v0.2.4

• snapshot() gains hideOverlays?: string[] — overlay ids to hide only for the
  capture (e.g. editing handles/guides), restored after, so the snapshot shows the
  clean drawing without the construction chrome. Also on the toolbar config
  (snapshot: { hideOverlays: [...] }).
• Removed the basemap snapshot option: hiding only the tiles can't be done cleanly in
  a generic, domain-free way (the host map's basemap vs. domain layers like FIR are
  indistinguishable, and the GL canvas isn't guaranteed transparent).