Fix: Add html() method to Response class

backend/app/Core/Response.php

@@ -58,6 +58,25 @@ class Response
         exit;
     }
 
+    /**
+     * Send HTML response and terminate execution
+     *
+     * @param string $html
+     * @param int $code
+     * @return void
+     */
+    public function html(string $html, int $code = 200): void
+    {
+        $this->setStatusCode($code);
+        $this->setHeader('Content-Type', 'text/html; charset=utf-8');
+        
+        $this->sendHeaders();
+        http_response_code($this->statusCode);
+
+        echo $html;
+        exit;
+    }
+
     /**
      * Send success JSON response
      */