fix: ensure last sidebar item is visible when scrolling

   Fixes #8521
   - Added sticky positioning to sidebar
   - Constrained max-height to account for navbar height
   - Enables proper scrolling without cutting off last items

Author: SimoHypers

packages/ui-components/src/Containers/Sidebar/index.module.css

@@ -10,7 +10,10 @@
     bg-white
     px-4
     py-6
-    sm:overflow-auto
+    sm:sticky
+    sm:top-16
+    sm:max-h-[calc(100vh-6.5rem)]
+    sm:overflow-y-auto
     sm:border-r
     md:max-w-xs
     lg:px-6