feat(lang): 添加并扩展多语言验证和管理员提示信息

- 在英语和尼泊尔语中新增管理员相关提示‘integration_site_store_deprecated’
- 丰富了验证属性的多语言条目，覆盖更多字段及嵌套属性
- 新增验证业务规则的语言提示，补充限制和条件说明
- 扩展自定义验证消息，加入数组、邮箱、角色、返点率等多种验证提示
- 增加多个验证规则的语言描述，支持更多常见的验证类型及场景
- 尼泊尔语验证文件调整，改用多个文件合并方式加载结构
- 尼泊尔语钱包错误消息中新增代码1011的翻译描述

lang/en/validation_business.php

@@ -26,10 +26,12 @@ return [
     'exceeds_unpaid' => 'Payment amount cannot exceed the unpaid balance on this bill.',
     'invalid_range' => 'Share rate must be between 0 and 100.',
     'below_allocated' => 'Credit limit cannot be lower than credit already allocated to sub-agents.',
+    'below_player_used' => 'Player credit limit cannot be lower than the player\'s used (including frozen) amount.',
     'parent_cannot_delegate' => 'The parent has not enabled this capability.',
     'cannot_create_child_agent' => 'You are not allowed to create sub-agents.',
     'cannot_create_player' => 'You are not allowed to create players.',
     'primary_account_missing' => 'This agent has no bound login account; username cannot be updated.',
+    'site_root_exists' => 'This site already has a level-1 agent bound. Choose another site.',
     'agent_overdue' => 'This agent has overdue bills. This operation is not allowed.',
     'agent_line_severe_overdue' => 'This agent line has severe overdue (over 7 days). Betting is frozen.',
     'parent_overdue' => 'The parent agent has overdue bills. This operation is not allowed.',