feat: add smoke tests, agent credit ledger, and player cashback page

Introduce admin smoke-test suite with API probes, agent credit transaction history, and player cashback records; fix SmokeTestModule DI and polish admin/player UI assets.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/domains/operations/cashback/cashback.service.ts

@@ -474,10 +474,33 @@ export class CashbackService {
   }
 
   async getUserCashbacks(userId: bigint) {
-    return this.prisma.cashbackItem.findMany({
-      where: { userId },
-      include: { batch: true },
+    const items = await this.prisma.cashbackItem.findMany({
+      where: { userId, batch: { status: 'CONFIRMED' } },
+      include: {
+        batch: {
+          select: {
+            batchNo: true,
+            periodStart: true,
+            periodEnd: true,
+            confirmedAt: true,
+            status: true,
+          },
+        },
+      },
       orderBy: { createdAt: 'desc' },
     });
+
+    return items.map((item) => ({
+      id: item.id.toString(),
+      batchNo: item.batch.batchNo,
+      periodStart: item.batch.periodStart,
+      periodEnd: item.batch.periodEnd,
+      confirmedAt: item.batch.confirmedAt,
+      effectiveStake: item.effectiveStake.toString(),
+      betCount: item.betCount,
+      rate: item.rate.toString(),
+      amount: item.amount.toString(),
+      createdAt: item.createdAt,
+    }));
   }
 }