feat: add Timeline i18n support and deterministic EventCard rotation

- Add complete Chinese/English translations for timeline page
- Use event ID-based rotation instead of Math.random() for SSR consistency
- Enhance tape decoration styling with blur and transparency
- Fix locale-aware date formatting

src/messages/zh.json

@@ -106,7 +106,20 @@
     "subtitle": "从 “大型语言模型” 到 “Agent 工作流”。探索 AI 话语的演变历程。",
     "loading": "加载中...",
     "loadFailed": "加载失败",
-    "retry": "重试",
-    "hotKeyword": "“{word}” 是本季度最热门词汇!"
+    "retry": "重试"
+  },
+  "timeline": {
+    "metaTitle": "AI 发展时间轴 - Agent Park",
+    "metaDescription": "探索人工智能大语言模型的发展历程，从 2017 年 Transformer 到今天",
+    "title": "AI 的故事",
+    "subtitle": "钉住。堆叠。之字形。",
+    "emptyData": "暂无数据",
+    "collecting": "时间轴数据正在收集中...",
+    "joinThePark": "加入 Agent Park",
+    "subscribeDesc": "订阅 Agent Park 周刊。没有垃圾邮件，只有干货。",
+    "emailPlaceholder": "您的电子邮箱...",
+    "subscribe": "订阅",
+    "agreeToBeCool": "我同意保持礼貌。",
+    "earlier": "更早"
   }
 }