refactor(data): update skills and about info sections

- Remove duplicate mobile frameworks (uniApp, WeChat Mini Program)
- Add React Native and Flutter to mobile skills
- Update languages and frameworks in about section
- Add backend, database and devops details to about section

src/lib/data.ts

@@ -35,14 +35,14 @@ export const personalInfo: PersonalInfo = {
     contributions: 87
   },
   skills: {
-    frontend: ["HTML", "CSS", "JavaScript", "Vue.js", "React.js", "TypeScript", "uniApp", "WeChat Mini Program"],
+    frontend: ["HTML", "CSS", "JavaScript", "Vue.js", "React.js", "TypeScript"],
     backend: ["Node.js"],
     database: ["MySQL", "MongoDB"],
-    devops: ["Linux", "Git", "Docker", "Kubernetes", "Nginx", "Apache"],
-    mobile: ["uniApp", "WeChat Mini Program"]
+    devops: ["Linux", "Git", "Docker", "Nginx", "Apache"],
+    mobile: ["React Native", "Flutter"]
   },
   terminal: {
-    username: "joy@dev-workspace" // 更新终端用户名
+    username: "joy@dev-workspace"
   }
 };