feat(admin): web admin panel — user CRUD, role assignment, system health (#150)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/lib/auth-client.ts

@@ -1,7 +1,9 @@
 import { createAuthClient } from 'better-auth/react';
+import { adminClient } from 'better-auth/client/plugins';
 
-export const authClient: ReturnType<typeof createAuthClient> = createAuthClient({
+export const authClient = createAuthClient({
   baseURL: process.env['NEXT_PUBLIC_GATEWAY_URL'] ?? 'http://localhost:4000',
+  plugins: [adminClient()],
 });
 
 export const { useSession, signIn, signUp, signOut } = authClient;