Fix spaces support in UI

matrixgw_frontend/src/widgets/messages/SpaceSelector.tsx

@@ -3,16 +3,18 @@ import { Button } from "@mui/material";
 import React from "react";
 import type { UsersMap } from "../../api/matrix/MatrixApiProfile";
 import type { Room } from "../../api/matrix/MatrixApiRoom";
+import type { SpaceHierarchy } from "../../api/matrix/MatrixApiSpace";
 import { RoomIcon } from "./RoomIcon";
 
 export function SpaceSelector(p: {
   rooms: Room[];
+  hierarchy: SpaceHierarchy;
   users: UsersMap;
   selectedSpace?: string;
   onChange: (space?: string) => void;
 }): React.ReactElement {
   const spaces = React.useMemo(
-    () => p.rooms.filter((r) => r.is_space),
+    () => p.rooms.filter((r) => r.is_space && p.hierarchy.has(r.id)),
     [p.rooms]
   );