fix: fix album modal not showing up

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2327>

front/src/components/channels/AlbumModal.vue

@@ -25,6 +25,9 @@ watch(show, () => {
 })
 
 const albumForm = ref()
+defineExpose({
+  show
+})
 </script>
 
 <template>