feat: Add MQTT command "kick" to disconnect connected device

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

main.py

@@ -180,6 +180,31 @@ async def enable_pairing():
     except Exception as e:
         logging.error(f"Failed to manage pairing state: {e}")
 
+
+async def disconnect_connected_device():
+    logging.info("Attempting to disconnect any connected device.")
+    introspection = await bus.introspect(BLUEZ_SERVICE, '/')
+    manager_obj = bus.get_proxy_object(BLUEZ_SERVICE, '/', introspection)
+    manager_iface = manager_obj.get_interface('org.freedesktop.DBus.ObjectManager')
+    managed_objects = await manager_iface.call_get_managed_objects()
+
+    for path, ifaces in managed_objects.items():
+        if DEVICE_IFACE in ifaces:
+            device_props = ifaces[DEVICE_IFACE]
+            if device_props.get('Connected', Variant('b', False)).value:
+                logging.info(f"Found connected device: {path}. Disconnecting...")
+                try:
+                    device_introspection = await bus.introspect(BLUEZ_SERVICE, path)
+                    device_obj = bus.get_proxy_object(BLUEZ_SERVICE, path, device_introspection)
+                    device_iface = device_obj.get_interface(DEVICE_IFACE)
+                    await device_iface.call_disconnect()
+                    logging.info(f"Successfully disconnected {path}")
+                    return # Assume only one device is connected
+                except Exception as e:
+                    logging.error(f"Failed to disconnect {path}: {e}")
+    logging.info("No connected device found to disconnect.")
+
+
 async def process_bluetooth_command(topic, text):
     global pairing_task
     logging.info('Bluetooth command: %s', text)
@@ -188,6 +213,8 @@ async def process_bluetooth_command(topic, text):
             logging.info('A pairing process is already active. Cancelling it to restart the timer.')
             pairing_task.cancel()
         pairing_task = asyncio.create_task(enable_pairing())
+    elif text == "kick":
+        await disconnect_connected_device()
 
 async def process_mqtt(message):
     text = message.payload.decode()