fix: simplify balance billing and govern operation logs

api/src/audit/audit.service.ts

@@ -17,11 +17,20 @@ export interface CreateOperationLogDto {
 export class AuditService {
   constructor(private readonly prisma: PrismaService) {}
 
-  list(tenantId?: string) {
-    return this.prisma.operationLog.findMany({
-      where: tenantId ? { tenantId } : undefined,
-      orderBy: { createdAt: 'desc' },
-    });
+  async list(tenantId?: string, pageInput?: number, pageSizeInput?: number) {
+    const page = positiveInteger(pageInput, 1);
+    const pageSize = Math.min(100, positiveInteger(pageSizeInput, 20));
+    const where = tenantId ? { tenantId } : undefined;
+    const [items, total] = await Promise.all([
+      this.prisma.operationLog.findMany({
+        where,
+        orderBy: [{ createdAt: 'desc' }, { id: 'desc' }],
+        skip: (page - 1) * pageSize,
+        take: pageSize,
+      }),
+      this.prisma.operationLog.count({ where }),
+    ]);
+    return { items, total, page, pageSize };
   }
 
   create(data: CreateOperationLogDto) {
@@ -38,3 +47,8 @@ export class AuditService {
     return this.prisma.operationLog.create({ data: createData });
   }
 }
+
+function positiveInteger(value: number | undefined, fallback: number) {
+  const normalized = Number(value);
+  return Number.isInteger(normalized) && normalized > 0 ? normalized : fallback;
+}