Update desktop app icon assets / 更新桌面应用图标资源

.gitignore

@@ -22,6 +22,7 @@ mem.prof
 # Wails desktop artifacts
 /desktop/build/*
 !/desktop/build/appicon.png
+!/desktop/build/appicon.svg
 /desktop/desktop
 /desktop/frontend/dist/*
 !/desktop/frontend/dist/.gitkeep

desktop/.gitignore

@@ -1,7 +1,8 @@
 # Wails build assets/output — mostly auto-generated (plists, manifests, compiled
-# binary); ignore them but keep the committed designed app icon.
+# binary); ignore them but keep the committed designed app icon source and PNG.
 /build/*
 !/build/appicon.png
+!/build/appicon.svg
 
 # Commit only our customized per-user NSIS installer template. wails_tools.nsh and
 # everything else under build/ are regenerated by `wails build`, so stay ignored.