FrankZamora 179a83e9cd feat(js): implement intersection observer lazy loading for adsense ...

- Add per-slot lazy loading with Intersection Observer API
- Implement fill detection via MutationObserver and data-ad-status
- Add configurable rootMargin and fillTimeout from database
- Generate dynamic CSS based on lazy_loading_enabled setting
- Add legacy mode fallback for browsers without IO support
- Include backup of previous implementation (adsense-loader.legacy.js)
- Add OpenSpec documentation with test plan (72 tests verified)

Schema changes:
- Add lazy_loading_enabled (boolean, default: true)
- Add lazy_rootmargin (select: 0-500px, default: 200)
- Add lazy_fill_timeout (select: 3000-10000ms, default: 5000)

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-10 15:48:20 -06:00

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