feat: install and configure Inertia.js with React

- Install inertia-laravel, @inertiajs/react, react, @vitejs/plugin-react
- Add HandleInertiaRequests middleware registered in web group
- Create Inertia root template (resources/views/app.blade.php)
- Add React entry point and page components (resources/js/)
- Add Inertia demo route (/inertia-test)
- HomeController reverted to Blade (index page stays original)
- Remove inertia-test2 test route

app/Http/Kernel.php

@@ -17,6 +17,7 @@ use App\Http\Middleware\InjectPwaMeta;
 use App\Http\Middleware\InstallationMiddleware;
 use App\Http\Middleware\LocalizationMiddleware;
 use App\Http\Middleware\LogViewerMiddleware;
+use App\Http\Middleware\HandleInertiaRequests;
 use App\Http\Middleware\MaintenanceMiddleware;
 use App\Http\Middleware\PreventRequestsDuringMaintenance;
 use App\Http\Middleware\RealClientIpMiddleware;
@@ -84,6 +85,7 @@ class Kernel extends HttpKernel
             SubstituteBindings::class,
             LocalizationMiddleware::class,
             InstallationMiddleware::class,
+            HandleInertiaRequests::class,
         ],
 
         'api' => [