- Add overscroll-behavior: contain to all in-modal/popup scroll
containers (Modal body, EntitySelect, MultiEntitySelect, IconPicker,
IconGridSelect, SearchPalette, TimezoneSelector) so reaching the
inner scroll boundary no longer scrolls the page underneath.
- Telegram bot Discover Chats no longer collapses the existing chat
list into a "Loading…" placeholder. Split chatsLoading (initial)
from chatsRefreshing (Discover); rows are keyed by chat.id with
flip+fade animations; the list dims with a sweeping shimmer bar
while the Discover button shows a spinning icon and "Discovering
chats…" label. Honors prefers-reduced-motion.
alexei.dolgolyov
9afd38e50e