fix(inspector): handle autocomplete keydown event (#338)

Co-authored-by: bluwy <[email protected]>

Author: MathiasWP

.changeset/hot-crabs-reply.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+Handle inspector autocomplete keydown event

packages/vite-plugin-svelte/src/ui/inspector/Inspector.svelte

@@ -99,7 +99,7 @@
 	}
 
 	function keydown(event) {
-		if (event.repeat) {
+		if (event.repeat || event.key === undefined) {
 			return;
 		}