fix: connect operations pages to real backend

api/src/billing/billing.service.spec.ts

@@ -35,6 +35,9 @@ function createPrismaMock() {
       findMany: jest.fn(),
       create: jest.fn(),
     },
+    operationLog: {
+      create: jest.fn(),
+    },
   };
 }
 
@@ -131,6 +134,13 @@ describe('BillingService', () => {
         relatedType: 'recharge_order',
       }),
     });
+    expect(prisma.operationLog.create).toHaveBeenCalledWith({
+      data: expect.objectContaining({
+        action: 'billing.manual_recharge',
+        resource: 'recharge_order',
+        resourceId: 'order-1',
+      }),
+    });
   });
 
   it('writes freeze, charge, release, refund, and adjustment transactions', async () => {