Add opt-in built-in Feishu OIDC issuer for OpenVPN

backend/internal/api/openvpn_oidc_readiness.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
+	"vpn-platform/backend/internal/identityprovider"
 	"vpn-platform/backend/internal/nginxgateway"
 	"vpn-platform/backend/internal/service"
 	"vpn-platform/backend/internal/tlsservice"
@@ -37,10 +38,15 @@ func (s *Server) openvpnOIDCReadiness(c *gin.Context) {
 		}
 	}
 	tls := tlsservice.Status()
+	builtInIssuer, builtInClientID, builtInEnabled := identityprovider.PublicClient()
+	port, _ := authGatewayPort(tls.Domain)
+	issuerRoute, callbackRoute := nginxgateway.AuthRouteReady(port)
 	c.JSON(http.StatusOK, gin.H{
 		"component_installed": path != "", "component_version": version,
 		"https_management_ready":     tls.Mode == "nginx" && tls.Valid && nginxgateway.Stage() == "https",
 		"management_domain":          tls.Domain,
-		"authentication_entry_ready": false, // Depends on a distinct callback site and a configured provider.
+		"authentication_entry_ready": port > 0 && callbackRoute,
+		"built_in_issuer":            builtInIssuer, "built_in_client_id": builtInClientID,
+		"built_in_enabled": builtInEnabled, "built_in_gateway_ready": issuerRoute,
 	})
 }