Add a CanLight control capability rendering a single status-aware Light toggle button. The ADC2W white light is driven via CoaxialControlIO.control (Type 1, numeric IO); the button queries live state and reflects it (amber when on).
To get device state to the browser, add an opt-in two-way response path to the control protocol: zmcontrol writes a JSON result back only when a request sets wants_response (fire-and-forget commands unchanged, SIGPIPE-safe); Monitor::sendControlCommandWithResponse and ajax/control.php return it.
Also adds get_config/set_config/probe to Dahua_RPC for characterising cameras, the CanLight column (migration zm_update-1.39.12.sql), edit-UI checkbox, and a config unit test.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* experiment with namespaces on the Server class
* experiment with namespaces on the Server class
* Implement the ZM namespace on objects
* Implement the ZM namespace on objects
* Implement the ZM namespace on objects
