feat: 添加走棋记录、对局记录实体，房间新增观战开关

src/main/java/com/webgame/webgamebackend/entities/GameMoveEntity.java

@@ -0,0 +1,47 @@
+package com.webgame.webgamebackend.entities;
+
+import com.webgame.webgamebackend.entities.base.UUIDBaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.experimental.Accessors;
+
+/**
+ * 走棋记录实体
+ *
+ * 记录每一步走棋：所属房间、下棋玩家、棋盘坐标、步序号。
+ * 坐标系约定：(0,0) 为棋盘左上角。
+ */
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Accessors(chain = true)
+@Table(name = "game_move")
+public class GameMoveEntity extends UUIDBaseEntity {
+
+    /** 所属房间 ID */
+    @Column(name = "room_id", nullable = false, length = 64)
+    private String roomId;
+
+    /** 下棋玩家的 account_id */
+    @Column(name = "player_id", nullable = false, length = 64)
+    private String playerId;
+
+    /** 落子行坐标（0 起始，从上往下） */
+    @Column(name = "row_num", nullable = false)
+    private Integer rowNum;
+
+    /** 落子列坐标（0 起始，从左往右） */
+    @Column(name = "col_num", nullable = false)
+    private Integer colNum;
+
+    /** 步序号（从 1 开始递增） */
+    @Column(name = "move_index", nullable = false)
+    private Integer moveIndex;
+}

src/main/java/com/webgame/webgamebackend/entities/GameRecordEntity.java

@@ -0,0 +1,48 @@
+package com.webgame.webgamebackend.entities;
+
+import com.webgame.webgamebackend.entities.base.UUIDBaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.experimental.Accessors;
+
+import java.time.LocalDateTime;
+
+/**
+ * 对局记录实体
+ *
+ * 每局游戏结束后生成一条记录，包含胜负结果。
+ */
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Accessors(chain = true)
+@Table(name = "game_record")
+public class GameRecordEntity extends UUIDBaseEntity {
+
+    /** 所属房间 ID */
+    @Column(name = "room_id", nullable = false, length = 64)
+    private String roomId;
+
+    /** 胜方 account_id（平局时为 null） */
+    @Column(name = "winner_id", length = 64)
+    private String winnerId;
+
+    /** 结果类型：win（一方获胜）、draw（平局）、resign（认输） */
+    @Column(name = "result_type", nullable = false, length = 16)
+    private String resultType;
+
+    /** 对局开始时间 */
+    @Column(name = "started_at", nullable = false)
+    private LocalDateTime startedAt;
+
+    /** 对局结束时间 */
+    @Column(name = "ended_at")
+    private LocalDateTime endedAt;
+}

src/main/java/com/webgame/webgamebackend/entities/GameRoomEntity.java

@@ -67,6 +67,12 @@ public class GameRoomEntity extends UUIDBaseEntity {
     @Column(name = "password", length = 64)
     private String password;
 
+    /**
+     * 是否允许观战
+     */
+    @Column(name = "allow_spectate", nullable = false)
+    private Boolean allowSpectate = true;
+
     /**
      * 房间状态：waiting / playing / finished
      */

src/main/java/com/webgame/webgamebackend/service/GomokuGameService.java

@@ -0,0 +1,48 @@
+package com.webgame.webgamebackend.service;
+
+import com.webgame.webgamebackend.ws.RoomSessionManager;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+/**
+ * 五子棋游戏服务
+ *
+ * 处理五子棋对局的核心逻辑：落子、胜负判定、认输、和棋、准备等。
+ * TODO: 后续任务完善实现
+ */
+@Slf4j
+@Service
+public class GomokuGameService {
+
+    public void placeStone(String roomId, String userId, int row, int col, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] placeStone 暂未实现, roomId={}, userId={}, row={}, col={}", roomId, userId, row, col);
+    }
+
+    public void toggleReady(String roomId, String userId, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] toggleReady 暂未实现, roomId={}, userId={}", roomId, userId);
+    }
+
+    public void resign(String roomId, String userId, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] resign 暂未实现, roomId={}, userId={}", roomId, userId);
+    }
+
+    public void requestDraw(String roomId, String userId, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] requestDraw 暂未实现, roomId={}, userId={}", roomId, userId);
+    }
+
+    public void respondToDraw(String roomId, String userId, boolean accept, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] respondToDraw 暂未实现, roomId={}, userId={}, accept={}", roomId, userId, accept);
+    }
+
+    public void leaveRoom(String roomId, String userId, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] leaveRoom 暂未实现, roomId={}, userId={}", roomId, userId);
+    }
+
+    public void startGame(String roomId, String userId, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] startGame 暂未实现, roomId={}, userId={}", roomId, userId);
+    }
+
+    public void handleDisconnect(String roomId, String userId, RoomSessionManager sessionManager) {
+        log.warn("[GomokuGameService] handleDisconnect 暂未实现, roomId={}, userId={}", roomId, userId);
+    }
+}

src/main/java/com/webgame/webgamebackend/ws/RoomWebSocketHandler.java

@@ -6,6 +6,7 @@ import com.alibaba.fastjson2.JSONObject;
 import com.webgame.webgamebackend.service.GomokuGameService;
 import com.webgame.webgamebackend.ws.dto.WsInboundMessage;
 import com.webgame.webgamebackend.ws.dto.WsMessage;
+import com.webgame.webgamebackend.ws.dto.WsOutboundMessage;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;