Problems with opening a tabs project

I’m a beginner in Ionic. I have a problem: when I launch a tab project and when I run it it doesn’t give me a tab. I think my explications are unclear so here are pics:

My codes:

What I get when I run it:

And here is what I try to achieve :

Please, can you help me, I don’t understand where is the problem.

Thanks for your attention.

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