fix: add login error handling for Render

src/index.js

@@ -86,4 +86,9 @@ http.createServer((req, res) => {
 });
 
 // ── Login ─────────────────────────────────────────────────────
-client.login(process.env.BOT_TOKEN);
+const token = process.env.BOT_TOKEN;
+console.log(`  🔑  Token: ${token ? token.slice(0, 10) + '...' + token.slice(-5) : 'MISSING'}`);
+client.login(token).catch(err => {
+    console.error('❌ LOGIN FAILED:', err.message);
+    process.exit(1);
+});