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/hooks/useRoomDirectoryVisibility.ts

@@ -10,7 +10,7 @@ export const useRoomDirectoryVisibility = (roomId: string) => {
     useCallback(async () => {
       const v = await mx.getRoomDirectoryVisibility(roomId);
       return v.visibility === Visibility.Public;
-    }, [mx, roomId])
+    }, [mx, roomId]),
   );
 
   useEffect(() => {
@@ -21,11 +21,11 @@ export const useRoomDirectoryVisibility = (roomId: string) => {
     async (visibility: boolean) => {
       await mx.setRoomDirectoryVisibility(
         roomId,
-        visibility ? Visibility.Public : Visibility.Private
+        visibility ? Visibility.Public : Visibility.Private,
       );
       await loadVisibility();
     },
-    [mx, roomId, loadVisibility]
+    [mx, roomId, loadVisibility],
   );
 
   return {