Update single.html: Add provider and comments info for non-production

[JUD210]

• Enhanced the comments section logic in single.html to provide detailed feedback during development.
• Displays the current comments provider and configuration status when running in a non-production environment.
• Added fallback messages for scenarios where comments are disabled or no provider is specified.
• Ensures clarity for debugging comments setup without affecting production behavior.
• Tested thoroughly to confirm:
  1. Proper display of provider and configuration in non-production environments.
  2. Production environment behavior remains unaffected.
  3. Comprehensive handling of cases with missing or disabled comments.

This is an enhancement or feature.

Summary

Enhanced the comments section in single.html to display provider and configuration details during development. This provides useful debugging information in non-production environments without affecting production behavior.

Context

This PR addresses the need for clearer feedback when debugging comments functionality in local and non-production environments. No related GitHub issues were found, but this improvement enhances the developer experience.

Changes

• Added logic to single.html to display debug information when running in non-production environments.
• Displays the comments provider and status in development.
• Added fallback messages for missing or disabled comments configuration.

Additional Notes

• Tested thoroughly in the following scenarios:
  1. Non-production environment with valid comments provider and enabled comments.
  2. Non-production environment with no provider or disabled comments.
  3. Production environment to ensure no changes in behavior.