STAK pre-launch campaign kit. 18 ads + 10 carousel slides. Formats: feed 1080x1350, story 1080x1920, square 1080x1080. Arabic and English. Generated illustrative artwork and sample UI, not customer testimonials. These are preview creatives: use a live demo destination before placing ads. Native apps are in development. Do not add store badges until releases are approved. See launch-kit/LAUNCH-PLAN.md for the complete readiness gates.