feat(panel): panel web multilingüe con caché de traducciones en MySQL y soporte nest-asyncio

panel/main.py

@@ -10,6 +10,8 @@ from fastapi.responses import RedirectResponse
 from pydantic import BaseModel
 
 from botdiscord.config import load_config, get_web_config, get_libretranslate_url, get_db_type
+from botdiscord.database import get_ui_translation, save_ui_translation
+from botdiscord.translate import translate_text
 
 app = FastAPI(title="Panel de Configuración - Bots de Traducción")
 
@@ -17,6 +19,45 @@ SCRIPT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
 templates = Jinja2Templates(directory=os.path.join(SCRIPT_DIR, "panel", "templates"))
 
+# Filtro de traducción para Jinja2
+def translate_filter(text, lang="es"):
+    if lang == "es" or not text:
+        return text
+    
+    # Buscamos en caché de la base de datos (acceso rápido)
+    from botdiscord.database import get_ui_translation, save_ui_translation
+    cached = get_ui_translation(text, lang)
+    if cached:
+        return cached
+    
+    # Si no está en caché, traducimos de forma síncrona para la UI
+    from botdiscord.translate import translate_text_sync
+    translated = translate_text_sync(text, lang)
+    
+    if translated and translated != text:
+        save_ui_translation(text, lang, translated)
+        
+    return translated
+
+templates.env.filters["translate"] = translate_filter
+
+@app.get("/set-lang/{lang}")
+async def set_lang(lang: str, request: Request):
+    # Validamos que el idioma sea de 2 letras
+    if len(lang) != 2:
+        return RedirectResponse(url="/dashboard")
+        
+    response = RedirectResponse(url=request.headers.get("referer", "/dashboard"))
+    response.set_cookie(key="panel_lang", value=lang, max_age=31536000) # 1 año
+    return response
+
+def get_panel_lang(request: Request):
+    lang = request.cookies.get("panel_lang")
+    if not lang:
+        accept_lang = request.headers.get("accept-language", "es")
+        lang = accept_lang.split(",")[0].split("-")[0]
+    return lang
+
 class LoginForm(BaseModel):
     username: str
     password: str