refactor: align codebase with EventCrew domain and trim legacy band stack

- Update API: events, users, policies, routes, resources, migrations
- Remove deprecated models/resources (customers, setlists, invitations, etc.)
- Refresh admin app and docs; remove apps/band

Made-with: Cursor

apps/app/src/@core/components/CustomizerSection.vue

@@ -0,0 +1,27 @@
+<script setup lang="ts">
+interface Props {
+  title: string
+  divider?: boolean
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  divider: true,
+})
+</script>
+
+<template>
+  <VDivider v-if="props.divider" />
+
+  <div class="customizer-section">
+    <div>
+      <VChip
+        size="small"
+        color="primary"
+      >
+        <span class="font-weight-medium">{{ props.title }}</span>
+      </VChip>
+    </div>
+
+    <slot />
+  </div>
+</template>