Update registration email templates to use the new Discord invite link

[Copilot]

Registration emails were still sending users to an outdated Discord invite URL. This updates all registration email sources so Gmail-delivered confirmation content consistently points to the new server invite.

• Scope of change

  • Updated Discord invite URL in Apps Script plain-text email body:
    • /apps-script/Email.gs
  • Updated Discord invite URL in Apps Script HTML registration template:
    • /apps-script/RegistrationEmail.html
  • Updated Discord invite URL in backend HTML registration template:
    • /Front-end/backend/templates/RegistrationEmail.html

• Resulting behavior

  • All registration email variants (HTML + text, Apps Script + backend template path) now reference the same invite link: https://discord.gg/PSnanAxagX.

<!-- before -->
<a class="button" href="https://discord.gg/HfzJZHJNxK">Join Discord</a>

<!-- after -->
<a class="button" href="https://discord.gg/PSnanAxagX">Join Discord</a>

[Copilot]

Pull request overview

This pull request updates the Discord invite URL used in registration confirmation emails so that all email variants (Apps Script HTML + plain text, and the backend HTML template) consistently direct users to the new server invite link.

Changes:

• Updated the Discord invite link in the backend HTML registration email template.
• Updated the Discord invite link in the Apps Script HTML registration email template.
• Updated the Discord invite link in the Apps Script plain-text email body.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
Front-end/backend/templates/RegistrationEmail.html	Updates the Discord invite button URL to the new invite link.
apps-script/RegistrationEmail.html	Updates the Discord invite button URL to the new invite link in the Apps Script HTML template.
apps-script/Email.gs	Updates the plain-text Discord invite URL to the new invite link.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.