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/TransformInspector.h

@@ -0,0 +1,73 @@
+#pragma once
+#include "Document/EditorSession.h"
+#include "UI/ToolHeaderStyle.h"
+#include <QCheckBox>
+#include <QComboBox>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QScrollArea>
+#include <QToolButton>
+#include <functional>
+
+// A labelled number, typed at once, stepped by arrows.
+class TransformValueField : public QWidget {
+    Q_OBJECT
+public:
+    TransformValueField(const QString &label, const QString &suffix, EditorSession &session, std::function<void(double)> change,
+                        QWidget *parent = nullptr);
+
+    // Shown when the field is not being edited.
+    void sync(double value);
+    // No idle zeros on a whole number, two decimals otherwise.
+    static QString formatted(double value);
+
+    QLineEdit *const field;
+
+protected:
+    bool eventFilter(QObject *watched, QEvent *event) override;
+
+private:
+    EditorSession &m_session;
+    const std::function<void(double)> m_change;
+    double m_value = 0;
+    // A menu or popup borrows the focus: the typing stays.
+    bool m_borrowed = false;
+};
+
+// The Move tool's bar: numbers, settings, Apply and Cancel.
+class TransformInspector : public ToolHeaderBar {
+    Q_OBJECT
+public:
+    explicit TransformInspector(EditorSession &session, QWidget *parent = nullptr);
+
+protected:
+    // Return applies and Escape cancels outside the fields.
+    void keyPressEvent(QKeyEvent *event) override;
+    void changeEvent(QEvent *event) override;
+
+private:
+    void applyLockIcon();
+    LayerTransform value() const;
+    QSizeF pixelSize() const;
+    void change(const std::function<void(LayerTransform &)> &update);
+    // Swift's `resize`; the name would hide QWidget's.
+    void resizeBox(double number, bool width);
+    void synchronize();
+
+    EditorSession &m_session;
+    // The layer the fields were built for, as Swift's `.id`.
+    std::optional<QUuid> m_layerID;
+    QCheckBox *const m_autoSelect;
+    QCheckBox *const m_showControls;
+    QScrollArea *const m_fields;
+    TransformValueField *const m_x;
+    TransformValueField *const m_y;
+    TransformValueField *const m_width;
+    TransformValueField *const m_height;
+    QToolButton *const m_lock;
+    TransformValueField *const m_scale;
+    TransformValueField *const m_rotation;
+    QComboBox *const m_sampling;
+    QPushButton *const m_cancel;
+    QPushButton *const m_apply;
+};