The slide editor draws a title slide's image as a full-bleed darkened
background, but pptx_gen.py's make_title_slide ignored image_path entirely
and only drew the skin background — so photo backgrounds showed in the
editor but vanished from the generated PPTX / preview.
- make_title_slide now renders image_path full-bleed (cover) with a dark
overlay and white title/subtitle, matching the editor preview.
- Add set_shape_fill_opacity() that injects OOXML <a:alpha>, since
python-pptx's fill.transparency is a silent no-op (the overlay was
rendering as fully opaque black). Apply it to the fullscreen bottom bar too.
- Pass project_dir/workspace_path/warnings into make_title_slide.
- Bump version to 2.8.2.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
kimandClaude Opus 4.8
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