feat: 增加管理端多语言与多模块界面国际化支持

src/i18n/locales/en/auth.json

@@ -1,3 +1,24 @@
 {
-  "title": "Login"
+  "title": "Login",
+  "loginTitle": "Admin Login",
+  "account": "Account",
+  "accountPlaceholder": "Login account",
+  "password": "Password",
+  "passwordPlaceholder": "Password",
+  "captcha": "Captcha",
+  "captchaPlaceholder": "Enter captcha",
+  "captchaLoading": "Loading captcha",
+  "captchaRefresh": "Click to refresh captcha",
+  "captchaFetch": "Click to get captcha",
+  "apiMissingTitle": "API base URL not configured",
+  "apiMissingDescriptionPrefix": "Set",
+  "apiMissingDescriptionSuffix": "in the environment (Laravel base URL, for example http://127.0.0.1:8000).",
+  "submit": "Log in",
+  "submitting": "Signing in…",
+  "captchaLoadFailed": "Failed to load captcha. Check the API or network.",
+  "apiBaseMissingToast": "NEXT_PUBLIC_LOTTERY_API_BASE_URL is not configured",
+  "captchaRequired": "Refresh the captcha first",
+  "welcome": "Welcome, {{name}}",
+  "networkFailed": "Network request failed",
+  "loginFailed": "Login failed"
 }