feat(artifacts): enhance ArtifactsLibrary UI and add artifacts page detection

- Introduced a new state for detecting the artifacts page in LayoutDataProvider.
- Simplified the EmptyState component in ArtifactsLibrary for a cleaner presentation.
- Improved header layout in ArtifactsLibrary for better responsiveness and visual clarity.

surfsense_web/components/layout/ui/sidebar/AllChatsSidebar.tsx

@@ -249,7 +249,7 @@ function AllChatsContent({ searchSpaceId, className }: AllChatsContentProps) {
 									variant="secondary"
 									className="h-7 gap-1.5 rounded-md px-2.5 text-xs font-medium"
 								>
-									<span className="text-muted-foreground">Filter by</span>
+									<span className="font-semibold text-muted-foreground">Filter by</span>
 									<span>{selectedFilterLabel}</span>
 									<ChevronDown className="h-3 w-3 text-muted-foreground" />
 								</Button>