It depends on the requirements. If you have several components sharing the requested data, you should put it into vuex for state management. If only one component uses the requested data, there is no need to put it into vuex.

Put the data request in the action, then commit the data to the mutation to change the state, and then the component can obtain it in the following way

computed: {
    ...mapState({
        'user'
    })
}

One of the benefits of vuex is the data sharing and communication between components among brothers. There is no need to put all data in vuex.

You can use Vuet with route rules to implement management page requests. You can take a look at this simple example

This really depends on your own data needs
There may be two types of data at this time.
1. Global data, this kind of data will be passed between each component. If this kind of data is only placed in the data of the component, then it will be more troublesome for your other components to use the data of this component. It is recommended to put this kind of data into state, so that it will be much more convenient for other components to retrieve the data. And various calculations can be applied.
2. Local data. This kind of data is unique data within the component. It is not used elsewhere. It doesn’t matter if you put this kind of data into the global state or the data of the component. But you can’t blindly put everything in the state. Over time, your state data will become messy. Therefore, the key is to store data according to the situation.