feat: Improve shopping list label sections (#6345)

Co-authored-by: Michael Genson <71845777+michael-genson@users.noreply.github.com>

frontend/components/global/BaseExpansionPanels.vue

@@ -0,0 +1,17 @@
+<template>
+  <v-expansion-panels v-model="open">
+    <slot />
+  </v-expansion-panels>
+</template>
+
+<script setup lang="ts">
+interface Props {
+  startOpen?: boolean;
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  startOpen: false,
+});
+
+const open = ref(props.startOpen ? [0] : []);
+</script>