fix: stop link component opening internal page in new tab

src/components/Link.astro

@@ -3,13 +3,21 @@ import type { HTMLAttributes } from "astro/types";
 
 interface Props extends HTMLAttributes<"a"> {
   href: string;
-  external?: boolean;
-  class?: string;
 }
 
-const { href, external = true, ...rest } = Astro.props;
+const { href, ...rest } = Astro.props;
+
+const isExternal =
+  /^(https?:)?\/\//.test(href) ||
+  href.startsWith("mailto:") ||
+  href.startsWith("tel:");
 ---
 
-<a href={href} target={external ? "_blank" : "_self"} {...rest}>
+<a
+  href={href}
+  target={isExternal ? "_blank" : "_self"}
+  rel={isExternal ? "noopener noreferrer" : undefined}
+  {...rest}
+>
   <slot />
 </a>