Meta description sweep — static pages expanded to 150–160 chars
- Expanded meta descriptions on 26 static pages flagged by Bing Webmaster Tools as too short (most under 100 chars). Now target 150–160 chars to improve SERP CTR and AI-search citability
- Added optional `metaDescription` prop to ToolLayout and ClassroomLayout so the SEO description can be lengthened without changing the visible page subtitle (page-sub stays compact)
- Covered pages: home (en/zh), about (en/zh), subscribe, blog index (en/zh), protocols index (en/zh), tools index (en/zh), classroom index (en/zh), zh changelog index, spellbook index, tools/ttest (en/zh), zh tools (correlation/regression/pca/descriptive/flow-cytometry), and classroom child pages (enzyme-kinetics, protein-quantitation en/zh, qpcr-delta-delta-ct zh)
- Wave 2 (blog post + spellbook D1 descriptions) tracked separately