chore: upgrade i18next 26, prettier 3, fontsource-variable, domhandler 6, lint-staged 17

- i18next 23->26 + react-i18next 15->17
- prettier 2->3, reformat all files
- replace @fontsource/inter with @fontsource-variable/inter 5, update import path
- domhandler 5->6 (aligns with transitive deps)
- lint-staged 16->17

src/app/components/create-room/AdditionalCreatorInput.tsx

@@ -35,7 +35,7 @@ import { highlightText, makeHighlightRegex } from '../../plugins/react-custom-ht
 export const useAdditionalCreators = (defaultCreators?: string[]) => {
   const mx = useMatrixClient();
   const [additionalCreators, setAdditionalCreators] = useState<string[]>(
-    () => defaultCreators?.filter((id) => id !== mx.getSafeUserId()) ?? []
+    () => defaultCreators?.filter((id) => id !== mx.getSafeUserId()) ?? [],
   );
 
   const addAdditionalCreator = (userId: string) => {
@@ -90,12 +90,12 @@ export function AdditionalCreatorInput({
   const [validUserId, setValidUserId] = useState<string>();
   const filteredUsers = useMemo(
     () => directUsers.filter((userId) => !additionalCreators.includes(userId)),
-    [directUsers, additionalCreators]
+    [directUsers, additionalCreators],
   );
   const [result, search, resetSearch] = useAsyncSearch(
     filteredUsers,
     getUserIdString,
-    SEARCH_OPTIONS
+    SEARCH_OPTIONS,
   );
   const queryHighlighRegex = result?.query ? makeHighlightRegex([result.query]) : undefined;