Enabled page transitions

lib/app.dart

@@ -57,7 +57,7 @@ class _AppState extends State<App> {
       decoration: const NavBarDecoration(
         border: Border.symmetric(vertical: BorderSide.none, horizontal: BorderSide(color: Colors.grey, width: 1))
       ),
-      screenTransitionAnimation: const ScreenTransitionAnimation(animateTabTransition: false, curve: Curves.ease, duration: Duration(milliseconds: 200)),
+      screenTransitionAnimation: const ScreenTransitionAnimation(animateTabTransition: true, curve: Curves.ease, duration: Duration(milliseconds: 200)),
       screens: const [
         Breaker(breaker: BreakerArea.timetable, child: Timetable()),
         Breaker(breaker: BreakerArea.talk, child: ChatList()),