Fix: bootstrap.php autoload path detects vendor location (same dir vs parent dir) for flat server layout

app/bootstrap.php

@@ -4,8 +4,11 @@
  * Simple configuration for website
  */
 
-// Composer autoloader
-require_once __DIR__ . '/../vendor/autoload.php';
+// Composer autoloader (vendor/ may be sibling dir in dev or same dir in prod)
+$autoloadPath = file_exists(__DIR__ . '/vendor/autoload.php')
+    ? __DIR__ . '/vendor/autoload.php'
+    : __DIR__ . '/../vendor/autoload.php';
+require_once $autoloadPath;
 
 // Define application root
 define('APP_ROOT', __DIR__);