fix(components): update character selector

ensure that `undefined` isn't passed to character option array

components/story/atoms/characters.vue

@@ -8,7 +8,7 @@
 	const opts = computed(() => {
 		const unflattened: any[] = [];
 		selectedBands?.value?.forEach((v: number) => {
-			unflattened.push(allBands?.value.find((a) => a._id == v)?.characters);
+			unflattened.push(allBands?.value.find((a) => a._id == v)?.characters ?? []);
 		});
 		return unflattened.flat(Infinity).map((a) => ({ value: a, label: a }));
 	});