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/test/unit-tests/stores/room-list-v3/RoomListStoreV3-test.ts

@@ -1021,11 +1021,10 @@ describe("RoomListStoreV3", () => {
                 await store.start();
 
                 const sectionCreatedListener = jest.fn();
-                const listsUpdateListener = jest.fn();
                 store.on(SECTION_CREATED_EVENT, sectionCreatedListener);
-                store.on(LISTS_UPDATE_EVENT, listsUpdateListener);
 
-                await store.createSection();
+                const tag = await store.createSection();
+                expect(tag).toBe("element.io.section.test-tag");
 
                 expect(sectionCreatedListener).toHaveBeenCalledWith("element.io.section.test-tag");
             });

apps/web/test/unit-tests/stores/room-list-v3/section-test.ts

@@ -23,14 +23,15 @@ describe("createSection", () => {
     it.each([
         [false, "", undefined],
         [true, "", undefined],
-    ])("returns undefined when shouldCreate=%s and name='%s'", async (shouldCreate, name, expected) => {
+        [true, "My Section", expect.stringMatching(/^element\.io\.section\./)],
+    ])("returns %s when shouldCreate=%s and name='%s'", async (shouldCreate, name, expected) => {
         jest.spyOn(Modal, "createDialog").mockReturnValue({
             finished: Promise.resolve([shouldCreate, name]),
             close: jest.fn(),
         } as any);
 
         const result = await createSection();
-        expect(result).toBe(expected);
+        expect(result).toEqual(expected);
     });
 
     it("returns the new tag when section is created", async () => {