Allow joined rooms to be pushed within a space. (#4460)

* Allow joined rooms to be pushed within a space.

* Push a room in the space flow tests.

Also fixes some snapshots stale snapshots.

* Show the selected space/room within a space and set a custom title view.

ElementX/Sources/Screens/Spaces/SpaceScreen/View/SpaceScreen.swift

@@ -19,16 +19,17 @@ struct SpaceScreen: View {
                 rooms
             }
         }
-        .navigationTitle(context.viewState.space.name ?? L10n.commonSpace)
-        .navigationBarTitleDisplayMode(.inline)
         .background(Color.compound.bgCanvasDefault.ignoresSafeArea())
+        .navigationTitle(context.viewState.spaceName)
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbar { toolbar }
     }
     
     @ViewBuilder
     var rooms: some View {
         ForEach(context.viewState.rooms, id: \.id) { spaceRoomProxy in
             SpaceRoomCell(spaceRoomProxy: spaceRoomProxy,
-                          isSelected: false,
+                          isSelected: spaceRoomProxy.id == context.viewState.selectedSpaceRoomID,
                           mediaProvider: context.mediaProvider) { action in
                 context.send(viewAction: .spaceAction(action))
             }
@@ -39,6 +40,16 @@ struct SpaceScreen: View {
                 .padding()
         }
     }
+    
+    var toolbar: some ToolbarContent {
+        // Use the same trick as the RoomScreen for a leading title view that
+        // also hides the navigation title.
+        ToolbarItem(placement: .principal) {
+            RoomHeaderView(roomName: context.viewState.spaceName,
+                           roomAvatar: context.viewState.space.avatar,
+                           mediaProvider: context.mediaProvider)
+        }
+    }
 }
 
 // MARK: - Previews
@@ -66,6 +77,7 @@ struct SpaceScreen_Previews: PreviewProvider, TestablePreview {
         
         let viewModel = SpaceScreenViewModel(spaceRoomListProxy: spaceRoomListProxy,
                                              spaceServiceProxy: SpaceServiceProxyMock(.init()),
+                                             selectedSpaceRoomPublisher: .init(nil),
                                              mediaProvider: MediaProviderMock(configuration: .init()),
                                              userIndicatorController: UserIndicatorControllerMock())
         return viewModel