feat(i18n & ux): auditoria, traduccion completa, correcciones ux y gestion de idioma en perfil

app/__init__.py

@@ -41,28 +41,34 @@ def create_app(config_class=Config):
     app.register_blueprint(genetic_bp)
     app.register_blueprint(genetic_web_bp)
     
-# Babel language selector
+    # Language selector function
+    def get_locale():
+        # 1. Check if language is explicitly set in URL parameters
+        lang = request.args.get('lang')
+        if lang and lang in app.config['LANGUAGES']:
+            return lang
+        
+        # 2. Check if user is authenticated and has a configured language in profile
+        from flask_login import current_user
+        if current_user.is_authenticated and getattr(current_user, 'preferred_language', None):
+            if current_user.preferred_language in app.config['LANGUAGES']:
+                return current_user.preferred_language
+        
+        # 3. Check if language is stored in session (e.g. manual switcher)
+        if 'language' in session and session['language'] in app.config['LANGUAGES']:
+            return session['language']
+        
+        # 4. Check browser language preference by default (especially on login/guest)
+        return request.accept_languages.best_match(app.config['LANGUAGES']) or app.config['BABEL_DEFAULT_LOCALE']
+
+    # Babel context processor
     @app.context_processor
     def inject_conf_vars():
         return dict(
             languages=app.config['LANGUAGES'],
-            current_lang=session.get('language', request.accept_languages.best_match(app.config['LANGUAGES']) or app.config['BABEL_DEFAULT_LOCALE'])
+            current_lang=str(get_locale())
         )
-    
-    # Language selector function
-    def get_locale():
-        # 1. Check if language is explicitly set in URL parameters
-        if request.args.get('lang'):
-            lang = request.args.get('lang')
-            if lang in app.config['LANGUAGES']:
-                return lang
-        
-        # 2. Check if language is stored in session
-        if 'language' in session:
-            return session['language']
-        
-        # 3. Check browser language preference
-        return request.accept_languages.best_match(app.config['LANGUAGES']) or app.config['BABEL_DEFAULT_LOCALE']
+
     
     # Configure Babel
     babel.init_app(app, locale_selector=get_locale)