feat: public events/polls, friends graph, captcha, SSE hardening, and admin UX

Ship product gaps: register/vote pages, friend add/accept/decline/remove, email verify TTL, captcha on login/forgot, soft-fail user actions, SSE abort/shared client, Commando Centrum error toasts, admin delete for events/polls, and IT/NL i18n fills.

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

src/app/admin/favicon/page.tsx

@@ -3,8 +3,6 @@ import { FaviconForm } from "./favicon-form";
 import { redirect } from "next/navigation";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
 
-export const dynamic = "force-dynamic";
-
 export default async function AdminFaviconPage() {
 	const { session, permissions } = await getAdminContext();
 	if (!canAccess(permissions, PERMS.SETTINGS_VIEW, session.user.rank)) {