Instead of lazy loading slots when they enter the viewport (which
causes layout shift when unfilled slots collapse), now all slots
are activated immediately on page load.
- Slots start collapsed (max-height:0, opacity:0) via CSS
- All slots are activated with 100ms stagger to avoid rate limiting
- Only slots confirmed as 'filled' expand and become visible
- Unfilled slots remain collapsed - zero layout shift
This completely eliminates the CLS issue where content would jump
when ad slots were hidden after entering the viewport.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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