screencast_icon/ holds the single source icon set; meson install ships
the 256 px PNG into the hicolor theme for the GTK panel (themed icon
name) and the waybar CSS, and a custom target embeds it as
icon_png_data.h so the SDL receiver window sets it via SDL_SetWindowIcon
with an optional SDL3_image dependency (built-in find_library, since no
pkg-config file ships with it).
