New room list: add empty state (#29512)

* refactor: extract room creation and right verification

* refactor: update `RoomListHeaderViewModel` to use utils

* feat(room list filter): add filter key to `PrimaryFilter` model

* feat(room list filter): return active primary filter

* feat(room list): add create room action and rights verification

* test: update room list tests

* feat(empty room list): add empty room list

* test(empty room list): add empty room list tests

* feat(room list): use empty room list in `RoomListView`

* test(room list panel): update tests

* test(e2e): add e2e tests for empty room list

* test(e2e): update room list header snapshot

test/unit-tests/components/views/rooms/RoomListPanel/RoomListView-test.tsx

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+import { mocked } from "jest-mock";
+import { render, screen } from "jest-matrix-react";
+import React from "react";
+
+import {
+    type RoomListViewState,
+    useRoomListViewModel,
+} from "../../../../../../src/components/viewmodels/roomlist/RoomListViewModel";
+import { SecondaryFilters } from "../../../../../../src/components/viewmodels/roomlist/useFilteredRooms";
+import { SortOption } from "../../../../../../src/components/viewmodels/roomlist/useSorter";
+import { RoomListView } from "../../../../../../src/components/views/rooms/RoomListPanel/RoomListView";
+import { mkRoom, stubClient } from "../../../../../test-utils";
+
+jest.mock("../../../../../../src/components/viewmodels/roomlist/RoomListViewModel", () => ({
+    useRoomListViewModel: jest.fn(),
+}));
+
+describe("<RoomListView />", () => {
+    const defaultValue: RoomListViewState = {
+        rooms: [],
+        primaryFilters: [],
+        activateSecondaryFilter: jest.fn().mockReturnValue({}),
+        activeSecondaryFilter: SecondaryFilters.AllActivity,
+        sort: jest.fn(),
+        activeSortOption: SortOption.Activity,
+        createRoom: jest.fn(),
+        createChatRoom: jest.fn(),
+        canCreateRoom: true,
+        toggleMessagePreview: jest.fn(),
+        shouldShowMessagePreview: false,
+    };
+    const matrixClient = stubClient();
+
+    afterEach(() => {
+        jest.resetAllMocks();
+    });
+
+    it("should render an empty room list", () => {
+        mocked(useRoomListViewModel).mockReturnValue(defaultValue);
+
+        render(<RoomListView />);
+        expect(screen.getByText("No chats yet")).toBeInTheDocument();
+    });
+
+    it("should render a room list", () => {
+        mocked(useRoomListViewModel).mockReturnValue({
+            ...defaultValue,
+            rooms: [mkRoom(matrixClient, "testing room")],
+        });
+
+        render(<RoomListView />);
+        expect(screen.getByRole("grid", { name: "Room list" })).toBeInTheDocument();
+    });
+});