feat: Implement main application shell with navigation and color scheme toggle

- Added Appshell component with responsive navbar and main content area
- Integrated ColorSchemeToggle for light/dark mode switching
- Created Welcome component with styled title and introductory text
- Developed ChatPage for LLM interaction with WebSocket support
- Implemented Biblioteca for managing notes with rich text editor
- Added LoginPage for user authentication with error handling
- Introduced MessageList and MessageBubble components for chat messages
- Styled components with CSS modules for consistent design

domains/Logger/logger_db.py

@@ -0,0 +1,62 @@
+from loguru import logger
+from sqlalchemy import Column, Integer, String, Text, TIMESTAMP
+from sqlalchemy.orm import sessionmaker
+from sqlalchemy.exc import SQLAlchemyError
+
+from domains.ArquitectureLayer.Model import Model_base
+from domains.ConexionSql.Postgres_conexion import PostgresConexion
+from domains.Credenciales.postgres_credencial import PostgresCredencial
+
+class LoggerDB:
+    _sink_removido = False  # ← evita múltiples remove() si se crean varias instancias
+
+    def __init__(self, credencial: PostgresCredencial, nombre_tabla: str, created_by: str = None):
+        
+        # 🔥 Elimina todos los sinks activos, incluso los automáticos
+        logger.remove()
+
+        self.conexion = PostgresConexion(credencial)
+        self.engine = self.conexion.get_engine()
+        self.Session = sessionmaker(bind=self.engine)
+        self.nombre_tabla = nombre_tabla
+        self.created_by = created_by
+
+        self.modelo_logger = self._generar_modelo_logger()
+        self._crear_tabla_si_no_existe()
+        logger.add(self._sink, level="DEBUG")
+
+    def _generar_modelo_logger(self):
+        class LoggerTable(Model_base):
+            __tablename__ = self.nombre_tabla
+            __table_args__ = {'extend_existing': True}  # 👈 Esta línea evita el error
+
+            id = Column(Integer, primary_key=True)
+            nivel = Column(String, nullable=False)
+            mensaje = Column(Text, nullable=False)
+            fecha = Column(TIMESTAMP(timezone=True), nullable=False)
+            modulo = Column(String, nullable=True)
+            funcion = Column(String, nullable=True)
+            linea = Column(Integer, nullable=True)
+        return LoggerTable
+
+    def _crear_tabla_si_no_existe(self):
+        self.modelo_logger.__table__.create(self.engine, checkfirst=True)
+
+    def _sink(self, message):
+        record = message.record
+        try:
+            session = self.Session()
+            log_entry = self.modelo_logger(
+                nivel=record["level"].name,
+                mensaje=record["message"],
+                fecha=record["time"],
+                modulo=record["module"],
+                funcion=record["function"],
+                linea=record["line"],
+                sys_created_by=self.created_by
+            )
+            session.add(log_entry)
+            session.commit()
+            session.close()
+        except SQLAlchemyError as e:
+            print(f"[LoggerDB] Error guardando log en BD: {e}")