feat: theme integration

refactor: only apply updates if there is a change in the theme

refactor: include theme in state

cleanup: theme integration

src/wayland/handlers/screencopy.rs

@@ -43,7 +43,7 @@ use crate::{
     backend::render::{
         cursor,
         element::{AsGlowRenderer, CosmicElement},
-        render_output, render_workspace, CursorMode, CLEAR_COLOR,
+        render_output, render_workspace, CursorMode,
     },
     shell::{CosmicMappedRenderElement, CosmicSurface, WorkspaceRenderElement},
     state::{BackendData, ClientState, Common, State},
@@ -1015,7 +1015,12 @@ pub fn render_window_to_buffer(
             renderer.bind(render_buffer).map_err(DTError::Rendering)?;
         }
 
-        dt.render_output(renderer, age, &elements, CLEAR_COLOR)
+        dt.render_output(
+            renderer,
+            age,
+            &elements,
+            crate::theme::clear_color(common.theme.cosmic()),
+        )
     }
 
     let node = node_from_params(&params, &mut state.backend, None);

src/wayland/handlers/xdg_shell/mod.rs

@@ -220,6 +220,7 @@ impl XdgShellHandler for State {
                             CosmicMapped::from(CosmicWindow::new(
                                 surface,
                                 self.common.event_loop_handle.clone(),
+                                self.common.theme.clone(),
                             )),
                             if workspace.is_tiled(&mapped) {
                                 ManagedLayer::Tiling