locker: Rely on cosmic-bg for showing background

Requires https://github.com/pop-os/cosmic-comp/pull/2792 and
https://github.com/pop-os/cosmic-bg/pull/144.

Cargo.lock

@@ -1336,6 +1336,7 @@ dependencies = [
  "cosmic-settings-accessibility-subscription",
  "cosmic-settings-daemon-config",
  "dirs",
+ "enumflags2",
  "futures-util",
  "greetd_ipc",
  "i18n-embed",

Cargo.toml

@@ -88,6 +88,7 @@ image = { version = "0.25", default-features = false, features = [
 ] }
 # JPEG-XL support
 jxl-oxide = { version = "0.12.6", features = ["image"] }
+enumflags2 = "0.7.12"
 
 [dependencies.greetd_ipc]
 version = "0.10.3"

src/locker.rs

@@ -663,6 +663,7 @@ impl cosmic::Application for App {
     /// Creates the application, and optionally emits command on initialize.
     fn init(mut core: Core, flags: Self::Flags) -> (Self, Task<Self::Message>) {
         core.set_app_type(cosmic::core::AppType::System);
+        core.set_auto_blur(enumflags2::BitFlags::empty());
         let (mut common, common_task) = Common::init(core);
         common.on_output_event = Some(Box::new(|output_event, output| {
             Message::OutputEvent(output_event, output)
@@ -1173,17 +1174,8 @@ impl cosmic::Application for App {
     }
 
     /// Creates a view after each update.
-    fn view_window(&self, surface_id: SurfaceId) -> Element<'_, Self::Message> {
-        let img = self
-            .common
-            .surface_images
-            .get(&surface_id)
-            .unwrap_or(&self.common.fallback_background);
-        widget::image(img)
-            .content_fit(iced::ContentFit::Cover)
-            .width(Length::Fill)
-            .height(Length::Fill)
-            .into()
+    fn view_window(&self, _surface_id: SurfaceId) -> Element<'_, Self::Message> {
+        widget::space::horizontal().into()
     }
 
     fn subscription(&self) -> Subscription<Self::Message> {