fix: 修复牌型识别、获胜显示、出牌区布局、移动端重连

1. 牌型识别: 新增三带一对、飞机、飞机带单/带对、四带二、四带两对
2. 获胜显示: 先显示最后出牌1秒后再弹出获胜对话框
3. 出牌区布局: 横向排列并换行
4. 移动端重连: 切回前台时自动重连WebSocket
5. 更新文档: README.md和API.md补充新增牌型

app/internal/ws/hub.go

@@ -185,6 +185,7 @@ func (c *Client) handleMessage(data []byte) {
 		}
 		room, _ := c.Hub.GameMgr.GetRoom(c.RoomID)
 		if room != nil && room.State == models.RoomStateFinished {
+			c.Hub.broadcastFinalState(c.RoomID, room)
 			c.Hub.broadcastToRoom(c.RoomID, models.Message{
 				Type: models.MsgTypeGameOver,
 				Data: map[string]string{"winnerId": room.LastWinner},
@@ -313,6 +314,34 @@ func (h *Hub) broadcastRoomState(roomID string) {
 	}
 }
 
+func (h *Hub) broadcastFinalState(roomID string, room *models.Room) {
+	h.mu.RLock()
+	clients := make([]*Client, 0)
+	for _, c := range h.Clients {
+		if c.RoomID == roomID {
+			clients = append(clients, c)
+		}
+	}
+	h.mu.RUnlock()
+
+	for _, c := range clients {
+		state := h.GameMgr.GetRoomState(roomID, c.ID)
+		if state != nil {
+			state.State = models.RoomStatePlaying
+			data, _ := json.Marshal(models.Message{
+				Type:      models.MsgTypeState,
+				Data:      state,
+				Timestamp: time.Now().Unix(),
+			})
+			select {
+			case c.Send <- data:
+			case <-c.done:
+			default:
+			}
+		}
+	}
+}
+
 func (h *Hub) BroadcastRoomLeft(roomID, playerID string) {
 	h.mu.RLock()
 	clients := make([]*Client, 0)