fix: redirect to episode overview if episode cannot be found

src/Pages/ShowEpisode.vue

@@ -19,7 +19,7 @@ const router = useRouter()
 const route = useRoute()
 const episodeStore = useEpisodeStore()
 const mediaStore = useMediaStore()
-const { obj: episode } = useObjectFromStore(
+const { obj: episode, isLoading: isLoadingEpisode } = useObjectFromStore(
   () => parseInt(route.params.episodeId as string),
   episodeStore,
 )
@@ -27,6 +27,13 @@ const { obj: media } = useObjectFromStore(() => episode.value?.mediaId ?? null,
 
 defineNavigationContext(() => ({ episode }))
 
+watchEffect(() => {
+  if (!episode.value && !isLoadingEpisode.value) {
+    // if the episode could not be found redirect to the overview page
+    void router.push({ name: 'show-episodes', params: { showId: props.show.id.toString() } })
+  }
+})
+
 watchEffect(() => {
   const showId = episode.value?.showId
   // if episode.showId doesn’t match the provided show.id,