Align SRP boundaries and editor windowing

editor/app/Composition/EditorShellDrawComposer.cpp

@@ -20,6 +20,20 @@ namespace {
 using ::XCEngine::UI::UIDrawData;
 using ::XCEngine::UI::UIDrawList;
 
+class BuiltInIconResolver final : public UIEditorShellIconResolver {
+public:
+    explicit BuiltInIconResolver(const BuiltInIcons& icons)
+        : m_icons(icons) {}
+
+    const ::XCEngine::UI::UITextureHandle* TryResolveIcon(
+        std::uint8_t iconKind) const override {
+        return &m_icons.Resolve(static_cast<BuiltInIconKind>(iconKind));
+    }
+
+private:
+    const BuiltInIcons& m_icons;
+};
+
 UIEditorShellComposeModel BuildShellComposeModelFromFrame(
     const UIEditorShellInteractionFrame& frame) {
     UIEditorShellComposeModel model = {};
@@ -80,6 +94,7 @@ void EditorShellDrawComposer::Append(
     const auto& palette = ResolveUIEditorShellInteractionPalette();
     const UIEditorShellComposeModel shellComposeModel =
         BuildShellComposeModelFromFrame(context.shellFrame);
+    const BuiltInIconResolver iconResolver(context.builtInIcons);
 
     AppendDrawPacket(
         drawData,
@@ -92,7 +107,7 @@ void EditorShellDrawComposer::Append(
                 context.shellInteractionState.composeState,
                 palette.shellPalette,
                 metrics.shellMetrics,
-                &context.builtInIcons);
+                &iconResolver);
         });
     AppendDrawPacket(
         drawData,