feat(auth): 添加忘记密码功能

- 添加忘记密码页面，支持通过邮箱重置密码
- 添加重置密码页面
- 登录页面添加忘记密码链接
- 添加邮件发送功能
- 完善所有8种语言的翻译 (en-US, zh-CN, ja-JP, ko-KR, de-DE, fr-FR, it-IT, ug-CN)

package.json

@@ -21,6 +21,7 @@
     "lucide-react": "^0.562.0",
     "next": "16.1.1",
     "next-intl": "^4.7.0",
+    "nodemailer": "^8.0.2",
     "pg": "^8.16.3",
     "react": "19.2.3",
     "react-dom": "19.2.3",
@@ -36,6 +37,7 @@
     "@eslint/eslintrc": "^3.3.3",
     "@tailwindcss/postcss": "^4.1.18",
     "@types/node": "^25.0.3",
+    "@types/nodemailer": "^7.0.11",
     "@types/react": "19.2.7",
     "@types/react-dom": "19.2.3",
     "@typescript-eslint/eslint-plugin": "^8.51.0",