Refresh tunnel actions promptly and clarify Feishu OIDC setup

backend/internal/api/api.go

@@ -1040,12 +1040,14 @@ func (s *Server) startTunnel(c *gin.Context) {
 		t.State = "error"
 		t.LastError = err.Error()
 		store.DB.Save(t)
+		s.mgr.RemoveStatus(t.ID)
 		c.JSON(500, gin.H{"error": err.Error()})
 		return
 	}
 	t.State = "running"
 	t.LastError = ""
 	store.DB.Save(t)
+	s.mgr.RemoveStatus(t.ID) // the monitor's previous snapshot can lag behind this transition
 	store.Audit(c.GetString("username"), "start_tunnel", t.Name, "")
 	c.JSON(200, gin.H{"ok": true, "state": "running"})
 }
@@ -1068,6 +1070,7 @@ func (s *Server) stopTunnel(c *gin.Context) {
 	}
 	t.State = "stopped"
 	store.DB.Save(t)
+	s.mgr.RemoveStatus(t.ID)
 	store.Audit(c.GetString("username"), "stop_tunnel", t.Name, "")
 	c.JSON(200, gin.H{"ok": true, "state": "stopped"})
 }