left drawer panel in single file component

MusicForMellons

Anyone has a working left drawer panel in a single file component?

<template>
  <q-layout ref="layout"
            :left-breakpoint=0>
    <q-scroll-area slot="left" style="width: 80%; height: 100%">
        <left-panel></left-panel>
    </q-scroll-area> 
etc

My questions:

I do not quite get why I can not include the q-scroll-area into the left-panel component I have…
open/ close will work via vuex…, an example how to do this?