fix: soo many lint errors

components/PageHero.tsx

@@ -104,7 +104,7 @@ function Header({ children }: { children: ComponentChildren }) {
 function Subline(
   { entries, children }: {
     children?: ComponentChildren;
-    entries: (string | { href: string; title: string })[];
+    entries: (string | undefined | { href: string; title: string })[];
   },
 ) {
   const ctx = useContext(HeroContext);
@@ -117,10 +117,11 @@ function Subline(
       {entries.filter((s) =>
         s && (typeof s === "string" ? s?.length > 1 : true)
       ).map((s) => {
+        if (!s) return;
         if (typeof s === "string") {
-          return <span>{s}</span>;
+          return <span key={s}>{s}</span>;
         } else {
-          return <a href={s.href}>{s.title}</a>;
+          return <a key={s.href} href={s.href}>{s.title}</a>;
         }
       })}
     </div>