fix(0.1.22): 姓氏选择假功能修复——文档化传递链贯通

根因：GameEngine 构造硬编码 surname:'林'/familyName:'林氏'，
NewGame 输入的姓氏从未传入引擎（startNewGame 只传 seed）

修复：GameEngineOptions 增加 surname/familyName/motto/difficulty 透传；
store.startNewGame 全参传递；createWorldState 按 opts 建档（缺省林氏兜底）
验证：慕容家/慕容临渊 贯通（tsx 实证）+ 新增 2 例防回归测试

测试：1020 全绿（43+1 套件）；build 通过

src/renderer/game/engine/GameEngine.ts

@@ -13,6 +13,11 @@ export interface GameEngineOptions {
   seed?: string
   datapack?: Partial<DataPack>
   noAutoCreate?: boolean
+  /** 建档参数（NewGame 透传；缺省林氏兜底） */
+  surname?: string
+  familyName?: string
+  motto?: string
+  difficulty?: 'easy' | 'normal' | 'hard'
 }
 
 export type EngineStatus = 'idle' | 'running' | 'gameover'
@@ -39,10 +44,10 @@ export class GameEngine {
     // 组装World（内核注入→时钟/随机/总线单源）
     const state = opts.seed ? createWorldState({
       seed: this._seed,
-      surname: '林',
-      familyName: '林氏',
-      motto: '耕读传家，术法继世',
-      difficulty: 'normal'
+      surname: opts.surname?.trim() || '林',
+      familyName: opts.familyName?.trim() || `${opts.surname?.trim() || '林'}氏`,
+      motto: opts.motto?.trim() || '耕读传家，术法继世',
+      difficulty: opts.difficulty ?? 'normal'
     }) : (globalThis as never as { __state?: GameState }).__state
     this.world = new World(state!, [], this.kernel)
     this.facade = new ApiFacade(this.world, 1)