fix: restore rooms and DMs after React Router 7 upgrade

Stop double-encoding Matrix IDs in pathUtils, decode route params on read, fix millify CJS import, and read space children from currentState so channels and joins work again.

src/app/hooks/router/useExploreSelected.ts

@@ -1,5 +1,5 @@
 import { useMatch, useParams } from 'react-router-dom';
-import { getExploreFeaturedPath, getExplorePath } from '../../pages/pathUtils';
+import { decodeRouteParam, getExploreFeaturedPath, getExplorePath } from '../../pages/pathUtils';
 
 export const useExploreSelected = (): boolean => {
   const match = useMatch({
@@ -24,5 +24,5 @@ export const useExploreFeaturedSelected = (): boolean => {
 export const useExploreServer = (): string | undefined => {
   const { server } = useParams();
 
-  return server;
+  return decodeRouteParam(server);
 };