refactor(game): 移除废弃的房间状态管理文件并优化游戏页面

- 删除 src/state/active-room.ts 文件及其相关导入引用
- 更新 ChengduGamePage.vue 中的导入路径从 features/chengdu-game/useChengduGameRoom 到 game/chengdu
- 移除 ChengduGamePage.vue 中不再需要的状态变量如 roomId、startGamePending 等
- 简化 roomStatusText 计算属性逻辑，移除 "等待中" 默认值
- 调整 phaseLabelMap 映射，移除 "摸牌" 阶段显示
- 删除多个废弃的计算属性如 centerTimer、selectedTileText、pendingClaimText 等
- 移除 actionTheme 函数及相关的按钮样式绑定
- 清理游戏场景中的装饰元素如 diamond outline、scene watermark、center desk 等
- 更新 HallPage.vue 中的导入路径到 store/active-room-store
- 添加缺失的玩家数据字段如 hand、melds、outTiles、hasHu
- 调整 CSS 样式包括工具栏位置、动画角度和时钟位置等视觉优化

src/views/HallPage.vue

@@ -4,8 +4,8 @@ import { useRouter } from 'vue-router'
 import { AuthExpiredError, type AuthSession } from '../api/authed-request'
 import { createRoom, joinRoom, listRooms, type RoomItem } from '../api/mahjong'
 import { getUserInfo, type UserInfo } from '../api/user'
-import { hydrateActiveRoomFromSelection } from '../state/active-room'
-import type { RoomPlayerState } from '../state/active-room'
+import { hydrateActiveRoomFromSelection } from '../store/active-room-store'
+import type { RoomPlayerState } from '../store/active-room-store'
 import type { StoredAuth } from '../types/session'
 import { clearAuth, readStoredAuth, writeStoredAuth } from '../utils/auth-storage'
 
@@ -129,6 +129,10 @@ function mapRoomPlayers(room: RoomItem): RoomPlayerState[] {
       index: Number.isFinite(item.index) ? item.index : fallbackIndex,
       playerId: item.player_id,
       ready: Boolean(item.ready),
+      hand: [],
+      melds: [],
+      outTiles: [],
+      hasHu: false,
     }))
     .filter((item) => Boolean(item.playerId))
 }