Add Nextcloud OAuth 2.0 login via laravel/socialite

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

routes/web.php

@@ -1,7 +1,11 @@
 <?php
 
+use App\Http\Controllers\OAuthController;
 use Illuminate\Support\Facades\Route;
 
 Route::get('/', function () {
     return redirect('/dashboard', 301);
 });
+
+Route::get('/oauth/redirect', [OAuthController::class, 'redirect'])->name('auth.nextcloud');
+Route::get('/oauth/callback', [OAuthController::class, 'callback'])->name('auth.nextcloud.callback');