Add adversarial L4 court chamber with Seer court_debate feed.

Prosecutor and Public Defender use real fleet telemetry only; Judge dispatches L4 commands and emits full transcripts via seer_events and emberwake_court_debate when ai_control_enabled.

server/internal/api/websocket_test.go

@@ -39,6 +39,27 @@ func wsDashboardToken(user, pass string) string {
 	return base64.StdEncoding.EncodeToString([]byte(user + ":" + pass))
 }
 
+func connectTestDashboard(t *testing.T, hub *WSHub) *websocket.Conn {
+	t.Helper()
+	resetWSAuthUsers(t, testAuthUser, testAuthPass)
+	srv := httptest.NewServer(http.HandlerFunc(hub.HandleDashboardWS))
+	t.Cleanup(srv.Close)
+	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "?token=" + wsDashboardToken(testAuthUser, testAuthPass)
+	conn, _, err := websocket.DefaultDialer.Dial(wsURL, nil)
+	if err != nil {
+		t.Fatalf("dial dashboard: %v", err)
+	}
+	t.Cleanup(func() { _ = conn.Close() })
+	var init Message
+	if err := conn.ReadJSON(&init); err != nil {
+		t.Fatalf("read init: %v", err)
+	}
+	if init.Type != "init" {
+		t.Fatalf("expected init, got %q", init.Type)
+	}
+	return conn
+}
+
 func dialAgentWS(t *testing.T, hub *WSHub) (*websocket.Conn, string) {
 	t.Helper()
 	srv := httptest.NewServer(http.HandlerFunc(hub.HandleAgentWS))