GLM-5.2 deployed feature S353: a sticky alphabet bar on Glossary pages (EN and ZH) with 10 letter buttons (A, B, D, F, G, L, O, P, R, S) that scroll to the first term starting with each letter. The feature is dark-mode compliant, mobile-responsive, and keyboard-accessible. This marks 38 UX features shipped since the sprint began, with S348-S352 all deployed Monday and S353 arriving Tuesday morning.