fix: cleanup unused imports, restore campaigns, fix settings pagination syntax

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/pages/campaigns.tsx

@@ -122,7 +122,7 @@ export const CampaignsPage = () => {
                                                 iconLeading={({ className }: { className?: string }) => (
                                                     <FontAwesomeIcon icon={faPenToSquare} className={className} />
                                                 )}
-                                                onClick={(e) => {
+                                                onClick={(e: React.MouseEvent) => {
                                                     e.preventDefault();
                                                     e.stopPropagation();
                                                     setEditCampaign(campaign);