fix(agent): 防止重复申请代理商

addons/shopro/controller/user/Agent.php

@@ -25,6 +25,14 @@ class Agent extends Common
         $userId = $user->id ?? 0;
         custom_log('[agent.apply] 收到代理申请请求, user_id=' . $userId, $userId, 'share');
 
+        // 校验是否已有代理商记录
+        $existAgent = AgentModel::where('user_id', $userId)->find();
+        if ($existAgent) {
+            $statusText = (new AgentModel)->statusList()[$existAgent->status] ?? $existAgent->status;
+            custom_log('[agent.apply] 已存在代理商记录, agent_id=' . $existAgent->id . ', status=' . $existAgent->status, $userId, 'share', 'warning');
+            $this->error("您已是代理商，当前状态：{$statusText}");
+        }
+
         // 校验消费累计条件
         $commissionConfig = new \addons\shopro\service\commission\Config();
         $becomeAgentEvent = $commissionConfig->getBecomeAgentEvent();