test: 测试矩阵扩至 161 项（深度审计 + 5 处缺陷修复）

新增测试矩阵（12 文件 / 161 cases）：
- rng 12 / data 18 / pcgen+cultivation 20 / economy 12 / combat+missions 24
- marriage+diplomacy 13 / events 12 / world+lifecycle 8（含镜像一致）/ save 4+5 / audit 8

审计带出并修复的真实缺陷：
1. Rng.pick 空数组未报错（防空白数组进而崩溃难查）
2. combatPowerOf 未应用功法悟道品阶战力加成（0.1.2 设计缺口）
3. 重伤者即使不代表伤状态仍按满速修炼（health 进修炼公式）
4. 寡妇/鳏夫无法再婚：候选列表放着人执行层却拒婚（spouseId 死旧契约）
5. isWidowed 参数契约陷阱：传 id 静默 false（升级接受 Character|Id 双签名）

tests/save-ext.test.ts

@@ -0,0 +1,145 @@
+import { describe, expect, it } from 'vitest'
+import { SaveSlot, SaveDbDriver } from '../src/renderer/game/storage/slots'
+import { World } from '../src/renderer/game/engine/world'
+
+interface Row {
+  [k: string]: unknown
+}
+
+class MemoryDriver implements SaveDbDriver {
+  tables = new Map<string, Map<string, Row>>()
+
+  async open(_name: string): Promise<void> {}
+
+  async close(): Promise<void> {}
+
+  async run(sql: string, params: unknown[] = []): Promise<unknown> {
+    const ins = /insert into (\w+)\s*\(([^)]+)\)\s*values\s*\(([^)]+)\)/i.exec(sql)
+    if (ins) {
+      const cols = ins[2].split(',').map((c) => c.trim())
+      const row: Row = {}
+      cols.forEach((c, i) => (row[c] = params[i]))
+      const t = this.tables.get(ins[1]) ?? new Map<string, Row>()
+      t.set(String(row['id'] ?? ins[1] + t.size), row)
+      this.tables.set(ins[1], t)
+    }
+    const upd = /update\s+(\w+)\s+set/i.exec(sql)
+    if (upd) {
+      const setCol = /set\s+(\w+)\s*=\s*\?/i.exec(sql)![1]
+      const setVal = params[0]
+      const lit = /\bwhere\s+(\w+)\s*=\s*'([^']+)'/i.exec(sql)
+      const ph = /where\s+(\w+)\s*=\s*\?/i.exec(sql)
+      const col = (lit?.[1] ?? ph?.[1]) as string
+      const val = (lit?.[2] as string | undefined) ?? String(params[1])
+      const t = this.tables.get(upd[1])
+      if (t) {
+        for (const [k, row] of t.entries()) {
+          if (String(row[col]) === val) t.set(k, { ...row, [setCol]: setVal })
+        }
+      }
+    }
+    const del = /delete from (\w+)\s+where\s+(\w+)\s*=\s*\?/i.exec(sql)
+    if (del) {
+      const t = this.tables.get(del[1])
+      if (t) {
+        for (const [k, row] of t.entries()) {
+          if (String(row[del[2]]) === String(params[0])) t.delete(k)
+        }
+      }
+    }
+    return null
+  }
+
+  async all<T>(sql: string, params: unknown[] = []): Promise<T[]> {
+    const lower = sql.toLowerCase()
+    const table = /from (\w+)/i.exec(sql)?.[1]
+    if (!table) return []
+    let rows = [...(this.tables.get(table)?.values() ?? [])].map((r) => ({ ...r }))
+    if (/\bwhere\b/.test(lower)) {
+      const m = /where\s+(\w+)\s*=\s*\?/i.exec(sql)
+      if (m && params[0] !== undefined) {
+        rows = rows.filter((r) => String(r[m[1]]) === String(params[0]))
+      }
+    }
+    if (/\border by/i.test(lower)) {
+      rows = rows.sort((a, b) => Number(b['year']) - Number(a['year']) || Number(b['month']) - Number(a['month']))
+    }
+    if (/select data/i.test(lower)) rows = rows.map((r) => ({ data: String(r['data']) }))
+    if (/select value/i.test(lower)) rows = rows.map((r) => ({ value: String(r['value']) }))
+    return rows as T[]
+  }
+
+  async exec(sql: string): Promise<unknown> {
+    const create = /create table (?:if not exists )?(\w+)/i.exec(sql)
+    if (create && !this.tables.has(create[1])) this.tables.set(create[1], new Map())
+    const del = /delete from (\w+)/i.exec(sql)
+    if (del) this.tables.set(del[1], new Map())
+    return null
+  }
+}
+
+function world(seed: string) {
+  return World.create({ seed, surname: '楚', familyName: '楚家', motto: 'm', difficulty: 'normal' })
+}
+
+describe('SaveSlot 存储扩展', () => {
+  it('snapshot 保留最近 12 份并淘汰最旧', async () => {
+    const driver = new MemoryDriver()
+    const file = new SaveSlot(9, driver)
+    const w = world('st-9')
+    for (let i = 0; i < 20; i++) {
+      w.state.year = i + 1
+      await file.saveState(w.state, 'x')
+    }
+    const snaps = await file.listSnapshots()
+    expect(snaps.length).toBe(12)
+    expect(snaps[0].year).toBe(20)
+  })
+
+  it('wipe 后库中没有快照与 meta', async () => {
+    const driver = new MemoryDriver()
+    const file = new SaveSlot(10, driver)
+    await file.saveState(world('st-10').state, 'x')
+    await file.wipe()
+    const state = await file.loadState()
+    expect(state).toBeNull()
+  })
+
+  it('非法 json 导入返回 false 且原数据不动', async () => {
+    const driver = new MemoryDriver()
+    const file = new SaveSlot(11, driver)
+    await file.saveState(world('st-11').state, 'x')
+    const ok = await file.importAll('not json at all')
+    expect(ok).toBe(false)
+    const still = await file.loadState()
+    expect(still).toBeTruthy()
+  })
+
+  it('export→import 完全恢复（含 rng 状态推进一致）', async () => {
+    const driver = new MemoryDriver()
+    const file = new SaveSlot(12, driver)
+    const w = world('st-12')
+    for (let i = 0; i < 10; i++) w.advanceMonth()
+    w.syncRng()
+    await file.saveState(w.state, 'y')
+    const json = await file.exportAll()
+    const d2 = new MemoryDriver()
+    const f2 = new SaveSlot(12, d2)
+    await f2.importAll(json)
+    const restored = await f2.loadState()
+    expect(restored?.totalTicks).toBe(10)
+    // 此后推进与原始世界分叉前提一致（同 rng 同初始 = 同序列）
+    const w2 = new World(restored!)
+    w.advanceMonth()
+    w2.advanceMonth()
+    expect(w2.state.family.stones).toBe(w.state.family.stones)
+  })
+})
+
+// 修正语法：listSnapshots async
+declare global {
+  // eslint-disable-next-line @typescript-eslint/no-namespace
+  namespace NodeJS {
+    interface ProcessEnv {}
+  }
+}