fix: replace removed MDL attributes in Aura CSS (#11448)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: web-padawan

dev/aura/aura-view.css

@@ -87,8 +87,8 @@
 vaadin-app-layout:is([drawer-opened]:not([overlay]), :has(> [slot='navbar'] vaadin-drawer-toggle))
   :is(.aura-view > header, .aura-view-header)
   vaadin-drawer-toggle:not([theme~='permanent']),
-vaadin-master-detail-layout:not([drawer], [stack]) [slot='detail'].aura-view > header mdl-back-button,
-vaadin-master-detail-layout:not([drawer], [stack]) [slot='detail'] .aura-view > header mdl-back-button {
+vaadin-master-detail-layout:not([overlay]) [slot='detail'].aura-view > header mdl-back-button,
+vaadin-master-detail-layout:not([overlay]) [slot='detail'] .aura-view > header mdl-back-button {
   display: none;
 
   & + :is(h1, h2, h3, h4, h5, h6, .aura-view-heading) {

packages/aura/src/components/app-layout.css

@@ -93,13 +93,8 @@ vaadin-app-layout > vaadin-master-detail-layout:nth-child(1 of :not([slot])):nth
     padding-left: var(--safe-area-inset-left);
   }
 
-  &[stack]::part(detail) {
-    padding-left: var(--safe-area-inset-left);
-    padding-right: var(--safe-area-inset-right);
-  }
-
   & > vaadin-master-detail-layout,
-  &:not([drawer])::part(detail) {
+  &:not([overlay])::part(detail) {
     border-start-end-radius: var(--_app-layout-radius);
     border-end-end-radius: var(--_app-layout-radius);
   }
@@ -108,7 +103,7 @@ vaadin-app-layout > vaadin-master-detail-layout:nth-child(1 of :not([slot])):nth
     border-radius: calc(var(--_app-layout-radius) - var(--aura-app-layout-border-width));
   }
 
-  &:is([drawer][has-detail]) {
+  &:is([overlay][has-detail]) {
     border-color: light-dark(var(--vaadin-border-color), var(--vaadin-border-color-secondary));
   }
 }