refactor(game): 重构项目结构,优化链路, 移动端适配

- 移除 useGameBoardVm 数据层实施说明文档
- 移除核心玩法与前端规则摘要文档
- 移除游戏模块数据与界面分层第一阶段实施稿文档
- 清理与数据层重构相关的技术方案说明
- 删除关于 PC 和 Mobile 界面分离的设计规划
- 移除 view-model hooks 架构设计相关内容

src/features/game/shared/initial-state.ts

@@ -1,5 +1,8 @@
-import { DEFAULT_CHIP_AMOUNTS } from '@/constants'
-import { DEFAULT_GAME_CHIP_COLORS, GAME_MAX_SELECTION_CELLS } from './constants'
+import {
+  DEFAULT_CHIP_AMOUNTS,
+  DEFAULT_GAME_CHIP_COLORS,
+  GAME_MAX_SELECTION_CELLS,
+} from '@/constants'
 import type {
   AnnouncementState,
   Chip,
@@ -7,7 +10,7 @@ import type {
   DashboardState,
   GameBootstrapSnapshot,
   RoundSnapshot,
-} from './types'
+} from '@/type'
 
 function createEmptyRoundSnapshot(nowIso: string): RoundSnapshot {
   return {