Fix going full-screen when opening an external link in a modal

packages/client/src/components/PeekScreenDisplay.svelte

@@ -50,9 +50,13 @@
   }
 
   const handleFullscreen = () => {
+    if ($peekStore.external) {
+      window.location = $peekStore.href
+    } else {
       routeStore.actions.navigate($peekStore.url)
       handleCancel()
     }
+  }
 
   $: {
     if (iframe && !listenersAttached) {