fix: hide scroll-to-top button on non-mobile devices

[RYGRIT]

🔗 Linked issue

🧭 Context

I've seen discussions on Discord about "Scroll to Top" buttons on tablets/desktops.

📚 Description

This PR is merely a safety measure to prevent the button from appearing where it shouldn't—you can always close this PR if you prefer the previously discussed approach.

This is a minimal fix.

• Add an isMobile media query check

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Feb 28, 2026 4:08am

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Feb 28, 2026 4:08am
npmx-lunaria	Ignored		Feb 28, 2026 4:08am

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 671d13a and 7769e45.

📒 Files selected for processing (1)

• app/pages/package/[[org]]/[name].vue

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📝 Walkthrough

Walkthrough

The showScrollToTop computed property in the package page component has been modified to include an additional condition. The button now requires the device to satisfy both mobile status (isMobile) and touch capability (isTouchDeviceClient) checks before displaying based on scroll position. Previously, the visibility condition only evaluated touch device capability alongside the scroll threshold.

Possibly related PRs

• npmx-dev/npmx.dev PR 1453: Modifies the same showScrollToTop logic to gate the back-to-top button visibility by mobile and touch device checks in combination with scroll position threshold.

Suggested reviewers

• danielroe

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description clearly relates to the changeset, explaining the rationale for adding an isMobile check to the showScrollToTop computed property.

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✨ Finishing Touches

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

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