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）

src/renderer/game/engine/world.ts

@@ -414,9 +414,10 @@ export class World {
     return true
   }
 
-  isWidowed(member: Character): boolean {
-    if (!member.spouseId) return false
-    const sp = this.state.members[member.spouseId]
+  isWidowed(member: Character | Id): boolean {
+    const m = typeof member === 'string' ? this.state.members[member] : member
+    if (!m || !m.spouseId) return false
+    const sp = this.state.members[m.spouseId]
     return !!sp && !sp.alive
   }
 
@@ -461,10 +462,18 @@ function w2age(w: World, c: Character): number {
   return w.ageOf(c)
 }
 
+function widowedOf(w: World, m: Character): boolean {
+  if (!m.spouseId) return false
+  const sp = w.state.members[m.spouseId]
+  return !!sp && !sp.alive
+}
+
 function arrangeWeddingPublic(w: World, aId: Id, bId: Id): boolean {
   const a = w.memberById(aId)
   const b = w.memberById(bId)
-  if (!a.alive || !b.alive || a.spouseId || b.spouseId) return false
+  if (!a.alive || !b.alive) return false
+  if (a.spouseId && !widowedOf(w, a)) return false
+  if (b.spouseId && !widowedOf(w, b)) return false
   if (a.gender === b.gender) return false
   if (a.fatherId && a.fatherId === b.fatherId) return false
   if (a.motherId && a.motherId === b.motherId) return false