feat: enhance risk pool management and role validation

- Updated AGENTS.md to streamline information on risk pool operations and agent account restrictions.
- Introduced filtering options in AdminRiskPoolIndexController for active risk pools.
- Refactored AdminRiskPoolLockLogIndexController to support grouping by ticket or entry.
- Enhanced AdminRoleStoreController and AdminRoleUpdateController to prevent the use of reserved slugs for new roles.
- Improved error messaging for role creation and updates to clarify reserved role restrictions.
- Added new API routes for ticket item retrieval to improve admin functionalities.

lang/zh/admin.php

@@ -30,7 +30,7 @@ return [
     'player_unpaid_settlement_blocks_delete' => '该玩家仍有未结账单，请先结清或核销后再删除。',
     'player_has_tickets_blocks_delete' => '该玩家存在注单记录，无法删除。',
     'role_cannot_delete_super_admin' => '不能删除超级管理员角色。',
-    'platform_roles_fixed' => '平台仅保留「超级管理员」与「代理」两个内置角色，不支持新增。',
+    'role_slug_reserved' => '该角色编码为系统保留，请使用其他标识。',
     'role_super_admin_permissions_fixed' => '超级管理员拥有全部权限，请在权限目录变更后执行 lottery:admin-auth-sync。',
     'role_super_admin_metadata_fixed' => '超级管理员为内置角色，不支持修改名称或状态。',
     'role_builtin_cannot_delete' => '系统内置角色不允许删除。',