Fix ReferenceError: _ is not defined on page load

[gcharpe1604]

Description

This PR resolves the ReferenceError: _ is not defined that occurs during the initial loading of MusicBlocks. The error was caused by a race condition where some components attempted to use the translation function _ before it was fully loaded and defined.

Related Issue

Fixes #6365

PR Category

• Bug Fix — Fixes a bug or incorrect behavior
• Feature — Adds new functionality
• Performance — Improves performance (load time, memory, rendering, etc.)
• Tests — Adds or updates test coverage
• Documentation — Updates to docs, comments, or README

Changes Made

• Updated loader.js: Added logoconstants to the configuration to ensure the translation function is available before constants are initialized.
• Improved index.html: Added a defensive fallback for the translation function in the inline loading script to prevent errors if the translator loads slowly.

Testing Performed

• Ran the full automated test suite (npm test).
• Verified that all 3967 tests passed.
• Manually verified the script loading order and the defensive check in the code.

Checklist

• I have tested these changes locally and they work as expected.
• I have added/updated tests that prove the effectiveness of these changes.
• I have followed the project's coding style guidelines.
• I have run npm run lint and npx prettier --check . with no errors.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.