fix permissions and teacher attendance workflows

apps/admin/vitest.config.ts

@@ -1,6 +1,7 @@
 import { defineConfig } from 'vitest/config';
 import react from '@vitejs/plugin-react';
 import path from 'node:path';
+import { playwright } from '@vitest/browser-playwright';
 
 export default defineConfig({
   plugins: [react()],
@@ -14,7 +15,8 @@ export default defineConfig({
     browser: {
       enabled: true,
       name: 'chromium',
-      provider: 'playwright',
+      provider: playwright(),
+      instances: [{ browser: 'chromium' }],
       headless: true,
       // Slow down interactions slightly so UI animations settle
       slowHijackESM: false,