refactor: reorganize project structure and improve type definitions

- Split types into separate modules for better organization
- Move data files to dedicated directories with proper documentation
- Enhance i18n utilities with better type safety and performance
- Maintain backward compatibility with legacy imports

src/lib/data/personal-info.ts

@@ -0,0 +1,55 @@
+/**
+ * Personal information data module
+ * Contains all personal information used throughout the site
+ */
+import type { PersonalInfo } from '@/types';
+
+/**
+ * Personal information data
+ * This data is used in various components like Header, Footer, and About sections
+ */
+export const personalInfo: PersonalInfo = {
+  name: "Joy Zhao",
+  location: "China",
+  avatar: "https://avatars.githubusercontent.com/u/24975063?v=4",
+  email: "zhaoguiyang18@gmail.com",
+  github: "https://github.com/zguiyang",
+  linkedin: "https://linkedin.com/in/zhaoguiyang",
+  website: "https://zhaoguiyang.com",
+  twitter: "https://twitter.com/zhaoguiyang",
+  position: {
+    en: "Full Stack Engineer",
+    zh: "全栈工程师"
+  },
+  description: {
+    en: "Crafting elegant solutions to complex problems with clean code and innovative thinking. Welcome to my personal dev workspace where ideas come to life.",
+    zh: "用优雅的代码和创新的思维，为复杂问题打造精致的解决方案。欢迎来到我的个人开发工作空间，这里是想法变为现实的地方。"
+  },
+  about: {
+    en: [
+      "I started my programming journey in 2016 when I accidentally encountered programming. This opportunity became the catalyst for my coding adventure, and I fell in love with programming during my subsequent self-learning journey.",
+      "I enjoy creating websites and applications with code and sharing them with users. The sense of achievement I get from this process makes me increasingly fascinated. My dream is to become a lifelong coder.",
+      "I love reading, traveling (especially road trips), enjoying various cuisines (particularly hot pot), and playing mobile games like League of Legends, Honor of Kings, and PUBG Mobile."
+    ],
+    zh: [
+      "在2016年一次偶然的机会中接触到了编程，以此为契机，开始了我的编程之旅，并在后续的自学之旅中爱上了编程。",
+      "我喜欢用代码编写出一个个的网页、应用，分享给用户使用，这其中获得的成就感让我愈发着迷。梦想是成为一名终身编码者。",
+      "热爱生活、阅读以及编程，寻找远程工作的机会，探索自由职业的可能性。喜欢自驾，去追寻那些美丽的风景，尝试新的事物。"
+    ]
+  },
+  stats: {
+    repositories: 152,
+    commits: "42K",
+    contributions: 87
+  },
+  skills: {
+    frontend: ["HTML", "CSS", "JavaScript", "Vue.js", "React.js", "TypeScript"],
+    backend: ["Node.js"],
+    database: ["MySQL", "MongoDB"],
+    devops: ["Linux", "Git", "Docker", "Nginx", "Apache"],
+    mobile: ["React Native", "Flutter"]
+  },
+  terminal: {
+    username: "joy@dev-workspace"
+  }
+};