feat(project): add project deletion functionality with confirmation dialog

[Sithumli]

What changed

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• Added DELETE API endpoint at /api/admin/projects/[projectId]/delete
• Added cascade deletion of all related records (details, status, associations, slides, team, social links)
• Added Azure blob storage cleanup for project images (cover, logo, team profiles)
• Added DeleteProjectDialog confirmation component with warning message
• Added useDeleteProject hook for delete state management
• Added trash icon button in RejectedProjectsTable (visible to ADMIN only)
• Integrated delete flow in admin projects page with toast notifications

Why

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• Rejected projects currently remain in the database indefinitely
• Administrators need a way to clean up rejected submissions and free storage
• Related blob storage images were never cleaned up, causing unnecessary storage costs

Scope

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• Admin projects management page (/admin/projects)
• Rejected projects tab and table component
• New API endpoint for project deletion
• Blob storage cleanup utility

Addressed Review Comments (from PR #204)

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• API uses session.user.role for authorization (version-2 pattern)
• Only REJECTED projects can be deleted (status validation)
• Server-only env vars for Azure SAS token
• Blob name extraction handles virtual folders (slice(1).join('/'))
• Promise.allSettled for reliable blob cleanup in serverless
• Dialog prevents dismiss while delete is in progress
• aria-label on delete button for accessibility
• DialogDescription uses asChild with <div> for valid HTML
• Try/catch in handleConfirmDelete for error handling

Testing performed

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• Verified delete button appears only for ADMIN users
• Confirmed project and all related records removed from database
• Verified blob storage cleanup triggers correctly
• Tested dialog cannot be dismissed during deletion
• Verified UI updates after successful deletion

Closes #54

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Pull request overview

Adds an admin-only “delete rejected project” flow across the admin UI and backend API, including database cleanup and Azure Blob Storage image deletion, to allow permanent removal of rejected submissions.

Changes:

• Introduces DELETE /api/admin/projects/[projectId]/delete to delete a rejected project and related records, plus blob cleanup.
• Adds a reusable DeleteProjectDialog confirmation modal and a useDeleteProject hook to manage delete state.
• Wires the delete action into the rejected-projects table (trash button) and the admin projects page with toast feedback.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
hooks/project/useDeleteProject.ts	New hook to call the admin delete endpoint and expose loading/error state.
components/tables/RejectedProjectsTable.tsx	Adds optional delete action button (admin-only via props) with tooltip + aria-label.
components/dialogs/DeleteProjectDialog.tsx	New confirmation dialog that blocks dismissal while deletion is in progress.
app/api/admin/projects/[projectId]/delete/route.ts	New DELETE route: validates admin + rejected status, deletes related DB rows, and cleans up Azure blobs.
app/(admin)/admin/projects/page.tsx	Integrates delete dialog + hook into the rejected tab with toast notifications and refresh.

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[agzaiyenth]

can we also add audit logging?

[agzaiyenth]

can we also add audit logging?
Not as logs, rather as a audit itself.

[zionashirwada]

@agzaiyenth isn't this ready to merge ?

[agzaiyenth]

@agzaiyenth isn't this ready to merge ?

nah zion, not 100% comfortable merging this yet tbh
main concerns:
what if a moderator accidentally deletes a project
what if we delete a project and later there’s a ticket raised on it (like submission issue, rejection, etc.)

thinking better approach is:
only allow delete for REJECTED projects
and only if rejected date > 2 weeks

also with the new portal coming, students can edit their own projects anyway, so this whole delete/edit pressure should reduce a lot 👍

@zionashirwada wdyt