Initial commit: AutonetSellCar platform with deployment system

- Frontend: Next.js 14 with TypeScript
- Backend: FastAPI with SQLAlchemy
- Agent: Carmodoo sync agent
- Deployment: Docker Compose based staging/production setup
- Scripts: Automated deployment with rollback support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/models/notification.py

@@ -0,0 +1,37 @@
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Text
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from ..database import Base
+
+
+class Notification(Base):
+    """User notifications"""
+    __tablename__ = "notifications"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+
+    # Notification type: vehicle_recommended, shipping_update, withdrawal_processed,
+    # referral_reward, dealer_approved, share_purchased, system
+    notification_type = Column(String(50), nullable=False)
+
+    # Title and message (supports i18n keys or direct text)
+    title = Column(String(200), nullable=False)
+    message = Column(Text, nullable=False)
+
+    # Optional link to navigate when clicked
+    link = Column(String(500), nullable=True)
+
+    # Related entity (optional)
+    related_id = Column(Integer, nullable=True)  # ID of related entity
+    related_type = Column(String(50), nullable=True)  # Type: vehicle_request, purchased_vehicle, withdrawal, etc.
+
+    # Status
+    is_read = Column(Boolean, default=False)
+    read_at = Column(DateTime(timezone=True), nullable=True)
+
+    # Timestamps
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    # Relationships
+    user = relationship("User", backref="notifications")