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/SiteDashboardSiteResolver.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Services\Admin;
+
+use App\Models\AdminSite;
+use App\Models\AdminUser;
+
+/** 站点运营仪表盘：解析账号绑定的主接入站点。 */
+final class SiteDashboardSiteResolver
+{
+    public static function resolvePrimarySite(AdminUser $admin): ?AdminSite
+    {
+        $siteIds = $admin->accessibleAdminSiteIds();
+        if ($siteIds === null || $siteIds === []) {
+            return null;
+        }
+
+        return AdminSite::query()
+            ->where('id', (int) $siteIds[0])
+            ->first();
+    }
+}