refactor：拆分 API 路由与请求校验，统一 final 类和代码风格

routes/api/v1/admin/core.php

@@ -0,0 +1,21 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Http\Controllers\Api\V1\Admin\Audit\AuditLogIndexController;
+use App\Http\Controllers\Api\V1\Admin\Dashboard\AdminDashboardController;
+use App\Http\Controllers\Api\V1\Admin\PingController as AdminPingController;
+
+/**
+ * 管理员核心路由（需 auth:sanctum + lottery.admin）。
+ */
+
+// 连通性探测
+Route::get('ping', AdminPingController::class)->name('api.v1.admin.ping');
+
+// 首页仪表盘
+Route::get('dashboard', AdminDashboardController::class)->name('api.v1.admin.dashboard');
+
+// 审计日志
+Route::middleware('admin.permission:prd.audit.all|prd.audit.self|prd.audit.finance')
+    ->get('audit-logs', AuditLogIndexController::class)
+    ->name('api.v1.admin.audit-logs.index');