feat(ui): add ViewCounter component and enhance accessibility annotations

Introduce a new `ViewCounter` component to manage view tracking for content. Add biome-ignore comments for accessibility standards in several UI components, enhance semantic element usage, and improve tag handling in `SearchSidebar`.

frontend/src/components/ui/sidebar.tsx

@@ -82,6 +82,7 @@ function SidebarProvider({
 			}
 
 			// This sets the cookie to keep the sidebar state.
+			// biome-ignore lint/suspicious/noDocumentCookie: persistence of sidebar state
 			document.cookie = `${SIDEBAR_COOKIE_NAME}=${openState}; path=/; max-age=${SIDEBAR_COOKIE_MAX_AGE}`;
 		},
 		[setOpenProp, open],