fix: Simplificar traducción y corregir imports

- Eliminar segmentación, traducir texto completo de una vez
- Añadir imports faltantes get_name_to_code, get_flag_mapping
- Restaurar filtro: solo enviar botones si hay texto (sin multimedia)

botdiscord/bot.py

@@ -10,8 +10,8 @@ import html
 
 from botdiscord.config import get_discord_token, load_config, get_languages
 from botdiscord.database import init_db, get_active_languages, get_bot_languages, save_message, get_welcome_message
-from botdiscord.ui import PersistentTranslationView, ConfigView, WelcomeTranslationView
-from botdiscord.translate import get_reverse_mapping, load_lang_mappings
+from botdiscord.ui import PersistentTranslationView, ConfigView, WelcomeTranslationView, TranslationButton
+from botdiscord.translate import get_reverse_mapping, load_lang_mappings, get_name_to_code, get_flag_mapping
 
 load_config()
 
@@ -116,14 +116,14 @@ async def on_message(message):
     if message.author.bot: return
 
     text_content = message.content.strip()
-    if not text_content and not message.attachments: return
+    if not text_content: return
     
     # Filtros de stickers/emojis/etc
     if message.stickers or text_content.startswith('https://tenor.com/') or \
        re.fullmatch(r'<(a?):[a-zA-Z0-9_]+:[0-9]+>', text_content):
         return
     
-    if text_content and len(text_content) < 2: return
+    if len(text_content) < 2: return
 
     active_codes = get_active_langs_for_guild(message.guild.id)
     if not active_codes: return
@@ -141,7 +141,6 @@ async def on_message(message):
     text_to_translate = mention_pattern.sub(replace_mention, text_escaped)
     save_message(message.id, message.guild.id, message.author.id, text_to_translate, mentions_map, 'discord')
     
-    from botdiscord.ui import TranslationButton
     view = discord.ui.View(timeout=None)
     name_to_code = get_name_to_code("discord")
     flag_mapping = get_flag_mapping("discord")