feat: add translation for login messages

public/locales/de.json

@@ -8,7 +8,16 @@
         "register_prompt": "Noch keinen Account?",
         "register_link": "Registrieren",
         "welcome_notification": "Willkommen bei Maxun!",
-        "error_notification": "Benutzer existiert nicht."
+        "validation": {
+            "required_fields": "E-Mail und Passwort sind erforderlich",
+            "password_length": "Das Passwort muss mindestens 6 Zeichen lang sein"
+            },
+        "error": {
+            "user_not_found": "Benutzer existiert nicht",
+            "invalid_credentials": "Ungültige E-Mail oder Passwort",
+            "server_error": "Anmeldung fehlgeschlagen. Bitte versuchen Sie es später erneut",
+            "generic": "Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut"
+        }
     },
     "register": {
         "title": "Konto registrieren",

public/locales/en.json

@@ -8,7 +8,16 @@
       "register_prompt": "Don't have an account?",
       "register_link": "Register",
       "welcome_notification": "Welcome to Maxun!",
-      "error_notification": "User does not exist."
+      "validation": {
+        "required_fields": "Email and password are required",
+        "password_length": "Password must be at least 6 characters"
+      },
+      "error": {
+        "user_not_found": "User does not exist",
+        "invalid_credentials": "Invalid username or password",
+        "server_error": "Login failed. Please try again later",
+        "generic": "An error occurred. Please try again"
+      }
     },
     "register": {
       "title": "Register Account",

public/locales/es.json

@@ -8,7 +8,16 @@
     "register_prompt": "¿No tienes una cuenta?",
     "register_link": "Registrarse",
     "welcome_notification": "¡Bienvenido a Maxun!",
-    "error_notification": "El usuario no existe."
+    "validation": {
+      "required_fields": "El correo electrónico y la contraseña son obligatorios",
+      "password_length": "La contraseña debe tener al menos 6 caracteres"
+    },
+    "error": {
+      "user_not_found": "El usuario no existe",
+      "invalid_credentials": "Correo electrónico o contraseña inválidos",
+      "server_error": "Error al iniciar sesión. Por favor, inténtelo de nuevo más tarde",
+      "generic": "Se produjo un error. Por favor, inténtelo de nuevo"
+    }
   },
   "register": {
     "title": "Crear cuenta",

public/locales/ja.json

@@ -8,7 +8,16 @@
         "register_prompt": "アカウントをお持ちでないですか？",
         "register_link": "登録する",
         "welcome_notification": "Maxunへようこそ！",
-        "error_notification": "ユーザーが存在しません。"
+        "validation": {
+            "required_fields": "メールアドレスとパスワードは必須です",
+            "password_length": "パスワードは6文字以上である必要があります"
+        },
+        "error": {
+            "user_not_found": "ユーザーが存在しません",
+            "invalid_credentials": "メールアドレスまたはパスワードが無効です",
+            "server_error": "ログインに失敗しました。後でもう一度お試しください",
+            "generic": "エラーが発生しました。もう一度お試しください"
+        }
   },
   "register": {
         "title": "アカウントを登録する",

public/locales/zh.json

@@ -8,7 +8,16 @@
     "register_prompt": "还没有账号？",
     "register_link": "注册",
     "welcome_notification": "欢迎使用 Maxun！",
-    "error_notification": "用户不存在。"
+    "validation": {
+      "required_fields": "邮箱和密码为必填项",
+      "password_length": "密码必须至少6个字符"
+    },
+    "error": {
+      "user_not_found": "用户不存在",
+      "invalid_credentials": "邮箱或密码无效",
+      "server_error": "登录失败，请稍后重试",
+      "generic": "发生错误，请重试"
+    }
   },
   "register": {
     "title": "注册账号",