refactor: Migrate OIDC configuration to system settings

controller/option.go

@@ -6,6 +6,7 @@ import (
 	"one-api/common"
 	"one-api/model"
 	"one-api/setting"
+	"one-api/setting/system_setting"
 	"strings"
 
 	"github.com/gin-gonic/gin"
@@ -51,8 +52,8 @@ func UpdateOption(c *gin.Context) {
 			})
 			return
 		}
-	case "OIDCEnabled":
-		if option.Value == "true" && common.OIDCClientId == "" {
+	case "oidc.enabled":
+		if option.Value == "true" && system_setting.GetOIDCSettings().Enabled {
 			c.JSON(http.StatusOK, gin.H{
 				"success": false,
 				"message": "无法启用 OIDC 登录，请先填入 OIDC Client Id 以及 OIDC Client Secret！",