I was thinking about this, but in this case, the auto-import feature is lost, so i need import component globally, or in every place.
Also I need use my names for components. And I finally - lost Vetur autocompletion in templates

My fault! interference with other components with same props. E.g. fab has ‘square’ prop, but i want to set default only for q-filed and q-input. Or no-caps only for buttons, not for q-tabs. Is there some way to configure default values for props for definite component?
(sorry for bad english )

e.g. I want to set default no-caps for all q-btn, q-tabs (and everywhere), i can use dirty hack with global mixin in boot file:

export default function ({ Vue }) {
  const strategies = Vue.config.optionMergeStrategies
  strategies.props = function (parent, child) {
    const result = { ...parent, ...child }
    if (parent?.noCaps) {
      result.noCaps = parent.noCaps
    }
    return result
  }
  Vue.mixin({
    props: {
      noCaps: {
        type: Boolean, default: true
      }
    }
  })
  // strategies.props = strategies.methods
}

but what if I want to set all my q-input and q-field “square filled” without interference with q-card?

E.g in beforeRouteEnter hook?
I try make it in this way (store is dynamically filled in boot folder):

import StoreFunction from 'store';
const store = StoreFunction();
...
export default {

  beforeRouteEnter(to, from, next) {
    if (store.state.catalog.loading) next({to: 'routename'});
    else next();
  }

but it causes an error “do not mutate vuex store state outside mutation handlers.”

to fix it, I change store/index.js to return store instance instead of function, and it works. But I’m worrying about possible side effects of this ‘fix’.

//export default function(/* { ssrContext } */) {
  export default new Vuex.Store({

Is this right fix, or there is another ‘proper’ way in my case?