fix: restore global.Helper and global.codecept_helper lost in ESM migration

These were set in 3.x codecept.js but never ported to 4.x globals.js.
Needed for CJS helpers that use `const Helper = codecept_helper`.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: DavertMik

lib/globals.js

@@ -25,7 +25,11 @@ export async function initCodeceptGlobals(dir, config, container) {
   global.output_dir = fsPath.resolve(dir, config.output)
 
   if (config.noGlobals) return;
-    // Set up actor global - will use container when available
+
+  const HelperModule = await import('@codeceptjs/helper')
+  global.Helper = global.codecept_helper = HelperModule.default || HelperModule
+
+  // Set up actor global - will use container when available
   global.actor = global.codecept_actor = (obj) => {
     return ActorFactory(obj, container)
   }
@@ -109,6 +113,8 @@ export function getGlobalNames() {
   return [
     'codecept_dir',
     'output_dir',
+    'Helper',
+    'codecept_helper',
     'actor',
     'codecept_actor',
     'Actor',