Add StartupWMClass=OrbitHub to the desktop file so panels (GNOME
Shell, Cinnamon, KDE) can match the running window to the pinned
launcher instead of creating a duplicate taskbar entry.
Replace the hand-authored, stale launcher SVG with PNG icons
rendered directly from createOrbitHubAppIcon() at each hicolor
theme size, so the pinned/menu icon matches the actual app icon
shown in the running window, Windows .ico, and macOS .icns.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
