fix: mqtt subscription format

- Updated subscribe calls to match gmqtt example
- Added qos=1 parameter to subscriptions

backend/mqtt_integration.py

@@ -3,7 +3,6 @@ import json
 import asyncio
 from typing import Optional, Callable, Union
 from gmqtt import Client as MQTTClient
-from gmqtt.mqtt.subscription import Subscription
 import logging
 
 # Get logger
@@ -103,9 +102,8 @@ class HomeAssistantMQTT:
         logger.info("Connected to MQTT broker")
         self._connected = True
         try:
-            # Subscribe to command topic using gmqtt's format
-            sub = Subscription(self.command_topic, qos=1)
-            await self.client.subscribe([sub])
+            # Subscribe to command topic
+            await self.client.subscribe(self.command_topic, qos=1)
             logger.info(f"Subscribed to command topic: {self.command_topic}")
             
             # Publish discovery config
@@ -194,8 +192,7 @@ class HomeAssistantMQTT:
         """Subscribe to a topic"""
         if self.client and self._connected:
             try:
-                sub = Subscription(topic, qos=1)
-                await self.client.subscribe([sub])
+                await self.client.subscribe(topic, qos=1)
             except Exception as e:
                 logger.error(f"Failed to subscribe to topic: {e}")