feat(utils): add scroll utilities

[maitamdev]

Scroll-to-element and scroll lock for modals.

---

Summary by cubic

Adds simple scroll utilities to improve navigation and modal behavior. Enables smooth scroll to targets and prevents background scrolling when overlays are open.

• New Features
  • scrollToElement(id, offset=80): smooth scroll to an element, with header-safe offset.
  • lockScroll(): freezes body scroll and returns an unlock function to restore position.

^{Written for commit 043cd27. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
dhv-guiding-light	Building	Preview, Comment	Mar 4, 2026 7:09pm

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⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 05a21c3b-02bf-4147-8fb3-eac75a2ca087

📥 Commits

Reviewing files that changed from the base of the PR and between e2c7806 and 043cd27.

📒 Files selected for processing (1)

• src/utils/scrollUtils.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/scroll-utils

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[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="src/utils/scrollUtils.ts">

<violation number="1" location="src/utils/scrollUtils.ts:8">
P2: Unlocking scroll clears pre-existing body inline styles instead of restoring previous values, which can break layout state after closing a modal.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[cubic-dev-ai]

P2: Unlocking scroll clears pre-existing body inline styles instead of restoring previous values, which can break layout state after closing a modal.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At src/utils/scrollUtils.ts, line 8:

<comment>Unlocking scroll clears pre-existing body inline styles instead of restoring previous values, which can break layout state after closing a modal.</comment>

<file context>
@@ -0,0 +1,14 @@
+}
+
+export function lockScroll(): () => void {
+  const scrollY = window.scrollY;
+  document.body.style.position = 'fixed';
+  document.body.style.top = '-' + scrollY + 'px';
</file context>