Fix Laravel 5.5 compatibility issues - view helpers, collections, and auth routes

- Replace {{ url() }} with {{ url('/') }} in all blade templates to fix object-to-string conversion errors
- Update TeamStoreModel::selectTeamStoreGroupByCartKey() to use first() instead of get() for Laravel 5.5 Collections
- Fix TeamStoreController to access object properties directly instead of using array syntax [0]
- Update authentication routes to use Laravel 5.5 method names (showLoginForm, login, logout)
- Update login/register links from /auth/login to /login throughout views (navbar, app, auth pages)
- Verify cart, login, and register pages working with HTTP 200 status

app/Providers/EventServiceProvider.php

@@ -19,12 +19,11 @@ class EventServiceProvider extends ServiceProvider {
 	/**
 	 * Register any other events for your application.
 	 *
-	 * @param  \Illuminate\Contracts\Events\Dispatcher  $events
 	 * @return void
 	 */
-	public function boot(DispatcherContract $events)
+	public function boot()
 	{
-		parent::boot($events);
+		parent::boot();
 
 		//
 	}