更新若干bug

app/admin/controller/Cms/Domain/TenantDomainController.php

@@ -117,6 +117,18 @@ class TenantDomainController extends BaseController
             ]);
         }
 
+        // 检查该租户是否已有域名数据
+        $hasDomain = TenantDomain::where('tid', $tid)
+            ->where('delete_time', null)
+            ->find();
+
+        if ($hasDomain) {
+            return json([
+                'code' => 400,
+                'msg' => '该租户已有域名，请删除后再次申请'
+            ]);
+        }
+
         if (empty($subDomain)) {
             return json([
                 'code' => 400,