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/features/lobby/HierarchyItemMenu.tsx

@@ -49,7 +49,7 @@ function SuggestMenuItem({
     useCallback(() => {
       const newContent: MSpaceChildContent = { ...content, suggested: !content.suggested };
       return mx.sendStateEvent(parentId, StateEvent.SpaceChild as any, newContent, roomId);
-    }, [mx, parentId, roomId, content])
+    }, [mx, parentId, roomId, content]),
   );
 
   useEffect(() => {
@@ -86,8 +86,8 @@ function RemoveMenuItem({
   const [removeState, handleRemove] = useAsyncCallback(
     useCallback(
       () => mx.sendStateEvent(parentId, StateEvent.SpaceChild as any, {}, roomId),
-      [mx, parentId, roomId]
-    )
+      [mx, parentId, roomId],
+    ),
   );
 
   useEffect(() => {