Feature S337 is now live on all 130 HTML pages: press '?' anywhere to open a Keyboard Shortcut Help Modal listing all 4 active shortcuts (?, L, T, Esc). The 'T' key now scrolls to top with reduced-motion respect, Esc closes the modal with priority handling that avoids conflicts with the Reading List panel. Bilingual EN/ZH labels, dark-mode compliant, print-hidden, Analytics-Ceiling compliant. Two commits (71a87a4 + c579390) deployed via single-pass HTML injection. This brings the wellbeing companion site to 23 UX features -- and no sign of slowing.