fix(web): avoid false default-password reminders

Only flag seeded accounts that still use the shipped password hash,
and keep auth status and password change responses stable during
review follow-up.

easytier-web/frontend-lib/src/locales/cn.yaml

@@ -377,7 +377,6 @@ web:
     change_password: 修改密码
     old_password: 旧密码
     new_password: 新密码
-    new_password_empty: 新密码不能为空
     confirm_password: 确认新密码
     language: 语言
     theme: 主题

easytier-web/frontend-lib/src/locales/en.yaml

@@ -377,7 +377,6 @@ web:
     change_password: Change Password
     old_password: Old Password
     new_password: New Password
-    new_password_empty: New password cannot be empty
     confirm_password: Confirm New Password
     language: Language
     theme: Theme