[Carousel] Hide prev/next navigation arrows when there is nothing left to scroll

[Maanvi212006]

What this fixes

The Carousel component (used by PerformersSection / "Top Performers") always shows both the left and right navigation arrows, even when the row is fully scrolled to the start or end, or when all items already fit on screen with nothing to scroll. This was flagged as part of catalog UX feedback: the arrows give a false signal that there's more content in a direction where there isn't.

Change

• Added canScrollLeft / canScrollRight state, computed from the scroll container's scrollLeft, clientWidth, and scrollWidth.
• Arrow visibility is now recalculated on mount, on onScroll, on window resize, and when the item count changes (metrics load asynchronously).
• Each arrow is hidden (visibility: hidden) instead of unmounted, so the carousel's layout doesn't shift when an arrow disappears.
• Added a small scroll tolerance (1px) to account for fractional scroll positions from scroll-snap-type: x mandatory.
• Added missing aria-labels to both buttons.

Only src/custom/Carousel/Carousel.tsx was changed.

screen-capture.8.mp4

This PR fixes #

Signed commits

• Yes, I signed my commits.

Summary by CodeRabbit

• Bug Fixes

  • Carousel navigation buttons are hidden when scrolling further in their direction isn’t available.
  • Navigation availability updates after scrolling, resizing, or changes to carousel items, including changes that affect item widths.
  • Scroll availability is handled accurately at fractional scroll positions, avoiding incorrect button visibility near the ends of a carousel.

• Accessibility

  • Carousel navigation buttons now have accessible labels.

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ℹ️ Recent review info

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• src/custom/Carousel/Carousel.tsx

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📝 Walkthrough

Walkthrough

The carousel tracks directional scroll availability. It updates this state on scroll, container or child resize, and changes to the item count. Navigation buttons hide when scrolling in their direction is unavailable and have accessible labels.

Changes

Carousel scroll controls

Layer / File(s)	Summary
Scroll tracking and navigation controls src/custom/Carousel/Carousel.tsx	The component recalculates directional scroll availability with a one-pixel tolerance. A ResizeObserver tracks container and child size changes. Navigation buttons have accessible labels and hide when scrolling in their direction is unavailable.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: katotodan

Merge Risk: ⚪ Minimal · up to 409b0

Directional navigation is updated from the carousel’s scroll metrics without a verified merge-blocking regression.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: hiding Carousel navigation arrows when no scrolling is available in that direction.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In `@src/custom/Carousel/Carousel.tsx`:
- Line 37: Update the dependency array for the effect invoking updateScrollState
to depend on items rather than items.length, so content changes with unchanged
item count trigger recalculation. If rendered children can resize after the
effect runs, observe the items or their size-tracking wrapper with
ResizeObserver and invoke updateScrollState on size changes.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 47220cdd-821f-486c-a2c8-059e2e920d3a

📥 Commits

Reviewing files that changed from the base of the PR and between d3f4cc3 and f6cfea3.

📒 Files selected for processing (1)

• src/custom/Carousel/Carousel.tsx

Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review.

[Katotodan]

@Maanvi212006 can you provide screen recording of before and after?

[Katotodan]

Look good overall.
Just few points to discuss.