Room list: assign room to section when section is created (#33240)

* feat(rls): return section tag when created

* feat(vm): assign section tag to room when section created

* test: update exisiting tests

* test(e2e): check that room is in section

apps/web/src/viewmodels/room-list/RoomListItemViewModel.ts

@@ -400,8 +400,12 @@ export class RoomListItemViewModel
         echoChamber.notificationVolume = elementNotifState;
     };
 
-    public onCreateSection = (): void => {
-        RoomListStoreV3.instance.createSection();
+    public onCreateSection = async (): Promise<void> => {
+        const newTag = await RoomListStoreV3.instance.createSection();
+        // Add the room to the section
+        if (newTag) {
+            tagRoom(this.props.room, newTag);
+        }
     };
 
     public onToggleSection = (tag: string): void => {