fix: When retrieving the model list with multiple keys, select the first enabled one.

controller/channel.go

@@ -203,9 +203,19 @@ func FetchUpstreamModels(c *gin.Context) {
 		url = fmt.Sprintf("%s/v1/models", baseURL)
 	}
 
+	// 获取用于请求的可用密钥（多密钥渠道优先使用启用状态的密钥）
+	key, _, apiErr := channel.GetNextEnabledKey()
+	if apiErr != nil {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": fmt.Sprintf("获取渠道密钥失败: %s", apiErr.Error()),
+		})
+		return
+	}
+	key = strings.TrimSpace(key)
+
 	// 获取响应体 - 根据渠道类型决定是否添加 AuthHeader
 	var body []byte
-	key := strings.Split(channel.Key, "\n")[0]
 	switch channel.Type {
 	case constant.ChannelTypeAnthropic:
 		body, err = GetResponseBody("GET", url, channel, GetClaudeAuthHeader(key))