feat(agent-profile): 限制代理及玩家返点和分成范围，增强权限校验

- 添加ensureSuperAdmin方法，限制管理员设置操作权限
- 在AdminSettingController接口中新增权限检查，防止非超级管理员操作
- AdminPlayerIndexController新增direct agent筛选支持
- AdminPlayerUpdateController新增对信用玩家默认币别变更的拒绝逻辑
- 新增WalletSettlementBillsController，实现玩家信用盘账期账单摘要接口
- AgentProfileService调整，新增返点限额和分享比例自动下调机制，保持子代理及玩家配置不超父级
- AgentProfileService增加can_grant_extra_rebate权限继承限制，阻止无权限代理开启
- AgentSettlementPeriodCloseService增加玩家账单回水信用释放逻辑，确保信用额度同步
- PlayerCreditService新增释放账单回水对应信用逻辑，维护账期信用一致性
- TicketPlacementService和TicketPreviewService新增信用玩家投注币别匹配校验，防止币别不符
- PlayerLedgerLogsService优化信用额度计算，增加可用额度上下限限制，防止负值和超限
- 调整后台管理导航，仅超管可见设置入口，强化权限隔离
- 路由新增玩家信用账单查询接口
- 补充多项AgentProfile相关单元测试覆盖额度限制、返点继承、返点下调场景及权限限制
- 增加站点管理员登录测试，验证系统设置菜单不可见，提升用户权限体验

tests/Feature/AgentPeriodCloseFromGameSettlementTest.php

@@ -138,6 +138,9 @@ test('period close aggregates share ledger written by game settlement recorder',
     expect($recorder->shouldRecord($item))->toBeTrue();
 
     $recorder->recordForTicketItem($item, 0, 'settled_lose');
+    DB::table('player_credit_accounts')
+        ->where('player_id', $player->id)
+        ->update(['used_credit' => \App\Support\CreditAmountScale::minorToMajor($betMinor, 'NPR')]);
 
     $item->refresh();
     expect($item->agent_settled_at)->not->toBeNull()
@@ -168,9 +171,26 @@ test('period close aggregates share ledger written by game settlement recorder',
         ->where('owner_id', $player->id)
         ->first();
 
+    $usedAfterClose = (int) DB::table('player_credit_accounts')
+        ->where('player_id', $player->id)
+        ->value('used_credit');
+    $rebateCreditLedger = DB::table('credit_ledger')
+        ->where('owner_type', 'player')
+        ->where('owner_id', $player->id)
+        ->where('reason', 'rebate_in_bill')
+        ->where('ref_type', 'settlement_bill')
+        ->where('ref_id', $playerBill->id ?? 0)
+        ->first();
+
     expect($playerBill)->not->toBeNull()
         ->and((int) $playerBill->gross_win_loss)->toBe($betMinor)
-        ->and((int) $playerBill->rebate_amount)->toBeGreaterThan(0);
+        ->and((int) $playerBill->rebate_amount)->toBeGreaterThan(0)
+        ->and($rebateCreditLedger)->not->toBeNull()
+        ->and((int) $rebateCreditLedger->amount)->toBe((int) $playerBill->rebate_amount)
+        ->and($usedAfterClose)->toBe(
+            \App\Support\CreditAmountScale::minorToMajor($betMinor, 'NPR')
+            - \App\Support\CreditAmountScale::minorToMajor((int) $playerBill->rebate_amount, 'NPR'),
+        );
 });
 
 test('credit settlement records base rebate plus add-on rebate and keeps extra rebate separate', function (): void {