add mention to composer

src/shared/composer/mention/item.tsx

@@ -0,0 +1,31 @@
+import { Image } from '@shared/image';
+
+import { DEFAULT_AVATAR } from '@stores/constants';
+
+import { displayNpub } from '@utils/shortenKey';
+import { Profile } from '@utils/types';
+
+export function MentionItem({ profile }: { profile: Profile }) {
+  return (
+    <div className="flex items-center gap-2">
+      <div className="h-8 w-8 shrink-0 overflow-hidden rounded-md bg-zinc-900">
+        <Image
+          src={profile.picture || profile.image}
+          fallback={DEFAULT_AVATAR}
+          alt={profile.pubkey}
+          className="h-8 w-8 object-cover"
+        />
+      </div>
+      <div className="flex flex-col gap-px">
+        <h5 className="max-w-[15rem] text-sm font-medium leading-none text-zinc-100">
+          {profile.ident || (
+            <div className="h-3 w-20 animate-pulse rounded-sm bg-zinc-700" />
+          )}
+        </h5>
+        <span className="text-sm leading-none text-zinc-400">
+          {profile.nip05 || profile.username || displayNpub(profile.pubkey, 16)}
+        </span>
+      </div>
+    </div>
+  );
+}