fix: Corregir versiones de npm y imports ESM de Baileys

- Downgrade a Nuxt 3.14.0 (Nuxt 4 no existe todavía)
- Downgrade @nuxt/ui a ^3.0.0
- Downgrade Baileys a ^6.7.9 (versión estable)
- Corregir imports ESM de Baileys en auth-state.ts y manager.ts
- Remover compatibilityDate (específico de Nuxt 4)

server/services/baileys/manager.ts

@@ -2,15 +2,15 @@
  * BaileysManager - Manages multiple WhatsApp instances
  * Singleton pattern for managing all Baileys connections
  */
-import makeWASocket, {
+import type { WASocket, BaileysEventMap } from '@whiskeysockets/baileys'
+import pkg from '@whiskeysockets/baileys'
+const {
+  default: makeWASocket,
   DisconnectReason,
   fetchLatestBaileysVersion,
   makeCacheableSignalKeyStore,
-  useMultiFileAuthState,
-  type WASocket,
-  type BaileysEventMap,
   Browsers
-} from '@whiskeysockets/baileys'
+} = pkg
 import { Boom } from '@hapi/boom'
 import { EventEmitter } from 'events'
 import QRCode from 'qrcode'