New tooltip.js module with styled tooltips (data-tip) and multi-line inline help (data-help). Migrates all ~70 native title attributes across index.php, JS modules, and all plugins. Adds inline help on 9 strategic UI elements (split, superview, zen, extract, assets, etc). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>