Added: No-header layout, signup/signin link enhancements, and header design updates

core/Controller.php

@@ -16,8 +16,8 @@ class Controller {
      * @param string $viewName
      * @param array $data
      */
-    public function view($viewName, $data = []) {
+    public function view($viewName, $data = [], $layout = "base") {
         $view = new View();
-        $view->render($viewName, $data);
+        $view->render($viewName, $data, $layout);
     }
 }

core/Router.php

@@ -78,7 +78,7 @@ class Router {
         } else {
             http_response_code(404);
             $view = new View();
-            $view->render('errors/404');
+            $view->render('errors/404', [], 'noheader');
         }
     }
 }