OmaPhoto 1.0.0: the Linux port of Compositor

A layered image editor for Linux and Omarchy, ported from Compositor
(github.com/robbietilton/Compositor), whose Swift source is its
specification. It reads and writes Compositor's .comp projects.

Packages for Ubuntu, Fedora and Arch come from the release workflow;
scripts/install/ holds one install script per distribution family,
and flake.nix serves NixOS.

Co-Authored-By: Claude <noreply@anthropic.com>

src/UI/ProjectWorkspaceView.h

@@ -0,0 +1,38 @@
+#pragma once
+#include "ContentView.h"
+#include "Document/ProjectWorkspace.h"
+#include "UI/CompositorMenus.h"
+#include "UI/ProjectTabs.h"
+#include <QMainWindow>
+#include <QToolBar>
+
+// The window: the front tab's editor under the tab strip.
+class ProjectWorkspaceView : public QMainWindow {
+    Q_OBJECT
+public:
+    explicit ProjectWorkspaceView(ProjectWorkspace &workspace, QWidget *parent = nullptr);
+
+    ContentView *content() const { return m_content; }
+    ProjectTabStrip *tabs() const { return m_tabs; }
+
+protected:
+    void closeEvent(QCloseEvent *event) override;
+
+private:
+    void synchronize();
+    void synchronizeSession();
+    void watchFront();
+
+    ProjectWorkspace &m_workspace;
+    QToolBar *const m_toolbar;
+    ProjectTabStrip *const m_tabs;
+    QAction *m_newCanvas = nullptr;
+    QAction *m_fit = nullptr;
+    QAction *m_actualPixels = nullptr;
+    QAction *m_zoomIn = nullptr;
+    QAction *m_zoomOut = nullptr;
+    ContentView *m_content = nullptr;
+    // Held until its editor goes, as Swift's views hold sessions.
+    std::shared_ptr<ProjectTab> m_shownTab;
+    QMetaObject::Connection m_sessionWatch;
+};