feat: Add dynamic Badge & Stats Share Card generator in Contributor leaderboard

[SamXop123]

Description

This PR implements a client-side dynamic share/export card generator inside the Contributor Leaderboard.

Fixes #1839

Key Implementations:

• Card Generator Engine (src/utils/cardGenerator.ts): Constructs a custom 1200 x 630px (Open Graph optimized) card using browser-native HTML5 Canvas. Includes Recode Hive branding, circular formatted avatar clipping, statistics breakdown columns (PRs & Points), and highlights unlocked achievement badges (graying out locked badges).
• Dual Export Actions (BadgeModal.tsx): Adds side-by-side action buttons for contributors:
  • Download Button: Compiles the card and triggers an instant direct browser PNG file download.
  • Share Button: Triggers the native OS share dialog (via navigator.share) for social media integration.
• Mock Fallback Bugfix (leaderboard.tsx): Fixed the dev fallback rendering bug where errors in API fetching would hide mock lists instead of rendering the mockContributors fallback array.
• UX Improvements: Implemented fallback letter-avatars if CORS/avatar load fails, loading states for button indicators, and media-query overrides for responsive alignment.

Preview

2026-06-03.15-31-31.mp4

Output:

Verification Details

• Verified local dev environment (npm run dev)
• Executed npm run typecheck (Passed successfully with 0 errors)
• Executed npm run build (Passed successfully with 0 errors)

Type of Change

• New feature (e.g., new page, component, or functionality)
• Bug fix (non-breaking change that fixes an issue)
• UI/UX improvement (design, layout, or styling updates)
• Performance optimization (e.g., code splitting, caching)
• Documentation update (README, contribution guidelines, etc.)
• Other (please specify):

---

• My code follows the style guidelines of this project.
• I have tested my changes across major browsers and devices
• My changes do not generate new console warnings or errors .
• I ran npm run build and attached screenshot(s) in this PR.
• This is already assigned Issue to me, not an unassigned issue.

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[github-actions]

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[github-actions]

✅ Synchronized metadata from Issue #1839:

• Labels: level 1, recode, Enhacement, high priority, medium, level:critical, qualiy:excepional, gssoc:approved
• Milestone: recode:launch 3.0

[SamXop123]

Maintainers, please review the PR and just tell if u wish to have any design modifications or any improvements, i m ready to update as required.,
also, i noticed a little typo in the quality:exceptional label 😅 there is a missing 't' in both the words.

[Adez017]

Hi @SamXop123 great feature implementation to be honest and this us really good , i just had some suggestion below :

• instead of a diamond brack near recodehive (as mention in image below ) can we our logo their?
• The color pallete used is seem to be a dark gradient can we choose something light palette for the card .

[Adez017]

few suggestions that needs to be resolved .

[SamXop123]

few suggestions that needs to be resolved .

@Adez017 thanks for the review. Btw for the color palette, what exactly do you want as the background? Like a completely light (white) background or a lighter variant of the previous blue background ?

Is this fine ??

[github-actions]

✅ Synchronized metadata from Issue #1839:

• Labels: level 1, recode, Enhacement, high priority, medium, level:critical, qualiy:excepional, gssoc:approved
• Milestone: recode:launch 3.0

[SamXop123]

@Adez017 I have pushed the commit for this, if you liked this variant you can merge straightaway.
otherwise if you want any other color palette just mention, I would change it again to match the needful.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
recode-website	Ready	Preview, Comment	Jun 6, 2026 6:46am

[Adez017]

Everything else looks good but can we have a little space between `Recode` and `hive` , rest things looks good atm

[github-actions]

✅ Synchronized metadata from Issue #1839:

• Labels: level 1, recode, Enhacement, high priority, medium, level:critical, qualiy:excepional, gssoc:approved
• Milestone: recode:launch 3.0

[SamXop123]

resolved! @Adez017