Create OG image PNG (1200x630px) for social sharing

[simonCatBot]

Issue

Open Graph image references og-image.svg but social platforms prefer PNG format (1200x630px).

Problem

• Facebook, LinkedIn prefer PNG over SVG for OG images
• SVG support varies across social media crawlers

Suggested Fix

1. Create og-image.png (1200x630px)
2. Update meta tags to reference PNG version
3. Keep SVG as fallback

Priority

Low - site works, but social shares may look suboptimal