feat(web): enhance ReUI components and sidebar navigation

- Updated frontend UI patterns documentation to include new ReUI components and improved navigation instructions.
- Enhanced AppSidebar to utilize active state management for better user experience.
- Refactored layout components in the ReUI kit for improved spacing and alignment.
- Introduced KanbanBoardSkeleton for loading states in Kanban boards.
- Improved OpsDashboard and ResourcePage with consistent header layouts and enhanced accessibility features.

Co-authored-by: Cursor <[email protected]>

apps/web/src/components/reui-kit/settings-shell.tsx

@@ -58,10 +58,12 @@ export function SettingsShell({
     <PageShell>
       <div ref={rootRef} className="mx-auto flex w-full max-w-4xl flex-col gap-6">
         <header className="px-1">
-          <h1 className="text-xl font-semibold tracking-tight">{title}</h1>
-          <p className="text-muted-foreground max-w-2xl text-sm leading-relaxed">
-            {description}
-          </p>
+          <div className="flex flex-col gap-px">
+            <h1 className="text-xl font-semibold tracking-tight">{title}</h1>
+            <p className="text-muted-foreground max-w-2xl text-sm leading-relaxed">
+              {description}
+            </p>
+          </div>
         </header>
 
         <div
@@ -86,12 +88,13 @@ export function SettingsShell({
                   <Link
                     key={tab.id}
                     to={tab.to}
+                    aria-current={isActive ? 'page' : undefined}
                     className={cn(
                       'flex items-center gap-2 rounded-lg px-3 py-2 text-sm transition-colors',
                       isMobile && 'shrink-0',
                       !isMobile && 'w-full',
                       isActive
-                        ? 'bg-muted text-foreground font-medium'
+                        ? 'bg-muted text-foreground font-medium shadow-sm ring-1 ring-border/60'
                         : 'text-muted-foreground hover:bg-muted/60 hover:text-foreground',
                     )}
                   >