pg:next, pg:prev and pg:none were missing from isClientSelfCallback, so the callback gate dropped every page tap from a non-admin and a client with several accounts was stuck on page one. Paging only re-renders the screen stored for the caller's own chat, so the gate now lets it through. An account's links screen also shows that account's usage to its owner instead of the admin-only client card button. Fixes#7032.
Every bot message is sent HTML-parsed while the intended markup lives
in the translation templates, yet the values filled into them were
escaped only at some call sites. Remarks and e-mails, which a node
chooses for the inbounds it reports, reached the scheduled report and
the client info unescaped and turned into markup, and the reports that
escaped their whole text instead showed the templates' own tags.
I18nBot now escapes every parameter value, the call sites drop their
own escaping and the whole-report escapes, the two values concatenated
outside a template are escaped where they are written, and callback
answers, which are plain text, are unescaped again.
The bot answered every action with a new message, so a chat filled with stale
menus whose buttons still acted, and long client or inbound lists were paged
through dozens of buttons. Each chat now has one live screen that is edited in
place: the menu is grouped into Server, Clients, Traffic and Maintenance, lists
open through inline search, the add-client flow starts from a draft card, QR
codes arrive as one labelled sheet, and repeated notices collapse into one with
a counter. A client's /start and /usage show only that client's own links and
usage, groups are refused, and the settings page warns when the bot's inline
mode is off. Admin topics, the indexed Telegram lookup and every locale,
Slovak included, carry over.