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/BrushControls.h

@@ -0,0 +1,54 @@
+#pragma once
+#include "UI/ToolHeaderStyle.h"
+#include <functional>
+
+class EditorSession;
+class QButtonGroup;
+class QCheckBox;
+class QComboBox;
+class QLabel;
+class QSlider;
+class QToolButton;
+class SelectionAmountField;
+class SwatchButton;
+
+// Swift's BrushControls: mode, type or source; tip, opacity, mask.
+class BrushControls : public ToolHeaderBar {
+    Q_OBJECT
+public:
+    explicit BrushControls(EditorSession &session, QWidget *parent = nullptr);
+
+private:
+    // A segment of Swift's segmented picker: one checkable button.
+    QToolButton *choice(QButtonGroup *group, const QString &name, const QString &text, const QString &tip, const std::function<void()> &pick);
+    QSlider *slider(const QString &name, int low, int high, const std::function<void(int)> &change);
+    void synchronize();
+
+    EditorSession &m_session;
+    QButtonGroup *const m_modes;
+    QToolButton *const m_paint;
+    QToolButton *const m_erase;
+    // The Smear's mode, Swift's second segmented picker.
+    QButtonGroup *const m_blurModes;
+    // Spot Healing's type, Swift's `spotHealingType` picker.
+    QButtonGroup *const m_healingTypes;
+    // Clone Stamp's options: Aligned, and what it samples.
+    QCheckBox *const m_aligned;
+    QButtonGroup *const m_samples;
+    QToolButton *const m_thisLayer;
+    QToolButton *const m_allLayers;
+    SelectionAmountField *const m_size;
+    // Sliders step in thousandths, fields show whole percents.
+    QSlider *const m_hardnessSlider;
+    SelectionAmountField *const m_hardness;
+    QLabel *const m_opacityLabel;
+    QSlider *const m_opacitySlider;
+    SelectionAmountField *const m_opacity;
+    QLabel *const m_paintLabel;
+    QComboBox *const m_maskPaint;
+    // The foreground colour, the rail swatch's own picker.
+    QLabel *const m_colourLabel;
+    SwatchButton *const m_colour;
+    QLabel *const m_cloneNote;
+    QLabel *const m_mask;
+};