Distributed confirmation dialog: all GUIs open on WAIT_USER, server closes all

- Browser: OK button sends Confirm without closing dialog; Escape blocked;
  dialog closes when state leaves WAIT_USER (server-driven).
- PyQt: non-blocking QDialog replaces blocking QMessageBox; OK sends Confirm
  without closing; dialog closed by server state change or on disconnect.
- ws_client.py: remove deprecated loop= params from websockets.connect() and
  asyncio.ensure_future() (same fix already applied to ws_server.py) so the
  PyQt client can actually connect with websockets >= 10.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Tqxrk8uj4M3w3d3eXm3xK8

client/brewpi_gui.py

@@ -421,6 +421,7 @@ class Window(QtWidgets.QMainWindow, Ui_MainWindow):
 		self.sud_empty = True
 		self.sud_state = None
 		self.sud_user_message = None
+		self._confirm_box = None
 		# Mirrors the server's TempController.enabled - gates the
 		# temp/heatrate setpoint controls (see on_tempctrl_changed()).
 		self.tc_enabled = False
@@ -732,6 +733,7 @@ class Window(QtWidgets.QMainWindow, Ui_MainWindow):
 			self.sud_empty = True
 			self.sud_state = None
 			self.sud_user_message = None
+			self._close_confirm_dialog()
 			self.tc_enabled = False
 			self.checkbox_tc_enable.blockSignals(True)
 			self.checkbox_tc_enable.setChecked(False)
@@ -875,11 +877,23 @@ class Window(QtWidgets.QMainWindow, Ui_MainWindow):
 		self.msg_sud.send({'Stop': True})
 
 	def show_user_message(self, message):
-		# on_sud_changed() already runs on the GUI thread (via recv_signal),
-		# so this can show the dialog directly. The Sud is already blocked
-		# in WAIT_USER server-side; closing this dialog is what unblocks it.
-		QtWidgets.QMessageBox.information(self, "Sud", message)
-		self.msg_sud.send({'Confirm': True})
+		if self._confirm_box is not None:
+			return
+		dlg = QtWidgets.QDialog(self)
+		dlg.setWindowTitle("Sud")
+		dlg.setWindowModality(QtCore.Qt.NonModal)
+		layout = QtWidgets.QVBoxLayout(dlg)
+		layout.addWidget(QtWidgets.QLabel(message))
+		btn = QtWidgets.QPushButton("OK")
+		btn.clicked.connect(lambda: self.msg_sud.send({'Confirm': True}))
+		layout.addWidget(btn)
+		self._confirm_box = dlg
+		dlg.show()
+
+	def _close_confirm_dialog(self):
+		if self._confirm_box is not None:
+			self._confirm_box.close()
+			self._confirm_box = None
 
 	def on_action_sud_new(self):
 		# Sends an empty schedule via the same Load path Load Sud uses, with
@@ -1088,6 +1102,8 @@ class Window(QtWidgets.QMainWindow, Ui_MainWindow):
 
 				if self.sud_state == SUD_WAIT_USER_STATE and prev_state != SUD_WAIT_USER_STATE and self.sud_user_message:
 					self.show_user_message(self.sud_user_message)
+				elif prev_state == SUD_WAIT_USER_STATE and self.sud_state != SUD_WAIT_USER_STATE:
+					self._close_confirm_dialog()
 				self._update_step_plates()
 			elif "UserMessage" in key:
 				self.sud_user_message = msg['UserMessage']