feat: 添加仪表盘接口，聚合财务、风控和待办计数，增强管理员 API 路由功能

app/Http/Controllers/Api/V1/Admin/Dashboard/AdminDashboardController.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\Admin\Dashboard;
+
+use App\Http\Controllers\Controller;
+use App\Lottery\ErrorCode;
+use App\Models\AdminUser;
+use App\Services\Admin\AdminDashboardSnapshotBuilder;
+use App\Support\ApiResponse;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+/**
+ * GET /api/v1/admin/dashboard — 首页仪表盘聚合数据（需登录；按权限返回子块）。
+ */
+final class AdminDashboardController extends Controller
+{
+    public function __construct(
+        private readonly AdminDashboardSnapshotBuilder $dashboard,
+    ) {}
+
+    public function __invoke(Request $request): JsonResponse
+    {
+        $admin = $request->lotteryAdmin();
+        if (! $admin instanceof AdminUser) {
+            return ApiResponse::error(
+                trans('admin.unauthenticated', [], $request->lotteryLocale()),
+                ErrorCode::AdminUnauthenticated->value,
+                null,
+                401,
+            );
+        }
+
+        return ApiResponse::success($this->dashboard->build($admin));
+    }
+}