Expand v-btn-toggle to 100% width of container
Use d-flex
<v-btn-toggle v-model="type" mandatory tile color="primary" class="d-flex flex-row">
<v-btn value="text" class="flex-grow-1">Note</v-btn>
<v-btn value="list" class="flex-grow-1">List</v-btn>
<v-btn value="upload" class="flex-grow-1">Upload</v-btn>
</v-btn-toggle>