feat: enhance admin role management and reconciliation features

- Updated AGENTS.md to clarify site admin roles and their associated permissions.
- Refactored reconciliation controllers to include admin user validation and improved access control based on admin roles.
- Enhanced AdminReconcileJobService to support player-specific reconciliation and site-based job creation.
- Removed deprecated rebate commission report functionality from the API and related services.
- Improved dashboard overview builders to accommodate new site operator roles and their specific functionalities.

app/Services/Admin/SiteSettlementBillStats.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Services\Admin;
+
+use Illuminate\Support\Facades\DB;
+
+/** 站点信用账期账单摘要（待确认 / 待收付）。 */
+final class SiteSettlementBillStats
+{
+    /**
+     * @return array{
+     *     pending_confirm_count: int,
+     *     payable_count: int,
+     *     payable_unpaid_minor: int
+     * }
+     */
+    public static function forSite(int $siteId): array
+    {
+        $pendingConfirmQuery = DB::table('settlement_bills as sb')
+            ->join('settlement_periods as sp', 'sp.id', '=', 'sb.settlement_period_id')
+            ->where('sp.admin_site_id', $siteId)
+            ->where('sb.status', 'pending_confirm');
+
+        $payableQuery = DB::table('settlement_bills as sb')
+            ->join('settlement_periods as sp', 'sp.id', '=', 'sb.settlement_period_id')
+            ->where('sp.admin_site_id', $siteId)
+            ->whereIn('sb.status', ['confirmed', 'partial_paid', 'overdue'])
+            ->where('sb.unpaid_amount', '>', 0);
+
+        return [
+            'pending_confirm_count' => (int) (clone $pendingConfirmQuery)->count(),
+            'payable_count' => (int) (clone $payableQuery)->count(),
+            'payable_unpaid_minor' => (int) (clone $payableQuery)->sum('sb.unpaid_amount'),
+        ];
+    }
+}