Export PPTX

Screenshot-based PPTX export — each <section> inside <deck-stage> becomes one slide (1920×1080 image + optional speaker notes).

Preflight

1. Bash(which node) — if missing, tell user to install Node 20+
2. Check package.json has pptxgenjs + puppeteer — if not, run:

   Bash(npm install -D pptxgenjs puppeteer)
   

   (or tell user to run /doctor first)

Steps

1. Resolve paths:
   • $0 = deck HTML (required)
   • $1 = output (default: basename + .pptx)