v0.10.4

Fixed

• Web UI previews no longer go stale when a slide is edited without being measured.
  run_python used to regenerate the live-preview data (compose/) and preview images only
  for the measure_slides slugs, so a slide written in the same call but not listed — or a
  slide the layout pass wrote but did not sample — kept its old (or no) preview. Rendering now
  follows the change: every slide the written files can alter (the slide itself, slides
  referencing a changed includes/ file, override children, or every slide when deck.json
  / specs/outline.md changed) is re-rendered, plus the measure_slides slugs. Measurement
  (overflow, layout bias, invalid layouts) still covers only measure_slides. Applies to both
  the local and the AWS server. A layout pass now renders every slide it writes, so that call
  takes longer.