v0.12: 存档迁移钩子 + 考古日志滚动条（差异化叙事）

gameStore persist:
- name v1→v2, 加 version:2 + migrate 钩子
- migrate 合并旧存档与 INITIAL_STATE, 补全 bossKills/starTidesEncountered/
  chronicle/attributes/activeExpedition/constellation 等字段, 防旧存档崩溃
- 丢弃不可解的活跃谜题(旧算法生成)

archaeoLog.ts (新增):
- 5 阶段日志池 dawn/awakening/contact/ascension/deep (48 条)
- 按飞升次数+接触进度解锁阶段, deep 层含哲学反转
- pickLogEntry 避免短期重复(最近8条)

ArchaeoLogTicker.tsx (新增):
- marquee 横向滚动, 18-30s 随机推送新条目
- 阶段色标 emerald/amber/fuchsia/rose, inset glow
- 进度里程碑触发即时刷新(解锁新阶段)
- prefers-reduced-motion 降级

page.tsx:
- footer 上方集成 ArchaeoLogTicker

globals.css:
- echo-ticker-marquee/fade keyframes + reduced-motion 降级

调研落地: Antimatter Dimensions news ticker + Universal Paperclips 哲学递进
lint 零错误, 构建成功(5.7s)

src/store/gameStore.ts

@@ -1339,8 +1339,48 @@ export const useGameStore = create<Store>()(
       },
     }),
     {
-      name: "echo-nexus-save-v1",
+      name: "echo-nexus-save-v2",
+      version: 2,
       storage: createJSONStorage(() => localStorage),
+      // v0.12 存档迁移：旧存档（v0/v1，key=echo-nexus-save-v1）补全新增字段，防崩溃
+      migrate: (persistedState: unknown, version: number) => {
+        void version; // v0/v1 统一走合并迁移，无需分支
+        const s = (persistedState || {}) as Record<string, unknown>;
+        const base = createInitialState();
+        // 合并：以当前 INITIAL_STATE 为基底，旧存档字段覆盖，缺失字段用默认值
+        const migrated = {
+          ...base,
+          ...s,
+          // v0.8+ 新增字段兜底
+          bossKills: (s.bossKills as number) ?? 0,
+          starTidesEncountered: (s.starTidesEncountered as string[]) ?? [],
+          chronicle: (s.chronicle as unknown[]) ?? [],
+          runStart: (s.runStart as number) ?? Date.now(),
+          // v0.8.2 attributes 系统
+          attributes: (s.attributes as Record<string, number>) ?? base.attributes,
+          attributeProgress: (s.attributeProgress as unknown) ?? base.attributeProgress,
+          pendingAttrPoints: (s.pendingAttrPoints as number) ?? 0,
+          // v0.10 探险系统字段兜底
+          activeExpedition: (s.activeExpedition as unknown) ?? null,
+          totalExpeditions: (s.totalExpeditions as number) ?? 0,
+          lastExpeditionSummary: (s.lastExpeditionSummary as unknown) ?? null,
+          // 星图兜底
+          constellation: (s.constellation as string[]) ?? [],
+          pendingPerkChoices: (s.pendingPerkChoices as unknown[]) ?? [],
+          // 技术树/碎片/成就兜底（防旧存档为 undefined）
+          tech: (s.tech as Record<string, number>) ?? {},
+          fragments: (s.fragments as Record<string, boolean>) ?? {},
+          achievements: (s.achievements as Record<string, boolean>) ?? {},
+        } as GameState;
+        // 丢弃不可解的活跃谜题（旧算法生成）
+        if (migrated.activePuzzle && typeof migrated.activePuzzle === "object") {
+          const p = migrated.activePuzzle as { nodes?: unknown[] };
+          if (!p.nodes || !Array.isArray(p.nodes) || p.nodes.length === 0) {
+            migrated.activePuzzle = null;
+          }
+        }
+        return migrated;
+      },
       // 不持久化临时字段
       partialize: (s) => {
         const { _lastAutoDecode, _lastSpawn, _combo, _lastPulse, _achievementQueue, _tideEvents, globalTide, ...rest } = s;