[FEAT] GitLab — contribution graph data

[Priyanshu-byte-coder]

Part of the GitLab integration (#6). Requires #9 (GitLab OAuth) to be merged first.

What Needs to Be Done

Fetch GitLab commit events and pipe them into the existing ContributionGraph component. The graph should merge GitHub + GitLab commits into one unified view.

Files to Look At

• src/app/api/metrics/contributions/route.ts — add GitLab commits fetch logic
• src/components/ContributionGraph.tsx — merge both data sources in display

Acceptance Criteria

• Contributions route also fetches GitLab events when `session.gitlabToken` is present
• ContributionGraph shows combined GitHub + GitLab commits
• Falls back to GitHub-only if no GitLab token in session
• No TypeScript errors, lint passes

Tech Context

GitLab Events API: `https://gitlab.com/api/v4/events?action=pushed&per_page=100\`
Auth header: `Authorization: Bearer `

The project is a single Next.js app deployed on Vercel — all API logic lives in `src/app/api/` route handlers.

[Akanksha-020]

Hi I would like to work on this issue please /assign contributing under GSSoC!
Thanks

[haripri0109r]

Hi @Priyanshu-byte-coder,
I’d like to work on issue #10 under GSSoC’26. I can integrate GitLab contribution data into the existing contribution metrics flow and update the ContributionGraph to merge GitHub and GitLab activity while maintaining the fallback behavior.

Kindly assign this issue to me.

Thank you!

[YAXH64]

hi @Priyanshu-byte-coder i'd like to work on this issue and pull a pr asap under 36 hrs.

[Akanksha-020]

Thanks for assigning... !

[haripri0109r]

Hi @Priyanshu-byte-coder, thanks for assigning me!

I’ve started working on this issue. I’ll first review the existing contribution metrics flow and GitLab OAuth integration (#9 dependency), then implement GitLab event fetching + merge GitHub/GitLab contribution data in the ContributionGraph while preserving GitHub-only fallback.

Will share progress / PR soon. Thanks!