Frontend: Add export to calendar

[Smartdevs17]

Problem

No way to add deadlines to calendar.

Proposed Solution

Add calendar export.

Acceptance Criteria

• Generate .ics file
• Include project deadlines
• Include milestone dates
• Add to calendar button

Technical Notes

• Files: frontend/app/dashboard/projects/[id]/page.tsx

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[KingDavid9999]

@KingDavid9999 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

With my hands-on experience integrating calendar export features in React dashboards like agenticpay's projects/[id]/page.tsx, crafting dynamic .ics file generation from project deadlines and milestones using Blob APIs and libraries like ics.js, alongside intuitive "Add to Calendar" buttons that trigger seamless downloads, I'm exceptionally qualified to implement this solution, fully aligning with the acceptance criteria for enhanced user productivity.

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[kingsleyobinwa1]

@kingsleyobinwa1 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I'll add export to the calendar of this UI

ℹ️ Repo Maintainers: To accept this application, review their application or assign @kingsleyobinwa1 to this issue.

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Congratulations, @kingsleyobinwa1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

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