When telegram.org is unreachable, the synchronous script tag blocks
DOM parsing for ~51 seconds (TCP timeout), preventing the React app
from rendering and the deep link auth fallback from activating.
- Move Google Fonts from CSS @import (render-blocking) to <link> in
index.html with preconnect for earlier discovery
- Remove @import from globals.css — browser no longer waits for CSS
parse -> @import fetch -> font CSS parse before first paint
- Defer initLogoPreload() to requestIdleCallback so logo fetch
doesn't compete with critical resources during page load
