pub fn resolve_asset_dir(rel: &str) -> Option<PathBuf>Expand description
Resolve a data-asset directory (an AssetDir’s /-relative path) to its on-disk
location, for consumers whose local-content channel is a file URL, like the inline web
view on the Apple backends (day-piece-webview’s docs/webview.md). Same probe order as file
resolution: DAY_ASSET_ROOT (dev / day launch), then the bundle-relative roots.