Initial commit: Fleet Management app with security hardening and background launcher

- Flask app with SQLAlchemy, Flask-Login, Flask-Mail
- Admin/owner roles, vessel management, charters, work orders
- Background launcher (Iniciar.vbs) runs server without terminal window
- Root redirect fixed: / → /login
- debug=False, use_reloader=False for pythonw.exe compatibility

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/models_additions.py

@@ -0,0 +1,29 @@
+
+class VesselSystem(db.Model):
+    __tablename__ = 'vessel_systems'
+    id = db.Column(db.Integer, primary_key=True)
+    vessel_id = db.Column(db.Integer, db.ForeignKey('vessels.id'))
+    system_type = db.Column(db.String(50), nullable=False)  # propulsion, cubierta, puente, gobierno, generacion, electrico, etc
+    component_name = db.Column(db.String(100), nullable=False)
+    manufacturer = db.Column(db.String(100))
+    model = db.Column(db.String(100))
+    serial_number = db.Column(db.String(100))
+    installation_date = db.Column(db.Date)
+    last_maintenance_date = db.Column(db.Date)
+    status = db.Column(db.String(20), default='active')
+    notes = db.Column(db.Text)
+    vessel = db.relationship('Vessel', backref='systems')
+
+class MaintenanceLog(db.Model):
+    __tablename__ = 'maintenance_logs'
+    id = db.Column(db.Integer, primary_key=True)
+    system_id = db.Column(db.Integer, db.ForeignKey('vessel_systems.id'))
+    work_order_id = db.Column(db.Integer, db.ForeignKey('work_orders.id'))
+    maintenance_date = db.Column(db.Date, nullable=False)
+    maintenance_type = db.Column(db.String(50), nullable=False)  # preventivo, correctivo, inspeccion
+    description = db.Column(db.Text)
+    cost = db.Column(db.Float)
+    technician = db.Column(db.String(100))
+    next_maintenance_date = db.Column(db.Date)
+    hours_accumulated = db.Column(db.Integer)
+    system = db.relationship('VesselSystem', backref='maintenance_logs')