调整机器人退出策略

src/robot/Robot.ts

@@ -135,6 +135,10 @@ export class Robot {
         case GameStateConst.STATE_DICE_TURN:
           self.discard()
           break
+        case GameStateConst.STATE_GAME_OVER:
+          self.room.leave()
+          self.room.removeAllListeners()
+          break
       }
     })
   }

src/rooms/GeneralRoom.ts

@@ -204,6 +204,10 @@ export class GeneralRoom extends Room {
 
   // 掉线逻辑
   async onLeave(client: Client, consented: boolean) {
+    if (this.clients.length === 0) {
+      this.disconnect()
+      return
+    }
     if (this.state.gameState === GameStateConst.STATE_GAME_OVER || this.state.gameState === GameStateConst.STATE_WAIT_JOIN) {
       this.state.players.delete(client.sessionId)
       if (this.assistMap.has(client.sessionId)) {