feat: add customer session refresh functionality and improve session management

- Introduced RealtimeCustomerSessionRefreshPayload and RealtimeCustomerSessionRefreshEvent types for handling session refresh events.
- Updated ws_service to verify customer session and handle session refresh notifications.
- Enhanced API client to manage customer session tokens and expiration.
- Implemented customer session validation and storage in session storage.
- Added functions to exchange and ensure customer sessions.
- Updated IM real-time connection to include customer session tokens in WebSocket requests.
- Modified SDK and widget configurations to support external IDs and user tokens.

internal/middleware/chat_middleware.go

@@ -2,7 +2,6 @@ package middleware
 
 import (
 	"cs-agent/internal/pkg/irisx"
-	"cs-agent/internal/pkg/openidentity"
 	"cs-agent/internal/services"
 
 	"github.com/kataras/iris/v12"
@@ -16,13 +15,13 @@ func ExternalUserMiddleware(ctx iris.Context) {
 		_ = ctx.JSON(web.JsonErrorMsg("接入渠道异常"))
 		return
 	}
-	secret := services.ChannelService.GetUserTokenSecret(channel)
-	ext, err := openidentity.GetExternalUser(ctx, secret)
+	result, err := services.CustomerSessionService.VerifyRequest(ctx, channel)
 	if err != nil {
 		ctx.StopExecution()
 		_ = ctx.JSON(web.JsonError(err))
 		return
 	}
-	irisx.SetExternalUser(ctx, ext)
+	services.CustomerSessionService.SetRefreshHeaders(ctx, result)
+	irisx.SetExternalUser(ctx, result.ExternalUser)
 	ctx.Next()
 }