🐛(frontend) fix toolbar blocknote hidden

The header could hide the formatting bar of the
blocknote editor. This commit improve the z-index
of the header to ensure that the formatting bar
is always visible.

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to
 - ♻️(backend) allow global search in sub documents
 - ✨(backend) add a breadcrumb in the search response
 - ♻️(frontend) move doc action buttons to fix toolbar #2360
+- ♿️(frontend) add aria-hidden to decorative avatar SVGs in share modal #2324
 
 ### Fixed
 
@@ -28,13 +29,10 @@ and this project adheres to
 - 🐛(backend) prevent admins/owners from overwriting other users comments
 - 🐛(y-provider) return empty output when converting empty Yjs document
 - 🐛(backend) use computed_link_reach in handle_onboarding_document #2305
+- 🐛(frontend) fix toolbar blocknote hidden #2373
 - 🐛(frontend) fix application crashes when using GTranslate and zoom #2372
 - 🐛(frontend) fix emoji pdf not matching #2375
 
-### Changed
-
-- ♿️(frontend) add aria-hidden to decorative avatar SVGs in share modal #2324
-
 ## [v5.1.0] - 2026-05-11
 
 ### Added

src/frontend/apps/impress/src/features/header/components/Header.tsx

@@ -35,7 +35,7 @@ export const Header = () => {
           top: 0;
           left: 0;
           right: 0;
-          z-index: 1000;
+          z-index: 10;
           flex-direction: row;
           align-items: center;
           justify-content: space-between;