feat: initial commit — backend API + student cabinet frontend

- Go backend: auth (JWT), points earn/spend, QR token generation,
  partners, admin grant/stats endpoints with chi router
- Next.js 14 frontend: login, student dashboard, transaction history,
  QR display, partners list
- PostgreSQL migrations (4 tables), Redis cache, Docker Compose
- CORS middleware, role-based route protection, Zustand auth store

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/components/ui/Badge.tsx

@@ -0,0 +1,29 @@
+import type { TransactionType } from '@/lib/types';
+
+const TYPE_LABELS: Record<TransactionType, string> = {
+  earn: 'Начисление',
+  spend: 'Списание',
+  admin_grant: 'Начисление',
+  expire: 'Сгорание',
+};
+
+const TYPE_CLASSES: Record<TransactionType, string> = {
+  earn: 'bg-green-900/50 text-green-400',
+  spend: 'bg-red-900/50 text-red-400',
+  admin_grant: 'bg-blue-900/50 text-blue-400',
+  expire: 'bg-gray-700 text-gray-400',
+};
+
+interface BadgeProps {
+  type: TransactionType;
+}
+
+export function Badge({ type }: BadgeProps) {
+  return (
+    <span
+      className={`inline-flex shrink-0 items-center rounded-full px-2 py-0.5 text-xs font-medium ${TYPE_CLASSES[type]}`}
+    >
+      {TYPE_LABELS[type]}
+    </span>
+  );
+}