feat(share): add native Web Share API path on mobile

[Calebux]

Context

Mobile browsers can use the native share sheet, which is better than platform-specific popup links when available.

Acceptance Criteria

• Use navigator.share when supported.
• Fallback to existing social menu otherwise.
• Track and handle share cancellation without showing errors.

References

• app/share/page.tsx
• app/components/ShareButtons.tsx

[auracule007]

@auracule007 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainers, I'm Promise. I'm a frontend developer with 4+ years of experience in React and Web Share API integration. I'd like to work on this Web Share API issue. I can use navigator.share on mobile with a fallback and handle cancellations gracefully. My ETA is 1-2 hours.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @auracule007 to this issue.

[drips-wave]

Congratulations, @auracule007! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @auracule007: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊