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/components/navigation.tsx

@@ -59,6 +59,12 @@ export async function Navigation() {
 						<Link href="/guilds" className="dropdown-item" role="menuitem">
 							{t("guilds")}
 						</Link>
+						<Link href="/events" className="dropdown-item" role="menuitem">
+							{t("events")}
+						</Link>
+						<Link href="/polls" className="dropdown-item" role="menuitem">
+							{t("polls")}
+						</Link>
 					</NavDropdown>
 
 					<NavDropdown
@@ -196,6 +202,12 @@ export async function Navigation() {
 						<Link href="/guilds" className="dropdown-item" role="menuitem">
 							{t("guilds")}
 						</Link>
+						<Link href="/events" className="dropdown-item" role="menuitem">
+							{t("events")}
+						</Link>
+						<Link href="/polls" className="dropdown-item" role="menuitem">
+							{t("polls")}
+						</Link>
 					</NavDropdown>
 
 					<NavDropdown