After the token is in .env, call
https://api.telegram.org/bot<TOKEN>/getMe — if ok, extract the bot's
username and \`open tg://resolve?domain=<username>\` so the Telegram
desktop app lands on the bot chat. When pair-telegram prints the
4-digit code a moment later, the user just types it into the already-
open chat instead of hunting for their bot.
Falls back to https://t.me/<username> if the tg:// scheme isn't
registered, and just warns-and-continues if getMe fails (network
hiccup shouldn't block setup).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
e7d798b00d