Release 1.1.3 with game window and Gamescope lifecycle fixes

native/gamescope/README.md

@@ -0,0 +1,53 @@
+# Gamescope compatibility build provenance
+
+This directory is the canonical source record for the patched Gamescope helper
+shipped by the launcher. The executable remains in the Python package because
+runtime lookup and installed paths are compatibility interfaces.
+
+## Artifact
+
+| Property | Recorded value |
+| --- | --- |
+| Source package | Ubuntu `gamescope 3.16.20+ds-1` |
+| Build environment | `ubuntu:26.04` container |
+| Target | Ubuntu 26.04, amd64, Linux x86-64 baseline |
+| Packaged source | `src/ptlinux/native/gamescope-3.16.20-ubuntu26.04-amd64` |
+| Installed path | `ptlinux/native/gamescope-3.16.20-ubuntu26.04-amd64` |
+| ELF build ID | `165d21610879119d75ab8e4c3d7389d8f0743926` |
+| SHA-256 | `3fc81536c22dcce2c593c11507a612c13221f5b2ce2e5326f7c63706ca965639` |
+
+`source.sha256` records the exact Ubuntu source archives. Obtain both archives
+without renaming them and place them in
+`.artifacts/native/gamescope/sources/`:
+
+- `gamescope_3.16.20+ds.orig.tar.xz`
+- `gamescope_3.16.20+ds-1.debian.tar.xz`
+
+The patches are applied in this order:
+
+1. `gamescope-wayland-letterbox-backing.patch`
+2. `gamescope-wayland-libdecor-input-scope.patch`
+3. `gamescope-lazy-output-images.patch`
+4. `gamescope-wayland-live-resize.patch`
+5. `gamescope-keep-nested-windows-visible.patch`
+
+## Build
+
+Run the recipe from any directory:
+
+```text
+./native/gamescope/build.sh
+```
+
+Pass a different source-archive directory as the first argument and an output
+directory as the second argument when needed. Set `CONTAINER_ENGINE` to select
+Docker or Podman explicitly. The recipe builds with `dpkg-buildpackage` in an
+Ubuntu 26.04 amd64 container, writes below `.artifacts/` by default, and checks
+the result against `binary.sha256`. It refuses to write over the shipped helper.
+The container downloads build dependencies, so the Ubuntu 26.04 package
+repositories used at build time remain part of the build environment.
+
+The files named `gamescope-compat.README`, `gamescope-compat.copyright`, and the
+five patches continue to be staged at their historical flat installed paths.
+The full Debian copyright record is retained in
+`gamescope-compat.copyright`.