All deployments

Remove unnecessary blank lines and improve readability in test cases.

Add setup methods for user authentication and improve test cases for
creating and destroying bookmarks, comments, projects, and upvotes.
Update fixture files to include usernames and additional project
attributes.

Ensure ratingCount defaults to 0 if submission count or upvotes are nil.

Implement username validation, generation, and backfilling for existing users.

Update the layout to directly include the analytics script for improved performance.

Update analytics script to use Ahrefs for improved tracking.

Integrate analytics tracking for improved data collection.

Integrate analytics script for enhanced tracking and insights.

Clean up application layout by removing the noscript GTM iframe.

Replace inline Google Analytics script with a shared partial for better maintainability.