flake.nix: fix missing shell payload and kirigami QML imports

[Pigbuy]

Changes

Three fixes for the Nix package derivation so it works out of the box on NixOS:

1. Root-level QML files not copied to payload

The installPhase only copied files from sdata/runtime-root-files.txt and directories from sdata/runtime-payload-dirs.txt. Root QML entry points like shell.qml, settings.qml, etc. were left behind. The makeWrapper sets INIR_SYSTEM_RUNTIME_DIR to $out/share/quickshell/inir, but shell.qml wasn't there, so inir run errored with "Could not find an iNiR shell payload".

Fix: Added a glob loop in installPhase to copy all *.qml files from the source root into the runtime directory.

2. kirigami-wrapped has no QML files

The qmlDeps function used optionalKde pkgs "kirigami", which on nixpkgs >=25.05 resolves to kirigami-wrapped — a wrapper package with an empty lib/qt-6/qml/ directory. The actual org.kde.kirigami QML module lives in the unwrapped kirigami package (passthru.unwrapped).

Fix: In qmlDeps, access pkgs.kdePackages.kirigami.passthru.unwrapped directly instead.

3. patchShebangs can mangle Python scripts

During fixupPhase, patchShebangs processes all executable files. Python scripts with #!/usr/bin/env python3 get rewritten.

Fix: Standard Nixpkgs pattern — preFixup removes execute bits from .py files so patchShebangs skips them, postFixup restores them.

Yes I used AI for this but it works so better than nothing

[snowarch]

Thanks @Pigbuy — accepted, and a clear writeup. Cherry-picked into prerelease; all three Nix fixes (root *.qml into the payload, unwrapped kirigami, the patchShebangs guard) ship to main next release.