refactor: build the app with Application::create

Application::new(qh, sender) took the session's Wayland queue handle,
which no client ever used, and calloop's sender; cce-ui is retiring it
for create(sender: AppSender<_>), which names no window system. The
body is unchanged: an app that keeps calloop's sender converts the
AppSender into it on the first line, and the now-unused QueueHandle and
EngineState imports go.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

 src/main.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index d25893e..6ee6e71 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,9 +7,8 @@
 
 mod tiles;
 
-use wayland_client::QueueHandle;
 
-use cce_ui::engine::{Application, EngineState, LogicalPosition, LogicalSize, WindowSettings};
+use cce_ui::engine::{Application, LogicalPosition, LogicalSize, WindowSettings};
 use cce_ui::scene::layout::Rect;
 use cce_ui::scene::paint::{DisplayList, PaintCtx};
 use cce_ui::widget::scroll_motion::{current_scroll_phase, scroll_settings, ScrollPhase};
@@ -116,7 +115,9 @@ impl MapApp {
 impl Application for MapApp {
     type Message = Message;
 
-    fn new(_qh: &QueueHandle<EngineState<Self>>, sender: calloop::channel::Sender<Self::Message>) -> Self {
+    fn create(sender: cce_ui::engine::AppSender<Self::Message>) -> Self {
+        // The app keeps calloop's sender; `AppSender` converts into it.
+        let sender: calloop::channel::Sender<Self::Message> = sender.into();
         Self {
             tiles: TileManager::new(sender),
             seen_renderer: false,