How can I edit the widget and plugin layout?

[kai]

Hi All,
I'm a newbie in nodebb. I'm not understand the layout logic nodebb in nodebb.
Actually I have a two feature need to change the template.

1. I would like to update active user widget: I need to add username under the avator box.
2. I would like to update the perrmission from nodebb-plugin-calendar: only admin can see the event response.

I found the template in the plugins folder and change the template tpl code. And also re-build the nodebb. However the layout a still not updated. May I know what is the correct method to make a small changes in nodebb and how to update the template layout ?

Thanks so much.

Nodebb version : 1.17.0