chore: Don't crash if message.author is undefined

Author: PartMan7

src/ps/handlers/page.ts

@@ -2,7 +2,7 @@ import type { PSMessage } from '@/types/ps';
 
 export default function pageHandler(message: PSMessage) {
 	// Do stuff
-	if (message.isIntro || !message.author.userid || !message.target) return;
+	if (message.isIntro || !message.author?.userid || !message.target) return;
 	if (message.type !== 'pm') return;
 	if (!message.content.startsWith('|requestpage|')) return;
 }