🐛(frontend) fix unfold subdocs not clickable at the bottom

At the bottom of the tree panel, the subdocs
were not clickable due to a CSS issue.
This commit adjusts the CSS to ensure that
the subdocs can be unfolded properly.

Author: AntoLC

CHANGELOG.md

@@ -37,6 +37,7 @@ and this project adheres to
   in the ws #1152
 - 🐛(frontend) fix action buttons not clickable #1162
 - 🐛(frontend) fix crash share modal on grid options #1174
+- 🐛(frontend) fix unfold subdocs not clickable at the bottom #1179
 
 ## [3.4.0] - 2025-07-09
 

src/frontend/apps/impress/src/cunningham/cunningham-style.css

@@ -51,6 +51,17 @@
   filter: var(--c--components--image-system-filter);
 }
 
+/**
+* Toast
+*/
+.c__toast__container {
+  z-index: -1;
+}
+
+.c__toast__container:has(.c__toast) {
+  z-index: 10000;
+}
+
 @font-face {
   font-family: Inter;
   font-style: italic;