Judge email invites

[ReehalS]

Judge Email invites

The Template and template image pending change sometime in the future.
Infrastructure for parsing and sending for mentors is set up already.
Will work on that once merged.

Tested with 5 emails sent in ~2-3 seconds overall, estimate 1 batch of 10 emails sent to be ~3.5 seconds.

[Copilot]

Pull request overview

This pull request implements an email invitation system for judges to join the HackDavis 2026 Hub. It replaces the previous invite-link page with a comprehensive invitation system that supports both single and bulk judge invitations via CSV upload, utilizing nodemailer with connection pooling for efficient email delivery.

Changes:

• Added type definitions for judge invite data structures and response types
• Implemented single and bulk judge invitation forms with CSV parsing and preview functionality
• Created email transporter configuration with connection pooling and HMAC-signed invite link generation
• Replaced the generic invite-link page with a dedicated invite-judges interface

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
app/_types/emails.ts	Defines TypeScript interfaces for judge invitation data, results, and responses
app/(pages)/admin/page.tsx	Updates admin navigation to point to new invite-judges route
app/(pages)/admin/invite-link/page.tsx	Removes old generic invite link page component
app/(pages)/admin/invite-link/invite.module.scss	Removes old invite page styles
app/(pages)/admin/invite-judges/page.tsx	New page with single and bulk judge invitation forms
app/(pages)/admin/_components/JudgeInvites/JudgeSingleInviteForm.tsx	Form component for sending individual judge invitations
app/(pages)/admin/_components/JudgeInvites/JudgeBulkInviteForm.tsx	Form component with CSV upload, preview, and batch sending
app/(api)/_actions/emails/transporter.ts	Configures nodemailer transporter with connection pooling
app/(api)/_actions/emails/sendSingleJudgeHubInvite.ts	Server action to create and send single judge invitation
app/(api)/_actions/emails/sendBulkJudgeHubInvites.ts	Server action for batched sending with concurrency control
app/(api)/_actions/emails/parseInviteCSV.ts	Server-side CSV parser with validation using csv-parse and zod
app/(api)/_actions/emails/emailFormats/2026JudgeHubInviteTemplate.ts	HTML email template for 2026 judge invitations

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[ReehalS]

The emails sent right now will not contain viewable headers/footers since the image for them isn't deployed yet. Once this is on prod/staging it will start working as intended.