You shouldn't be playing with mains if you have such little faith and knowledge in your components. And couldn't be clear about the difference between a switch and a button.
There is no way to mechanically override that relay since it is a continuously energized coil.
Well, actually I wanted to make a light switch, but since the light would be toggled by both the switch and internet, it doesn't make sense to make a switch because it just toggles the light. Switch position doesn't represent the light's state. So it makes sense to use a button. But it doesn't really matter.
I know that playing with mains is dangerous) Thank you for worrying)
I also know that latching relay is controlled by the current.
Maybe I wasn't quite clear but I am wondering if a device (similar to relay) exists, which can be controlled both by current and by hand. Relay is controlled only by current.
I just thought that this kind of mechanism would be more reliable than just electronic stuff. I could be wrong of course)