Refactor new editor boundaries and test ownership

new_editor/app/Composition/EditorWindowWorkspaceStore.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#include <XCEditor/Workspace/UIEditorWindowWorkspaceController.h>
+#include <XCEditor/Workspace/UIEditorWorkspaceController.h>
+
+#include <string>
+#include <string_view>
+
+namespace XCEngine::UI::Editor::App::Internal {
+
+class EditorWindowWorkspaceStore final {
+public:
+    explicit EditorWindowWorkspaceStore(UIEditorPanelRegistry panelRegistry);
+
+    const UIEditorPanelRegistry& GetPanelRegistry() const {
+        return m_panelRegistry;
+    }
+
+    bool HasState() const {
+        return !m_windowSet.windows.empty();
+    }
+
+    const UIEditorWindowWorkspaceSet& GetWindowSet() const {
+        return m_windowSet;
+    }
+
+    UIEditorWindowWorkspaceController BuildMutationController() const;
+
+    bool RegisterWindowProjection(
+        std::string_view windowId,
+        bool primary,
+        const UIEditorWorkspaceController& workspaceController,
+        std::string& outError);
+
+    bool CommitWindowProjection(
+        std::string_view windowId,
+        const UIEditorWorkspaceController& workspaceController,
+        std::string& outError);
+
+    bool ValidateWindowSet(
+        const UIEditorWindowWorkspaceSet& windowSet,
+        std::string& outError) const;
+
+    void ReplaceWindowSet(UIEditorWindowWorkspaceSet windowSet);
+
+    void RemoveWindow(std::string_view windowId, bool primary);
+
+private:
+    UIEditorPanelRegistry m_panelRegistry = {};
+    UIEditorWindowWorkspaceSet m_windowSet = {};
+};
+
+} // namespace XCEngine::UI::Editor::App::Internal