feat(loop): extract desktop file and icons from AppImage

- Use appimageTools.extractType2 to access embedded assets
- Install loop-desktop.desktop and rewrite Exec=AppRun → Exec=loop
- Copy hicolor icons (16–1024px) from AppImage tree

packages/loop/package.nix

@@ -6,22 +6,35 @@
 
 let
   version = "6.0.3";
-in
-
-appimageTools.wrapType2 {
-  pname = "loop";
-  inherit version;
-
   src = fetchurl {
     url = "https://artifacts.wilix.dev/repository/loop-files/loop-${version}/loop-desktop-${version}-linux-x86_64.AppImage";
     hash = "sha256-zGWKlY6XwuL0e2mDpB/1t0UnW73bhCPcg6XkBJBCEFY=";
   };
+  appimageContents = appimageTools.extractType2 {
+    pname = "loop";
+    inherit version src;
+  };
+in
+
+appimageTools.wrapType2 {
+  pname = "loop";
+  inherit version src;
 
   extraPkgs = pkgsWith: [
     pkgsWith.gtk3
     pkgsWith.glib
   ];
 
+  extraInstallCommands = ''
+    mkdir -p $out/share/applications
+    install -m 444 ${appimageContents}/loop-desktop.desktop $out/share/applications/loop.desktop
+    substituteInPlace $out/share/applications/loop.desktop \
+      --replace-fail 'Exec=AppRun   %U' 'Exec=loop %U'
+
+    mkdir -p $out/share/icons/hicolor
+    cp -r ${appimageContents}/usr/share/icons/hicolor/* $out/share/icons/hicolor/
+  '';
+
   passthru = {
     category = "Communication";
     updateScript = [
@@ -31,13 +44,13 @@ appimageTools.wrapType2 {
     ];
   };
 
-  meta = with lib; {
+  meta = {
     description = "Corporate messenger for your team";
     homepage = "https://loop.ru";
-    license = licenses.unfree;
+    license = lib.licenses.unfree;
-    maintainers = with maintainers; [ ];
+    maintainers = [ ];
     platforms = [ "x86_64-linux" ];
     mainProgram = "loop";
-    sourceProvenance = with sourceTypes; [ binaryNativeCode ];
+    sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
   };
 }