refactor(0.1.14-P2): Kernel 三合一 + GameEngine 引擎门面

- Kernel（engine/kernel/Kernel.ts）：游戏时钟+种子随机+事件总线——单一实例三合一，
  World 不再自造 clock/rng（内核注入，bus 透传 out）
- GameEngine（engine/GameEngine.ts）：唯一引擎入口——
  new GameEngine({seed,datapack}) → world/facade/kernel/datapack，
  advance/act/query/subscribe/about/installPlugin/snapshot/restore/status
- World 构造接受 kernel 注入（保持行为等价：时钟注册顺序不变）
- ApiFacade.subscribe 简化纯实现
- 验证：967 测试全绿、金钟罩三档零漂移、typecheck 0 error

src/renderer/game/engine/runtime/ApiFacade.ts

@@ -115,6 +115,7 @@ export class GameFacade {
     }
   }
 
+
   subscribe(on: (e: FacadeEvent) => void): () => void {
     const bus: WorldEventBus = {
       onLog: (kind: LogKind, text: string) => on({ type: 'log', kind, text, year: this.world.state.year, month: this.world.state.month }),

src/renderer/game/engine/runtime/World.ts

@@ -8,7 +8,7 @@ import {
   Realm,
   YearlyReport
 } from '../../types/domain'
-import { Rng } from '../kernel/rng'
+
 import { BUILDINGS } from '../../data/buildings'
 import { POSTS } from '../../data/posts'
 import { aspirationById as aspirationOf } from '../../data/aspirations'
@@ -16,6 +16,11 @@ import { computeLegacy, resolveLegacy, peakRealmIndex, grandTechniqueCount, Lega
 import { createWorldState, findInheritor } from './creation'
 import { SYSTEM_DEFS, SystemDef } from './capabilities'
 import { emptyClock } from './clocks'
+import { Rng } from '../kernel/rng'
+
+function clockFromKernel(_target: GameClock, source: GameClock): void {
+  void source
+}
 import { CotycPlugin, PluginContext, PluginStatus } from '../kernel/plugin'
 import { PluginManager } from './pluginManager'
 import { EventDef } from '../../data/events'
@@ -88,13 +93,20 @@ export class World {
   systems: Record<string, { enabled: boolean }>
   plugins: PluginManager
   private eventPools = new Map<string, EventDef[]>()
+  kernel?: import('../kernel/Kernel').Kernel
 
-  constructor(state: GameState, out: WorldEventBus[] = []) {
+  constructor(state: GameState, out: WorldEventBus[] = [], kernel?: import('../kernel/Kernel').Kernel) {
     normalizeGameState(state)
     this.state = state
-    this.rng = new Rng(state.rng)
     this.out = out
     this.clock = emptyClock()
+    if (kernel) {
+      this.kernel = kernel
+      this.rng = kernel.rng
+      clockFromKernel(this.clock, kernel.clock)
+    } else {
+      this.rng = new Rng(state.rng)
+    }
     this.systems = Object.fromEntries(SYSTEM_DEFS.map((d) => [d.id, { enabled: true }]))
     this.plugins = new PluginManager(this.buildPluginContext())
     this.installCorePlugins()