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/push_subscription.py

@@ -0,0 +1,48 @@
+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 PushSubscription(Base):
+    """Store user's push notification subscriptions"""
+    __tablename__ = "push_subscriptions"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    endpoint = Column(Text, nullable=False)  # Push service endpoint URL
+    p256dh_key = Column(String(255), nullable=False)  # Public key for encryption
+    auth_key = Column(String(255), nullable=False)  # Auth secret for encryption
+    device_info = Column(String(255), nullable=True)  # Browser/device info
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    last_used_at = Column(DateTime(timezone=True), nullable=True)
+
+    user = relationship("User", backref="push_subscriptions")
+
+
+class UserNotificationPreference(Base):
+    """User preferences for different notification types"""
+    __tablename__ = "user_notification_preferences"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, unique=True)
+
+    # Notification type preferences (True = enabled)
+    vehicle_recommended = Column(Boolean, default=True)
+    shipping_update = Column(Boolean, default=True)
+    payment_confirmed = Column(Boolean, default=True)
+    withdrawal_processed = Column(Boolean, default=True)
+    dealer_status = Column(Boolean, default=True)
+    share_purchased = Column(Boolean, default=True)
+    referral_reward = Column(Boolean, default=True)
+    inquiry_reply = Column(Boolean, default=True)
+    system_announcements = Column(Boolean, default=True)
+
+    # Channel preferences
+    push_enabled = Column(Boolean, default=True)
+    email_enabled = Column(Boolean, default=False)
+
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    user = relationship("User", backref="notification_preferences")