fix: 🐛

src/components/MailboxSetting/index.tsx

@@ -47,6 +47,9 @@ export default function MailboxSetting() {
   const saveNewMailboxRelay = (url: string) => {
     if (url === '') return null
     const normalizedUrl = normalizeUrl(url)
+    if (!normalizedUrl) {
+      return t('Invalid relay URL')
+    }
     if (relays.some((r) => r.url === normalizedUrl)) {
       return t('Relay already exists')
     }

src/components/RelaySetsSetting/RelayUrl.tsx

@@ -29,6 +29,9 @@ export default function RelayUrls({ relaySetId }: { relaySetId: string }) {
   const saveNewRelayUrl = () => {
     if (newRelayUrl === '') return
     const normalizedUrl = normalizeUrl(newRelayUrl)
+    if (!normalizedUrl) {
+      return setNewRelayUrlError(t('Invalid relay URL'))
+    }
     if (relaySet.relayUrls.includes(normalizedUrl)) {
       return setNewRelayUrlError(t('Relay already exists'))
     }

src/components/SaveRelayDropdownMenu/index.tsx

@@ -23,7 +23,7 @@ export default function SaveRelayDropdownMenu({
 }) {
   const { t } = useTranslation()
   const { relaySets } = useRelaySets()
-  const normalizedUrls = useMemo(() => urls.map((url) => normalizeUrl(url)), [urls])
+  const normalizedUrls = useMemo(() => urls.map((url) => normalizeUrl(url)).filter(Boolean), [urls])
   const alreadySaved = useMemo(
     () => relaySets.some((set) => normalizedUrls.every((url) => set.relayUrls.includes(url))),
     [relaySets, normalizedUrls]