fix(css): fix sticky footer with layout-fixed and prevent sidebar scroll chaining (#5805, #5864)

- Fixed footer: add min-height: 0 on app-main when layout-fixed is used
  so the grid row correctly constrains the main area while keeping the
  footer pinned at bottom.
- Sidebar: add overscroll-behavior: contain to sidebar-wrapper to prevent
  scroll events from propagating to the body on mobile, which could
  trigger viewport resizes and unintended sidebar collapse.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: puikinsh

dist/css/adminlte.css

@@ -20,4 +20,13 @@
     bottom: 0;
     z-index: $lte-zindex-fixed-footer;
   }
+
+  // When layout-fixed is used, app-main has overflow: auto which prevents
+  // position: sticky from working on the footer. Ensure the grid keeps the
+  // footer pinned at the bottom while app-main scrolls independently.
+  &.layout-fixed {
+    .app-main {
+      min-height: 0;
+    }
+  }
 }

dist/css/adminlte.css.map

@@ -78,6 +78,7 @@
   padding-right: $lte-sidebar-padding-x;
   padding-bottom: $lte-sidebar-padding-y;
   padding-left: $lte-sidebar-padding-x;
+  overscroll-behavior: contain;
   @include scrollbar-color-gray();
   @include scrollbar-width-thin();