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What does this MR do and why?

This MR migrates and removes instances of deprecated issue-related icons in the product as part of gitlab-svgs#438 (moved)

Replaced issue-closed with issue-close (where icon-only usage is required).
Replaced issues with issue-type-issue.
Verified that issue-update is unused in the codebase.
Confirmed no remaining references to epic-closed and requirements icons in the product code.

This aligns the product with the updated icon set and avoids usage of deprecated icons.

References

Related issue: #526952 (closed)
Icon deprecation discussion: gitlab-svgs#438 (moved)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Search for deprecated icons in the codebase to confirm none remain:

git grep -l "issue-closed" -- app
git grep -l "epic-closed" -- app
git grep -l "issue-update" -- app
git grep -l "['"]issues['"]" -- app
git grep -l "['"]requirements['"]" -- app

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #526952 (closed)

Edited Oct 07, 2025 by David Aniebo

Resolve "Migrate or remove instances of deprecated issues icons in product"