v0.26.3

Fixed

• input_not_found named nothing. "input %q is not in the workspace —
  place it there first" does not say where the workspace is, and it reaches the
  model on every init, mask, control and upscale input. It now names the
  absolute path it looked at. (Found on voice-scribe with a real agent, which
  answered that sentence by inventing a directory and spent four rounds
  recovering; these servers share the workspace code.)