feat: add captcha support for user login and enhance user profile page

- Refactored userLogin function to include captcha handling.
- Introduced getCaptchaConfig API to fetch captcha configuration.
- Added Captcha component to handle different captcha providers (hCaptcha, reCaptcha, Turnstile).
- Updated LoginForm component to integrate captcha verification.
- Created UserProfile component to display user information with avatar.
- Implemented getUserByUsername API to fetch user details by username.
- Removed deprecated LoginRequest interface from user model.
- Enhanced navbar and layout with animation effects.
- Removed unused user page component and added dynamic user profile routing.
- Updated localization files to include captcha-related messages.
- Improved Gravatar component for better avatar handling.

web/src/locales/zh-CN.json

@@ -2,6 +2,10 @@
   "HomePage": {
     "title": "Hello world!"
   },
+  "Captcha": {
+    "doing": "正在检测你是不是机器人...",
+    "success": "恭喜，你是人类！"
+  },
   "Comment": {
     "collapse_replies": "收起",
     "comment": "评论",
@@ -41,6 +45,7 @@
     "secondsAgo": "秒前"
   },
   "Login": {
+    "captcha_error": "验证错误，请重试。",
     "welcome": "欢迎回来",
     "with_oidc": "使用第三方身份提供者",
     "or_continue_with_local_account": "或使用用户名和密码",