math_cms/app/Http/Controllers/TeacherWeeklyStatsReportController.php

<?php

namespace App\Http\Controllers;

use App\Support\TeacherWeeklyStatsReportPaths;
use Illuminate\Http\Response;
use Symfony\Component\HttpFoundation\BinaryFileResponse;

class TeacherWeeklyStatsReportController extends Controller
{
    /**
     * 浏览器内联打开最近一次生成的周报 PDF（文件名带日期与 His 时间戳）。
     */
    public function open(): BinaryFileResponse|Response
    {
        $path = TeacherWeeklyStatsReportPaths::resolveLatestPdfPath();
        if ($path === null) {
            return response(
                '尚未生成周报 PDF。请在后台「老师周报统计」页面点击「生成/刷新周报」，或执行：php artisan report:teacher-weekly-pdf',
                404
            );
        }

        $downloadName = basename($path);

        return response()->file($path, [
            'Content-Type' => 'application/pdf',
            'Content-Disposition' => 'inline; filename="'.$downloadName.'"',
        ]);
    }
}