Only the chat LIST had styled scrollbars; the chat message area and every other scroll
region fell back to the OS scrollbar, which in the Electron/Windows shell shows classic
up/down stepper arrows. Added a global ::-webkit-scrollbar style (thin, rounded thumb,
scrollbar-button hidden) + scrollbar-width:thin to home.html, share.html, connect.html,
dashboard.html. (home build batch18)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>