Add call recording integration

tests/SwyxTray.RecordingChecks/TransportStubs.cs

@@ -0,0 +1,17 @@
+// Only the COM executor and browser-plugin channel are replaced. The outbox,
+// session, framing, cancellation and persistence are production code.
+using SwyxTray.Recording;
+using SwyxTray.Swyx;
+namespace SwyxTray.Web;
+internal sealed class CommandExecutor(RecordingOutbox outbox)
+{
+    public RecordingOutbox Outbox => outbox;
+    public Task<SwyxSnapshot> GetSnapshotAsync(CancellationToken _) => Task.FromResult(SwyxSnapshot.Offline);
+    public Task<IReadOnlyList<SwyxContact>> GetAddressesAsync(CancellationToken _) => Task.FromResult<IReadOnlyList<SwyxContact>>([]);
+    public Task<ResultMessage> ExecuteAsync(ClientCommand command, CancellationToken _)
+    {
+        if (command.Cmd == "recording.ack") Outbox.Acknowledge(command.RecordingId!.Value, command.JobId);
+        return Task.FromResult(new ResultMessage(command.Id, true));
+    }
+}
+internal sealed class PluginTabChannel { public bool TryComplete(ClientCommand _) => false; }