fix(keys): escape closes palette and cheatsheet, page keys stay quiet behind a modal

src/lib/keys.svelte.ts

@@ -88,7 +88,11 @@ class Keys {
   }
 
   handle = (event: KeyboardEvent) => {
-    if (event.defaultPrevented || event.isComposing) {
+    if (
+      event.defaultPrevented ||
+      event.isComposing ||
+      document.querySelector("dialog:modal")
+    ) {
       return;
     }
     if (["Shift", "Control", "Meta", "Alt"].includes(event.key)) {