Yii 2在网站主页上添加面板

We are currently developing a somewhat an accounting system and I want that when user successfully logs in, he/she will be redirected to a page that would look like this (not exactly):

Panels of different modules of the system.

If you take a look at WaveApps dashboard, it looks like this: They don't basically implement paneling. I just want you to get my point.

I want that the first thing that user will able to see after logging in is the "dashboard" of the system (just like after logging in in WaveApps).

I want to know how to put something like, for example in the first picture, the Calendar panel (is 'panel' even the right term? that 'panel' though is collapsible). Those panels we see in the first picture. How do we implement that in Yii 2? What code do I use? I haven't tried anything since I can't find one on any of my Google searches.