KTVRemote/app/Livewire/Pages/Home.php

<?php

namespace App\Livewire\Pages;

use Livewire\Component;

class Home extends Component
{
    public $roomCode;

    public function mount()
    {
        // 先從 URL 取得 room_code，再存進 session
        //session()->forget('room_code');
        $this->roomCode = request()->query('room_code', session('room_code', null));
        if ($this->roomCode) {
            session(['room_code' => $this->roomCode]);
        }
    }

    public function render()
    {
        return view('livewire.pages.home');
    }
}