Implement active user tiers, class-based Tailwind theme switcher, 3-tiled static dashboard layout, Minio object storage integration, school & state settings database sync, and streak wishes onboarding modal

src/store/cbtStore.ts

@@ -238,9 +238,7 @@ export const useCBTStore = create<CBTState>()(
         if (!payload) return;
 
         try {
-          const rawUrl = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000';
-          const apiUrl = rawUrl.replace(/\/$/, '');
-          const res = await fetch(`${apiUrl}/api/attempts/submit`, {
+          const res = await fetch(`/api/attempts/submit`, {
             method: 'POST',
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify(payload),