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/Document/FloatingSelection.h

@@ -0,0 +1,23 @@
+#pragma once
+#include "Document/EditorSession+Model.h"
+#include "Document/LayerTransform.h"
+#include <QImage>
+
+// Ctrl+T with a selection: the pixels float, then merge back.
+struct FloatingTransform {
+    QUuid sourceID;
+    CanvasDocument before;
+    std::optional<QUuid> beforeActive;
+    LayerTransform original;
+    QSizeF pixelSize;
+};
+
+// Floating pixels drawn back onto their layer, grown as needed.
+namespace FloatingMerge {
+struct Merged {
+    ImportedImage asset;
+    LayerTransform transform;
+    std::optional<LayerMask> mask;
+};
+Merged merge(const QImage &pixels, const LayerTransform &transform, const ImageLayer &source);
+}