feat: fecha y horario en aula, fix division by zero, soporte enlace virtual y mejora contrastes comisiones

app/models/reservation.py

@@ -47,6 +47,7 @@ class Reservation(db.Model):
     status = db.Column(StatusType, default='PENDING', nullable=False)  # Maps to VARCHAR(20) with StatusString
     expected_attendees = db.Column(db.Integer, nullable=False)
     shift = db.Column(db.String(30), nullable=True)  # Mañana, Tarde, Vespertino, Noche
+    virtual_link = db.Column(db.String(500), nullable=True)  # Zoom, Meet, Teams, etc.
     notes = db.Column(db.Text)
     
     created_at = db.Column(db.DateTime, default=datetime.utcnow)
@@ -81,6 +82,24 @@ class Reservation(db.Model):
         if self.classroom:
             return self.classroom.code
         return ''
+
+    @property
+    def effective_virtual_link(self):
+        """Devuelve el enlace explícito de la reserva o hereda el de la comisión"""
+        if self.virtual_link and self.virtual_link.strip():
+            return self.virtual_link.strip()
+        if self.commission and self.commission.virtual_link:
+            return self.commission.virtual_link.strip()
+        return None
+
+    @property
+    def is_virtual(self):
+        """Verifica si la reserva es virtual por aula o por contar con enlace virtual"""
+        if self.classroom and self.classroom.is_virtual:
+            return True
+        if self.effective_virtual_link:
+            return True
+        return False
     
 # Relationships
     classroom = db.relationship('Classroom', backref=db.backref('reservation_list', lazy=True, cascade='all, delete-orphan'))
@@ -100,6 +119,8 @@ class Reservation(db.Model):
             'status': self.status,  # Already a string in DB
             'expected_attendees': self.expected_attendees,
             'notes': self.notes,
+            'virtual_link': self.effective_virtual_link,
+            'is_virtual': self.is_virtual,
             'created_at': self.created_at.isoformat() if self.created_at else None,
             'updated_at': self.updated_at.isoformat() if self.updated_at else None,
             'classroom': self.classroom.to_dict() if self.classroom else None,