fix: simplify balance billing and govern operation logs

api/src/operations/operations.service.spec.ts

@@ -26,7 +26,7 @@ function createPrismaMock() {
       aggregate: jest.fn().mockResolvedValue({ _count: { _all: 2 }, _sum: { amountCents: 20, billingUnits: 2 } }),
     },
     accountTransaction: {
-      aggregate: jest.fn().mockResolvedValue({ _count: { _all: 2 }, _sum: { amountCents: -20, smsUnits: -2 } }),
+      aggregate: jest.fn().mockResolvedValue({ _count: { _all: 2 }, _sum: { amountCents: -20 } }),
     },
     tenantAccount: {
       findMany: jest.fn().mockResolvedValue([{ tenantId: 'tenant-1', balanceCents: 1000, tenant: { name: '租户A' } }]),
@@ -331,6 +331,36 @@ describe('OperationsService', () => {
     );
   });
 
+  it('applies operation-log level filters before database pagination', async () => {
+    const prisma = createPrismaMock();
+    const service = new OperationsService(prisma as never);
+
+    await service.systemLogs({ level: 'error', page: 2, pageSize: 5 });
+
+    expect(prisma.operationLog.findMany).toHaveBeenCalledWith(expect.objectContaining({
+      where: expect.objectContaining({
+        AND: expect.objectContaining({ OR: expect.any(Array) }),
+      }),
+      skip: 5,
+      take: 5,
+    }));
+    expect(prisma.operationLog.count).toHaveBeenCalledWith({
+      where: expect.objectContaining({ AND: expect.objectContaining({ OR: expect.any(Array) }) }),
+    });
+  });
+
+  it('caps legacy audit-log reads with pagination', async () => {
+    const prisma = createPrismaMock();
+    const service = new OperationsService(prisma as never);
+
+    await expect(service.auditLogs({ page: 1, pageSize: 1_000 })).resolves.toEqual(expect.objectContaining({
+      total: 1,
+      page: 1,
+      pageSize: 100,
+    }));
+    expect(prisma.operationLog.findMany).toHaveBeenCalledWith(expect.objectContaining({ take: 100 }));
+  });
+
   it('returns paginated gateway submit dead letters', async () => {
     const prisma = createPrismaMock();
     const service = new OperationsService(prisma as never);