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/utils/vuetify.ts

@@ -0,0 +1,13 @@
+import type { LiteralUnion } from 'type-fest'
+import { cookieRef } from '@layouts/stores/config'
+
+export const resolveVuetifyTheme = (defaultTheme: LiteralUnion<'light' | 'dark' | 'system', string>): 'light' | 'dark' => {
+  const cookieColorScheme = cookieRef<'light' | 'dark'>('color-scheme', usePreferredDark().value ? 'dark' : 'light')
+  const storedTheme = cookieRef('theme', defaultTheme).value
+
+  return storedTheme === 'system'
+    ? cookieColorScheme.value === 'dark'
+      ? 'dark'
+      : 'light'
+    : storedTheme as 'light' | 'dark'
+}