fix: Reconnect MQTT client automatically on MqttError

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

main.py

@@ -10,6 +10,7 @@ import json
 
 import asyncio
 from aiomqtt import Client
+from aiomqtt.exceptions import MqttError
 from dbus_next.aio import MessageBus
 from dbus_next.service import ServiceInterface, method
 from dbus_next.constants import BusType
@@ -311,14 +312,20 @@ async def process_mqtt(message):
 async def fetch_mqtt():
     await asyncio.sleep(3)
 
+    while True:
+        try:
             async with Client(
                 hostname='10.55.0.106',
                 port=1883,
             ) as client:
+                logging.info("MQTT client connected")
                 await client.subscribe('iot/12ser/#')
                 async for message in client.messages:
                     loop = asyncio.get_event_loop()
                     loop.create_task(process_mqtt(message))
+        except MqttError as e:
+            logging.warning(f"MQTT connection error: {e}. Reconnecting in 5 seconds...")
+            await asyncio.sleep(5)
 
 
 def suppress_hfp_rejection_error(loop, context):