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 | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 364a14d..a8a1205 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,7 +3,6 @@ use std::collections::HashMap;
 use zbus::zvariant::Value;
 use zbus::{connection, interface};
 
-use wayland_client::QueueHandle;
 
 use cce_ui::engine::{
     Application, EngineState, LayerAnchor, LayerKeyboardInteractivity, LayerKind, LayerSettings,
@@ -605,7 +604,9 @@ impl Application for NotifierApp {
         true
     }
 
-    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 {
             seen_renderer: false,
             hidden_since_renderer: false,