pub fn icon_path(name: &str) -> Option<PathBuf>Expand description
Resolve a theme-relative icon name to an absolute path inside the
active theme’s icons/catalogue/ tree.
name is the slash-separated path without the .svg
extension (e.g. "general/right-simple",
"system/wifi-signal-full"). The lookup tries the
catalogue/filled/<name>.svg variant first and falls back to
catalogue/line/<name>.svg; returns None when neither file
exists or the active document has no on-disk root.