TASK 4 ship step 5.5: social bar bug fixes + bar on the live output — direction-snap drag (SocialBarSnap.Decide + ClearValue, local Canvas.Top was overriding the binding), fediverse nodeinfo subdomain probing + load-time heal (settable FediverseSoftware), SocialBarRenderer strip blitted above the flash via a re-read FramePump socialBar seam — 155 tests passing, 0 warnings

Services/Encoder/FramePump.cs

@@ -28,6 +28,7 @@ public sealed class FramePump : IDisposable
     private readonly Func<IFfmpegEncoder> _encoderFactory;
     private readonly Action<string>? _log;
     private readonly Func<TimeSpan, CancellationToken, Task> _pacingDelay;
+    private readonly Func<(VideoFrame? Frame, SocialBarPosition Position)>? _socialBar;
     private readonly SceneCompositor _compositor = new();
 
     private readonly object _gate = new();
@@ -49,7 +50,8 @@ public sealed class FramePump : IDisposable
         Func<EncoderOptions?> encoderOptions,
         Func<IFfmpegEncoder> encoderFactory,
         Action<string>? log = null,
-        Func<TimeSpan, CancellationToken, Task>? pacingDelay = null)
+        Func<TimeSpan, CancellationToken, Task>? pacingDelay = null,
+        Func<(VideoFrame? Frame, SocialBarPosition Position)>? socialBar = null)
     {
         _sceneProvider = sceneProvider ?? throw new ArgumentNullException(nameof(sceneProvider));
         _frameResolver = frameResolver ?? throw new ArgumentNullException(nameof(frameResolver));
@@ -58,6 +60,7 @@ public sealed class FramePump : IDisposable
         _encoderFactory = encoderFactory ?? throw new ArgumentNullException(nameof(encoderFactory));
         _log = log;
         _pacingDelay = pacingDelay ?? ((delay, ct) => Task.Delay(delay, ct));
+        _socialBar = socialBar;
     }
 
     public bool IsRunning { get; private set; }
@@ -212,7 +215,20 @@ public sealed class FramePump : IDisposable
                 var scene = _sceneProvider();
                 if (scene != null)
                 {
-                    var frame = _compositor.Render(scene, _frameResolver, null, _compositorOptions());
+                    var compositorOptions = _compositorOptions();
+                    VideoFrame? socialBarFrame = null;
+                    var socialBarTop = 0;
+                    if (_socialBar != null)
+                    {
+                        var (barFrame, position) = _socialBar();
+                        socialBarFrame = barFrame;
+                        if (barFrame != null)
+                            socialBarTop = position == SocialBarPosition.Top
+                                ? 0
+                                : compositorOptions.SourceRectHeight - barFrame.Height;
+                    }
+                    var frame = _compositor.Render(
+                        scene, _frameResolver, null, compositorOptions, socialBarFrame, socialBarTop);
                     IFfmpegEncoder? encoder;
                     lock (_gate) encoder = _encoder;
                     if (encoder == null) break; // _encoder is only cleared after the loop ends; defensive