Server closes connections gracefully so kick/ban/reset/shutdown messages arrive; status dot and HUD yellow until really connected (also while reconnecting)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Tests/Program.cs

@@ -155,6 +155,20 @@ try
     watcher.Close();
     await Task.Delay(300);
 
+    Console.WriteLine("== Kick reason arrives while the player keeps sending");
+    var spammer = await TestClient.Join("Spammer", 0, null);
+    var spamming = true;
+    var spamTask = Task.Run(async () => { while (spamming) { spammer.Send(MsgType.Player, PlayerPos(1f, 2f, 3f)); await Task.Delay(5); } });
+    await Task.Delay(300);
+    server.EnqueueCommand("kick " + spammer.Id + " testing");
+    var kickMsg = await spammer.WaitFor(MsgType.Reject, 3000);
+    spamming = false;
+    await spamTask;
+    Check(kickMsg != null && new BinaryReader(new MemoryStream(kickMsg)).ReadString().Contains("testing"),
+          "Kicked player receives the reason even while sending data (no hard reset)");
+    spammer.Close();
+    await Task.Delay(300);
+
     Console.WriteLine("== reset-world makes everyone reconnect");
     var r1 = await TestClient.Join("Resetter", 0, null);
     server.EnqueueCommand("reset-world");