fix: remove ANTHROPIC_API_KEY requirement, use claude.ai subscription auth

src/index.ts

@@ -3,11 +3,9 @@ import { createBot } from "./bot.js";
 
 const token = process.env.TELEGRAM_BOT_TOKEN;
 const ownerId = process.env.TELEGRAM_OWNER_ID;
-const apiKey = process.env.ANTHROPIC_API_KEY;
 
 if (!token) throw new Error("TELEGRAM_BOT_TOKEN is required");
 if (!ownerId) throw new Error("TELEGRAM_OWNER_ID is required");
-if (!apiKey) throw new Error("ANTHROPIC_API_KEY is required");
 
 const bot = createBot(token, Number(ownerId));