feat: add hero images and infographics to all content pages
- Add Unsplash hero images with photographer credits to 4 pages:
collective-awakening, community-sovereignty, daily-sadhana, digital-wellness
- Add AI-generated hero images (GPT-5.4-Image-2) to 5 pages:
finding-purpose, spiritual-hygiene, digital-sovereignty,
nourishing-body, grounding-nature
- Add AI-generated infographics to 4 content-rich pages:
collective-awakening (4-step circle practice + compass),
community-sovereignty (freedom network wheel),
spiritual-hygiene (frequency chart + rhythm),
daily-sadhana (sadhana mandala)
- Add CSS for .page-hero, .page-infographic, and .ai-credit styling
- All images include alt text, lazy loading, and proper credits
- Created empty overrides directory for Zensical build compatibility
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