fix: resolve JS and CSS lint errors across blocks

[rofe]

Summary

• article-header.js: remove trailing whitespace on 7 lines
• featured-articles.js: replace for...of + await with Promise.all, add trailing newline
• fluffyjaws-header.js: fix lines exceeding 100-char max-len, add trailing newline
• tags.js: remove unused target variable, simplify to forEach
• article-feed.css: modern color-function notation, shorthand fix
• article-header.css: short hex colors, empty line before custom property
• featured-article.css: modern color-function notation
• styles.css: disable false-positive descending-specificity for theme overrides

Before: https://main--inside-aem--adobe.aem.page/
After: https://fix-lint-errors--inside-aem--adobe.aem.page/

🤖 Generated with Claude Code

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Commits

• 3e658bc ✅ (latest)
• f8938c2 ✅