fix: 允许服务端为缺失 sessionId 自动生成会话ID

internal/ws/handler.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/gofiber/contrib/v3/websocket"
 	"github.com/gofiber/fiber/v3"
+	"github.com/google/uuid"
 	"github.com/vmihailenco/msgpack/v5"
 )
 
@@ -230,7 +231,10 @@ func (h *Handler) handleTextMessage(s *session, data []byte) {
 }
 
 func (h *Handler) handleStart(s *session, msg ClientMsg) {
-	if msg.SessionID == "" || len(msg.SessionID) > 96 {
+	if msg.SessionID == "" {
+		msg.SessionID = uuid.NewString()
+	}
+	if len(msg.SessionID) > 96 {
 		h.sendError(s, "invalid_session", "invalid sessionId", false, "")
 		return
 	}