eframe's web runner doesn't handle ViewportCommand::Title, so the web
build never named what was open, and a host embedding the page could
only guess whether a dropped file had opened. The page title is now
"<file name> — LightCraft" for the active photo, with " •" after the
name while changes are not yet written to browser storage, and the
window title when no photo is active. It is set only when it changes.
Bruno-Alumn
8ef46aa088