Fix missing tree-massactions.js file for admin orders mass actions

[Hawksama]

Error Details

Error Message:

[2025-09-07 12:43:31] [ERROR] Failed to load the "Magento_Sales/js/grid/tree-massactions" component.

When it occurs:

• When accessing the admin orders page
• Specifically affects the mass actions functionality in the orders grid
• Appears in browser console

Solution

Added the missing tree-massactions.js file with the complete implementation that:

1. Extends the base Massactions component from Magento_Ui/js/grid/massactions
2. Implements tree-specific functionality including:
   • Recursive observation of nested actions
   • Submenu visibility management
   • Hierarchical action handling
   • Parent-child relationship management

Testing

✅ Admin orders page loads without 404 errors
✅ Mass actions dropdown functions correctly
✅ Hierarchical actions display and operate properly
✅ No JavaScript console errors