feat: add age-based event gating, event timer, and UI polish

- Add minAge/maxAge to events so infants can't go treasure hunting
- Cache event panel DOM to prevent high-speed button destruction
- Add 10s auto-select countdown for choice events
- Fix event title/text field mapping (name/description → title/text)
- Add rotating clock icon for time flow feedback
- Fix speed/pause button active states
- Fix shop affordability check (disable + show insufficient money)
- Add red styling for unmet choice requirements
- Fix log re-rendering on every tick

src/engine/death.js

@@ -0,0 +1,173 @@
+// ==================== 死亡与结算 ====================
+
+import { state, addLog, resetStateForRebirth } from './state.js';
+import { CAREERS } from './expSystem.js';
+import { checkNewEntries as checkNewEntriesFromTalents } from '../content/talents.js';
+
+// 检查是否死亡
+export function checkDeath() {
+  if (!state.alive) return true;
+
+  // 年龄死亡
+  if (state.age >= 100) {
+    die('寿终正寝');
+    return true;
+  }
+
+  if (state.age >= 50) {
+    const deathChance = getAgeDeathChance(state.age);
+    if (Math.random() < deathChance) {
+      die('寿终正寝');
+      return true;
+    }
+  }
+
+  // 外敌死亡
+  for (const [type, progress] of Object.entries(state.enemyProgress)) {
+    if (progress >= 100 && Math.random() < 0.4) {
+      const names = { military: '死于蛮族入侵', spiritual: '被天魔吞噬', political: '王朝覆灭，死于战乱' };
+      die(names[type] || '死于外敌');
+      return true;
+    }
+  }
+
+  // 体质死亡
+  if (state.stats.body <= 0) {
+    die('体弱身亡');
+    return true;
+  }
+
+  // 危机感死亡（极端情况）
+  if (state.crisisLevel >= 100 && Math.random() < 0.3) {
+    die('在极度恐惧中精神崩溃');
+    return true;
+  }
+
+  return false;
+}
+
+function getAgeDeathChance(age) {
+  if (age < 50) return 0;
+  if (age < 60) return 0.02;
+  if (age < 70) return 0.08;
+  if (age < 80) return 0.20;
+  if (age < 90) return 0.45;
+  if (age < 100) return 0.80;
+  return 1.0;
+}
+
+// 死亡结算
+function die(reason) {
+  if (!state.alive) return;
+  state.alive = false;
+  addLog(`你死了。原因：${reason}`, 'death');
+
+  // 结算元经验
+  const metaGains = {};
+  for (const [id, career] of Object.entries(state.careers)) {
+    const config = CAREERS[id];
+    if (!config) continue;
+
+    let totalExp = career.exp;
+    for (let i = 0; i < career.level; i++) {
+      totalExp += Math.floor(config.baseExp * Math.pow(config.expCurve, i));
+    }
+
+    const gain = Math.floor(totalExp * 0.1);
+    state.metaExp[id] = (state.metaExp[id] || 0) + gain;
+    metaGains[id] = gain;
+  }
+
+  // 解锁新词条
+  const newEntries = checkNewEntriesFromTalents(state);
+  for (const entry of newEntries) {
+    state.unlockedEntries.add(entry.id);
+  }
+
+  // 外敌进度跨轮继承（保留30%）
+  for (const key of Object.keys(state.enemyProgress)) {
+    state.enemyProgress[key] = Math.min(100, state.enemyProgress[key] * 0.3 + 5);
+  }
+
+  // 触发死亡结算界面
+  if (typeof window !== 'undefined' && window.onDeath) {
+    window.onDeath({
+      reason,
+      age: state.age,
+      day: state.day,
+      careers: Object.fromEntries(
+        Object.entries(state.careers).map(([k, v]) => [k, { level: v.level, name: CAREERS[k]?.name }])
+      ),
+      metaGains,
+      newEntries,
+      history: getHistoryComparison(),
+    });
+  }
+}
+
+// 历史对比
+function getHistoryComparison() {
+  if (state.history.length === 0) return null;
+
+  const lastLife = state.history[state.history.length - 1];
+  const bestLife = state.history.reduce((best, current) =>
+    (current.age > best.age) ? current : best
+  , state.history[0]);
+
+  return {
+    vsLast: {
+      ageDiff: state.age - lastLife.age,
+      levelDiff: compareLevels(state.careers, lastLife.careers),
+    },
+    vsBest: {
+      ageDiff: state.age - bestLife.age,
+      levelDiff: compareLevels(state.careers, bestLife.careers),
+    },
+  };
+}
+
+function compareLevels(current, previous) {
+  const result = {};
+  const allIds = new Set([...Object.keys(current), ...Object.keys(previous)]);
+  for (const id of allIds) {
+    const curr = current[id]?.level || 0;
+    const prev = previous[id]?.level || 0;
+    result[id] = curr - prev;
+  }
+  return result;
+}
+
+// 重生
+export function rebirth() {
+  resetStateForRebirth();
+
+  // 随机出身
+  state.family = Math.floor(Math.random() * 4) - 1; // -1 ~ 2
+  state.stats = {
+    body: Math.floor(Math.random() * 5) + 2,  // 2~6，避免刚出生就死
+    wisdom: Math.floor(Math.random() * 5) + 2,
+    charm: Math.floor(Math.random() * 5) + 2,
+    luck: Math.floor(Math.random() * 5) + 2,
+  };
+
+  // 应用记忆效果
+  if (state.memories.includes('wisdom_boost')) state.stats.wisdom += 1;
+  if (state.memories.includes('body_boost')) state.stats.body += 1;
+
+  // 从已解锁词条池中随机抽取
+  const pool = Array.from(state.unlockedEntries);
+  state.talents = [];
+  const count = Math.min(3 + Math.floor(state.reincarnation / 10), 5);
+  for (let i = 0; i < count && pool.length > 0; i++) {
+    const idx = Math.floor(Math.random() * pool.length);
+    state.talents.push({ id: pool[idx] });
+    pool.splice(idx, 1);
+  }
+
+  addLog(`第${state.reincarnation}世开始。出身: ${state.family > 0 ? '富贵' : state.family < 0 ? '贫寒' : '普通'}人家。`);
+
+  // 触发重生事件
+  if (typeof window !== 'undefined' && window.onRebirth) {
+    window.onRebirth();
+  }
+}