feat(0.1.14-P4/P5): UI 单点 + 引擎级测试（979）+ 顶栏天下风云

- GameScreen 顶栏「天下风云」胶囊：潮汐印（灵涨/汐平/灵衰）+ 物价标签（物腾/平稳/物贱）
  + title 显示最近快讯（worldsim-brief 纯函数）
- store 接 GameEngine 起点（startNewGame 走引擎；facade/engine 单源）
- 新测试 gameengine.test.ts ×12：引擎门面（构造/advance单源/act+query+subscribe/datapack覆写+restore/about）
  Kernel 三合一 / WorldSim 世界健康（3 seed × 1000 月：池/灵气在界、换代>0、快讯≤120）/ sim 联动
- 全量 36 套件 / 979 测试通过；金钟罩三档固化（0.1.14 正式）；typecheck 0 error
- AGENTS 补「引擎系统」章节；版本 0.1.14

tests/gameengine.test.ts

@@ -0,0 +1,118 @@
+import { describe, expect, it } from 'vitest'
+import { GameEngine } from '../src/renderer/game/engine/GameEngine'
+import { makeKernel } from '../src/renderer/game/engine/kernel/Kernel'
+import { WorldSim } from '../src/renderer/game/engine/sim/WorldSim'
+import { WORLDSIM } from '../src/renderer/game/engine/sim/worldsim-data'
+
+describe('GameEngine 引擎门面', () => {
+  it('构造：内核注入世界 + 门面 + 数据包', () => {
+    const e = new GameEngine({ seed: 'engine-1' })
+    expect(e.world).toBeTruthy()
+    expect(e.facade).toBeTruthy()
+    expect(e.kernel.clock.subscriptionCount()).toBeGreaterThanOrEqual(10)
+    expect(e.status()).toBe('running')
+  })
+
+  it('advance 驱动内核时钟（确定单源）', () => {
+    const e = new GameEngine({ seed: 'engine-2' })
+    const y0 = e.view().year
+    const m0 = e.view().month
+    e.advance()
+    const crossed = e.view().month === 1 && e.view().year === y0 + 1
+    const normal = e.view().month === m0 + 1
+    expect(crossed || normal).toBe(true)
+  })
+
+  it('act/query/subscribe 全链路', () => {
+    const e = new GameEngine({ seed: 'engine-3' })
+    const events: string[] = []
+    const unsub = e.subscribe((ev) => events.push(ev.type))
+    expect(e.act('member.post', { memberId: 'x3', post: 'elder' })).toBe(true)
+    e.advance()
+    // 一次 advance 必然产生内核事件流（log/pending/paper 至少其一)
+    expect(events.length).toBeGreaterThan(0)
+    unsub()
+    const fam = e.query('family') as { year: number }
+    expect(fam.year).toBeGreaterThanOrEqual(1)
+  })
+
+  it('datapack 覆写生效 + restore 可回放', () => {
+    const e = new GameEngine({ seed: 'engine-4' })
+    e.datapack.override({
+      items: { ...e.datapack.current().items, lingcao: { ...e.datapack.current().items['lingcao'], basePrice: 250 } }
+    })
+    const snap = e.snapshot()
+    expect(snap.family.stones).toBeGreaterThanOrEqual(0)
+    e.restore(snap)
+    expect(e.status()).toBe('running')
+  })
+
+  it('about 元数据含 plugins（≥3）与版本 0.1.14', () => {
+    const e = new GameEngine({ seed: 'engine-5' })
+    const a = e.about()
+    expect(a.plugins).toBeGreaterThanOrEqual(3)
+    expect(a.version).toContain('0.1.14')
+  })
+})
+
+describe('Kernel 三合一', () => {
+  it('时钟/随机/总线协同（同 seed 同随机序列）', () => {
+    const k1 = makeKernel('kernel-a')
+    const k2 = makeKernel('kernel-a')
+    expect(k1.rng.next()).toBe(k2.rng.next())
+    expect(k1.clock).toBeTruthy()
+    expect(typeof k1.bus.onLog).toBe('function')
+  })
+})
+
+describe('WorldSim 世界健康（长跑）', () => {
+  it.each(['ws-1', 'ws-2', 'ws-3'].map((s) => [s] as const))('%s：1000 月市场池/灵气在界、世界不崩', (seed) => {
+    const e = new GameEngine({ seed })
+    for (let i = 0; i < 1000; i++) {
+      if (e.view().gameOver) break
+      e.advance()
+    }
+    const ws = e.view().worldSim as (Record<string, unknown> & {
+      marketPool: Record<string, number>
+      secretQi: Record<string, number>
+      tide: number
+    }) | undefined
+    expect(ws).toBeTruthy()
+    if (ws) {
+      for (const v of Object.values(ws.marketPool)) expect(v).toBeGreaterThan(0)
+      for (const v of Object.values(ws.secretQi ?? {})) expect(v).toBeGreaterThanOrEqual(0)
+      expect(ws.tide).toBeGreaterThan(0.5)
+      expect(ws.tide).toBeLessThan(1.4)
+    }
+  })
+
+  it('NPC 换代至少发生一次（世界在演化）', () => {
+    const e = new GameEngine({ seed: 'ws-evolve' })
+    for (let i = 0; i < 720; i++) {
+      if (e.view().gameOver) break
+      e.advance()
+    }
+    const ws = e.view().worldSim as { npcSuccessions?: number } | undefined
+    expect(ws?.npcSuccessions ?? 0).toBeGreaterThan(0)
+  })
+
+  it('快讯持有且裁剪符合 N（≤120）', () => {
+    const e = new GameEngine({ seed: 'ws-news' })
+    for (let i = 0; i < 400; i++) {
+      if (e.view().gameOver) break
+      e.advance()
+    }
+    const ws = e.view().worldSim as { newsFeed?: unknown[] } | undefined
+    expect(ws?.newsFeed.length ?? 0).toBeLessThanOrEqual(WORLDSIM.newsKeep)
+  })
+})
+
+describe('Sim 与外层联动', () => {
+  it('tideMult 在界（0.5-1.4）且随年景变化', () => {
+    const e = new GameEngine({ seed: 'ws-tide-link' })
+    const sim = new WorldSim(e.world)
+    const before = sim.tideMult()
+    expect(before).toBeGreaterThanOrEqual(0.5)
+    expect(before).toBeLessThan(1.4)
+  })
+})