on a background thread — and copies the parsed bitrate/FPS/dropped/duration into CurrentHealth, the bottom bar's existing binding); ResetHealth zeroes dropped frames + elapsed duration on go-live and on End so stats never linger from a previous session (bitrate/FPS stay on the tier's targets); the bar shows real encoder values once TASK 5 fills _rtmpUrlProvider (until then the pump skips the encoder) — 169 tests passing, 0 warnings

ViewModels/MainViewModel.cs

@@ -1078,6 +1078,7 @@ public class MainViewModel : ViewModelBase
             log: message => AppLog.Write(message),
             socialBar: () => (_socialBarFrame, _socials?.BarPosition ?? SocialBarPosition.Bottom));
         _framePump.Failed += OnFramePumpFailed;
+        _framePump.HealthUpdated += OnFramePumpHealthUpdated;
 
         LoadLayout();
         _ = LoadSavedSessionAsync();
@@ -1965,6 +1966,7 @@ public class MainViewModel : ViewModelBase
                 ? "ytLlive"
                 : $"{dialog.StreamTitle} — ytLlive";
             StreamStatus = StreamStatus.Streaming;
+            ResetHealth(StreamStatus.Streaming);
             _ = _framePump.StartAsync(); // never throws; failures log + surface via Failed
         }
     }
@@ -1973,6 +1975,7 @@ public class MainViewModel : ViewModelBase
     {
         StreamStatus = StreamStatus.Offline;
         WindowTitle = "ytLlive";
+        ResetHealth(StreamStatus.Offline);
         // Audio capture is always-on (preview monitoring); only the frame pump
         // and the session stop here.
         _ = _framePump.StopAsync();
@@ -2114,6 +2117,42 @@ public class MainViewModel : ViewModelBase
         if (IsLive) StreamStatus = StreamStatus.Error;
     }
 
+    // TASK 4 ship step 6: the encoder's parsed health (bitrate/FPS/dropped/
+    // duration) lands in the bottom bar. The stderr loop raises on a background
+    // thread — marshal to the UI thread like the audio level handlers.
+    private void OnFramePumpHealthUpdated(object? sender, StreamHealth health)
+    {
+        var dispatcher = System.Windows.Application.Current?.Dispatcher;
+        if (dispatcher != null && !dispatcher.CheckAccess())
+            dispatcher.BeginInvoke(() => ApplyHealth(health));
+        else
+            ApplyHealth(health);
+    }
+
+    private void ApplyHealth(StreamHealth health)
+    {
+        CurrentHealth.Status = health.Status;
+        CurrentHealth.CurrentBitrate = health.CurrentBitrate;
+        CurrentHealth.FPS = health.FPS;
+        CurrentHealth.DroppedFrames = health.DroppedFrames;
+        CurrentHealth.StreamDuration = health.StreamDuration;
+        CurrentHealth.LastError = health.LastError;
+        CurrentHealth.HealthMessage = health.HealthMessage;
+        OnPropertyChanged(nameof(CurrentHealth));
+    }
+
+    // Keeps the bottom-bar stats honest across sessions: dropped frames and the
+    // elapsed duration must not linger from a previous go-live (bitrate/FPS stay
+    // on the tier's targets — ApplyStreamQuality sets them on pick).
+    private void ResetHealth(StreamStatus status)
+    {
+        CurrentHealth.Status = status;
+        CurrentHealth.DroppedFrames = 0;
+        CurrentHealth.StreamDuration = TimeSpan.Zero;
+        CurrentHealth.LastError = null;
+        OnPropertyChanged(nameof(CurrentHealth));
+    }
+
     private void UpdateLiveVisuals()
     {
         var live = IsLive;