refactor(0.1.14-P1): 内核归位——game/ 按引擎架构重排（零行为漂移）

结构（旧 game/core+engine → 新 engine/ 域）：
- engine/kernel/  时钟/随机/插件协议/fxqueue/timesense/format/urgency/guide/names（原 core）
- engine/narrative/  legacy/报告/列传/谱系/年轴（原 core 叙事族）
- engine/runtime/   World/creation/pcgen/ApiFacade/capabilities/pluginManager/boot/clocks + Systems/*（12 系统）
- engine/sim/     Market（未来 WorldSim 同行）
- 旧 game/core、engine/systems、engine/world.ts 等路径全部废弃（无 re-export 兼容层）

验证：35 套件/967 测试全绿（金钟罩三档零漂移=纯搬迁无行为变化）
typecheck 0 error

src/renderer/game/engine/kernel/plugin.ts

@@ -0,0 +1,56 @@
+import { GameClock, SystemHook } from './clock'
+import { DataPack } from '../../data/registry'
+import { EventDef } from '../../data/events'
+import type { World } from '../runtime/World'
+
+export type PluginKind = 'system' | 'data' | 'events' | 'content'
+
+export interface PluginHookGuard {
+  onLoad?(): void
+  onDisable?(): void
+  onEnable?(): void
+  onUninstall?(): void
+}
+
+export interface CotycPlugin {
+  id: string
+  name: string
+  version: string
+  author?: string
+  description: string
+  kind: PluginKind
+  dependencies?: string[]
+  conflicts?: string[]
+  install(ctx: PluginContext): void
+  uninstall?(ctx: PluginContext): void
+  hooks?: PluginHookGuard
+  protected?: boolean
+}
+
+export interface PluginContext {
+  world: World
+  clock: GameClock
+  register: (phase: Parameters<GameClock['register']>[0], fn: SystemHook) => () => void
+  onYearStart: (fn: SystemHook) => () => void
+  addCapability: (cap: { id: string; name: string; version: string; desc: string }) => void
+  removeCapability: (id: string) => void
+  enableCapability: (id: string, enabled: boolean) => void
+  overridePack: (partial: Partial<DataPack>) => void
+  resetPack: () => void
+  addEventPool: (id: string, events: EventDef[]) => void
+  removeEventPool: (id: string) => void
+}
+
+export interface PluginStatus {
+  id: string
+  name: string
+  version: string
+  kind: PluginKind
+  installed: boolean
+  enabled: boolean
+  protected: boolean
+  description: string
+  dependencies?: string[]
+}
+
+export type PluginChange = { id: string; action: 'install' | 'remove' | 'enable' | 'disable' }