fix: harden tenant auth and quality gates

src/api/types/audit.ts

@@ -0,0 +1,11 @@
+export type AuditStatus = 'pending' | 'approved' | 'rejected';
+
+export type AuditItem = {
+  id: string;
+  customer: string;
+  type: '模板' | '签名';
+  content: string;
+  risk: 'low' | 'medium' | 'high';
+  status: AuditStatus;
+  submittedAt: string;
+};