fix: 移除Header Tab栏(与侧边栏重复); 修复approve/reject 400(ApproveRequest去掉required binding)

frontend/src/services/api.ts

@@ -522,7 +522,7 @@ export const auditApi = {
   },
 };
 
-// ==================== SQL 审计 API（暂无后端，返回空结果优雅降级） ====================
+// ==================== SQL 审计 API ====================
 export const sqlAuditApi = {
   getRecords: async (params?: Record<string, string>) => {
     return http.get<ListResponse>('/sql-audit/records', params);