Fix lumi.gateway.mitw01 gateway mappings

[choucheyu]

Summary

• Add lumi.gateway.mitw01 (Taiwan Mi Control Hub) miio2miot mappings for light on/off, brightness, color, illumination, guard/alarm, volume, doorbell, and night-light properties.
• Add extended MIOT spec entries for the hub's missing light brightness/color, illumination sensor, and legacy gateway properties.
• Allow miio2miot set_template output to opt into raw dict params so legacy set_device_prop calls can send { "sid": "lumi.0", ... } without being wrapped in a list.
• Keep the miio props cache in sync when callbacks receive raw dict params.

Testing

• python3 -m py_compile custom_components/xiaomi_miot/core/miio2miot.py custom_components/xiaomi_miot/core/miio2miot_specs.py
• Parsed custom_components/xiaomi_miot/core/miot_specs_extend.json and asserted lumi.gateway.mitw01 contains light, illumination, and legacy gateway services.
• Imported miio2miot_specs.py directly and smoke-tested the new set_callback_via_param_index(..., key=...) path with raw dict params.
• Tested equivalent local patch on a real lumi.gateway.mitw01 hub: en_alarm_light changed via Home Assistant number.set_value, direct local get_device_prop read back the changed value, then restored; alarm_time_len was tested the same way and restored.

Notes

For this gateway, alarm_time_len and en_alarm_light are legacy miio device props. The working write form is:

{"method": "set_device_prop", "params": {"sid": "lumi.0", "alarm_time_len": 30}}

Wrapping that dict in a list returns a params error, so this PR adds raw_params support for these mappings.

[gemini-code-assist]

Code Review

This pull request adds support for the Taiwan Mi Control Hub (lumi.gateway.mitw01) by extending the MIOT specifications and mapping its properties. It also introduces a raw_params flag to handle raw parameter payloads and updates set_callback_via_param_index to support dictionary parameters. The feedback suggests adding a defensive type check in set_callback_via_param_index to ensure params is a list or tuple before checking its length, preventing potential TypeError crashes when raw_params is used.

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[gemini-code-assist]

If raw_params is enabled, params can potentially be None or a non-sequence type (e.g., if the template returns null for the params key). In such cases, calling len(params) will raise a TypeError: object of type 'NoneType' has no len(). Defensively checking if params is an instance of list or tuple before checking its length prevents potential runtime crashes.

Suggested change

	elif len(params) > index:
	value = params[index]
	if key and isinstance(value, dict):
	value = value.get(key)
	props[prop] = value
	elif isinstance(params, (list, tuple)) and len(params) > index:
	value = params[index]
	if key and isinstance(value, dict):
	value = value.get(key)
	props[prop] = value

[choucheyu]

Thanks, fixed in bc64930 by checking for list/tuple before len(params).