feat: add optional copy sponsor link button

[madhavansingh]

Addressed Issues:

Fixes #15

Screenshots/Recordings:

N/A – This feature adds an optional copy sponsor link button for sponsor cards. Since the change introduces a small interactive feature, visual UI structure remains mostly unchanged.

Additional Notes:

This PR introduces an optional Copy Sponsor Link button for sponsor cards.

When enabled, users can easily copy the sponsor's URL to their clipboard using the browser Clipboard API.

Key points:

• Adds a new optional prop: showCopyLinkButton
• Uses navigator.clipboard.writeText() to copy the sponsor URL
• Improves usability by allowing quick sharing of sponsor links
• Maintains TypeScript compatibility and does not modify existing functionality

This enhancement improves user interaction and makes it easier to share sponsor links.

Checklist

• My code follows the project's code style and conventions
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have joined the Discord server and I will share a link to this PR with the project maintainers there
• I have read the Contributing Guidelines

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📥 Commits

Reviewing files that changed from the base of the PR and between 6f9f9a2 and 4693d91.

📒 Files selected for processing (2)

• src/components/SupportUsButton.tsx
• src/types/index.ts

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• Create PR with unit tests
• Post copyable unit tests in a comment

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[madhavansingh]

Hi maintainers, I implemented the optional copy sponsor link feature as part of my GSoC 2026 preparation with AOSSIE. Please let me know if any changes are needed. Thank you!

[github-actions]

⚠️ This PR has merge conflicts.

Please resolve the merge conflicts before review.

Your PR will only be reviewed by a maintainer after all conflicts have been resolved.

📺 Watch this video to understand why conflicts occur and how to resolve them:
https://www.youtube.com/watch?v=Sqsz1-o7nXk

[rahul-vyas-dev]

Not planned.