v0.1.19: 八方风雨 + 孤立系统归并（双主线，1002 全绿）

【主线一：世界自演进深化《八方风雨》】
- NPC 战略姿态 stance：守成/扩张/隐忍/结盟四态，年首评估（era>景气>power>relation）
  全行为调制：raid 概率×2/×0.4/×0、互攻阈值 -40/-70/不攻、贸量 ×1.3/×0.7、
  赠礼收益 ally×1.3、结盟门槛 ally 放宽至30——NPC 从统计物理到行为战略
- 超卖潮（谷贱伤农）：池>1.8×base 世界产能回调×0.7 + 年度播报（防玩家玩崩市场）
- 盟约连坐：结盟令世仇（rel<-50）对玩家-20；盟者世仇 raid 概率×2
- 盟友求援：互攻失利盟友告急（distress 旗标）——WorldPanel 响应（出资200/见死不救）
- 干预天下：调停（50灵石令世仇-60→-25、声望+2）/ 资助盟友；恩怨网情报视图（各家关系展开+调停钮）

【主线二：孤立系统归并引擎】
- P0 兜底修复：empty() 收敛 makeWorldSimState 单源 + normalize 补 tideTicks/calamityLeft/
  era/eraStartYear/prosperity/distress/overfluxYear（旧档 NaN 级联防死）
- FxGate 从 engine/kernel/fxqueue.ts 并入 ui/fx.ts（kernel 清纯引擎；deltas 顶层导出，
  3 处引用 10 行改动）；engine 侧零 UI 依赖再下一城
- 音效语义补充：onFx→blade/pulse/spark→sWar/sGong/sBell；onLog kind 兜底保留（不静音）
- store.advance drift/season 段左移 fx.ts（fxSeason 复活接管 season 检测）
- 死码清除：timesense.tideOf/tintLabel、tideDir 全链（类型/初始/写入/domain）
- domain.ts worldSim 局部类型补全 0.1.18/0.1.19 全部新字段（断言类型安全）

【测试】1002 全绿（41 套件）：stance-world 7 例（兜底/姿态/raid/超卖/连坐/调停/求援）

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

@@ -89,6 +89,18 @@ export function normalizeGameState(state: GameState): GameState {
     state.worldSim.secretQi = state.worldSim.secretQi ?? {}
     state.worldSim.newsFeed = state.worldSim.newsFeed ?? []
     if (typeof state.worldSim.tide !== 'number') state.worldSim.tide = 0.5
+    if (typeof state.worldSim.tideTicks !== 'number') state.worldSim.tideTicks = 0
+    if (typeof state.worldSim.npcSuccessions !== 'number') state.worldSim.npcSuccessions = 0
+    if (typeof state.worldSim.calamityLeft !== 'number') state.worldSim.calamityLeft = 0
+    if (state.worldSim.era !== 'shengshi' && state.worldSim.era !== 'pingshi' && state.worldSim.era !== 'luanshi' && state.worldSim.era !== 'mofa') {
+      state.worldSim.era = 'pingshi'
+      state.worldSim.eraStartYear = 1
+    }
+    for (const dyn of Object.values(state.worldSim.npcDyn)) {
+      if (dyn && typeof (dyn as { prosperity?: unknown }).prosperity !== 'number') {
+        (dyn as { prosperity: number }).prosperity = 50
+      }
+    }
   }
   if (state.family.headId && !state.members[state.family.headId]) {
     const firstAlive = Object.values(state.members).find((c) => c.alive)
@@ -451,11 +463,47 @@ export class World {
 
   // ==================== player actions ====================
 
+  /** 盟友求援响应：捐灵石助其重整武备（power+15、关系+8） */
+  assistAlly(npcId: string, cost = 200): boolean {
+    const fam = this.state.family
+    const ws = this.state.worldSim as { distress?: { id: string } } | undefined
+    if (!ws?.distress || ws.distress.id !== npcId) return false
+    if (fam.stones < cost) return false
+    fam.stones -= cost
+    const npc = this.state.npcFamilies[npcId]
+    if (!npc) return false
+    npc.power = Math.min(900, npc.power + 15)
+    npc.relation = Math.min(100, npc.relation + 8)
+    fam.reputation += 3
+    ws.distress = undefined
+    this.log('good', `驰援${npc.name}——敌锋既退，盟谊愈坚（声望+3）。`)
+    this.chronicle('diplomacy', `助${npc.name}重整武备，同盟益固。`, undefined, true)
+    return true
+  }
+
+  /** 调停战端：耗灵石五十，令两家罢兵三年（关系回暖至可容忍线） */
+  mediateNpcs(npcA: string, npcB: string, cost = 50): boolean {
+    const fam = this.state.family
+    const dyns = this.state.worldSim?.npcDyn as Record<string, { relationsWithOthers: Record<string, number> }> | undefined
+    if (!dyns?.[npcA]?.relationsWithOthers || dyns[npcA].relationsWithOthers[npcB] === undefined) return false
+    if (fam.stones < cost) return false
+    fam.stones -= cost
+    for (const [a, b] of [[npcA, npcB], [npcB, npcA]] as const) {
+      const rel = dyns[a].relationsWithOthers[b]
+      if (rel < -30) dyns[a].relationsWithOthers[b] = -25
+    }
+    fam.reputation += 2
+    this.log('info', `调停${this.state.npcFamilies[npcA]?.name ?? npcA}与${this.state.npcFamilies[npcB]?.name ?? npcB}——干戈化玉帛，声望+2。`)
+    return true
+  }
+
   setAlliance(npcId: string, on: boolean): boolean {
     const npc = this.state.npcFamilies[npcId]
     if (!npc) return false
     if (on) {
-      if (npc.relation < 40) return false
+      const stA = (this.state.worldSim?.npcDyn?.[npcId] as { stance?: string } | undefined)?.stance
+      const need = stA === 'ally' ? 30 : 40
+      if (npc.relation < need) return false
       npc.allied = true
       npc.alliedSinceYear = this.state.year
       npc.power = Math.min(900, npc.power + 10)
@@ -465,6 +513,19 @@ export class World {
           dyn.relationsWithOthers[npcId] = Math.max(-100, (dyn.relationsWithOthers[npcId] ?? 0) - 3)
         }
       }
+      // 0.1.19 盟约连坐：其世仇恼我结盟，两邦关系走冷
+      const dyn = (this.state.worldSim?.npcDyn as Record<string, { relationsWithOthers: Record<string, number> }> | undefined)?.[npcId]
+      if (dyn) {
+        for (const [oid, rel] of Object.entries(dyn.relationsWithOthers)) {
+          if (rel < -50) {
+            const foeNpc = this.state.npcFamilies[oid]
+            if (foeNpc) {
+              foeNpc.relation = Math.max(-100, foeNpc.relation - 20)
+              this.log('info', `${foeNpc.name} 见我已与${npc.name}结盟，心怀芥蒂，关系-20。`)
+            }
+          }
+        }
+      }
       this.log('good', `与${npc.name}结成同盟——盟誓既立，互不犯边。`)
       this.chronicle('diplomacy', `本族与${npc.name}缔结同盟。`, undefined, true)
       return true