docs: update CHANGELOG.md for v3.8.0

Author: github-actions[bot]

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 ## Master / Unreleased
 
+## v3.8.0 / 2026-06-29
+- [IMPROVEMENT] Add a SQL query workspace with Iceberg bridge support, including a results grid and a JSON tree viewer for composite/record columns.
+- [IMPROVEMENT] Migrate the Quotas page to the new UI registry and fix out-of-range pagination while preserving zero-value quotas.
+- [IMPROVEMENT] Improve the Overview and Shadow Link pages for users without permissions, and remove the cluster-unhealthy banner from the overview page.
+- [IMPROVEMENT] Add a Redpanda Connect template gallery and improved template management.
+- [IMPROVEMENT] Migrate the Topic detail page to the UI registry with a grouped, navigable Configuration tab.
+- [IMPROVEMENT] Persist topic list pagination, page size, and sorting across the URL and local storage.
+- [IMPROVEMENT] Migrate the frontend to React 19 via a Module Federation bridge.
+- [IMPROVEMENT] Improve accessibility with accessible names for icon-only buttons and `rel="noopener noreferrer"` on external links.
+- [BUGFIX] Bound protobuf git-sync memory usage with a shallow clone and allow disabling periodic refresh.
+- [BUGFIX] Inject the Bearer token on config fetch so authenticated config loading works correctly.
+
 ## v3.7.4 / 2026-05-29
 - [IMPROVEMENT] Rewrite the Security page (users, roles, ACLs) with consistent UI, improved data fetching, ACL popover previews, and confirmation prompts before destructive actions.
 - [IMPROVEMENT] Split topic retention configuration into separate Retention Time and Retention Size controls.