Build an editable PowerPoint (.pptx, base64) from a JSON description of the slides, from freedailypro. Each slide takes title, subtitle, bullets (strings, or {text, bullets:[...]} for sub-bullets; set numbered true for 1. 2. 3.), text (a paragraph or list of paragraphs), table ({header:[...], rows:[[...]]}), image ({data: base64 or data: URI of a PNG, JPEG or GIF, alt: description}) and notes (speaker notes). A slide with only a title (and subtitle) is a cover when it is first or has a subtitle; layout "title" or "content" forces it. With an image the text sits on the left and the picture on the right, keeping its shape; an image alone is centred. Bullets, text and subtitle accept **bold**, *italic*, `code` and [links](https://example.com); titles and table cells are plain text. Pictures are never fetched from a URL: send base64, and give each an alt text (a warning says when it is missing). Limits: 200 slides, 40 bullets per slide, tables of 60 rows and 12 columns (a table over 14 rows will run off the slide: warning), pictures 8 MB each and 24 MB in all. Themes clean, dark, corporate, warm, minimal, or brand {color, headingFont, bodyFont, dark}. Returns fileName, base64, slides and warnings; invalid input errors name the field, for example slides[2].bullets[1] must be text.