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/inquiry.py

@@ -0,0 +1,79 @@
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+import enum
+
+from ..database import Base
+
+
+class InquiryStatus:
+    PENDING = "pending"
+    IN_PROGRESS = "in_progress"
+    RESOLVED = "resolved"
+    CLOSED = "closed"
+
+
+class InquiryCategory:
+    GENERAL = "general"
+    VEHICLE = "vehicle"
+    PAYMENT = "payment"
+    SHIPPING = "shipping"
+    DEALER = "dealer"
+    ACCOUNT = "account"
+    OTHER = "other"
+
+
+class Inquiry(Base):
+    """User inquiry/support ticket"""
+    __tablename__ = "inquiries"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+
+    # Legacy field for backward compatibility
+    car_id = Column(Integer, ForeignKey("cars.id"), nullable=True)
+
+    # Inquiry details
+    category = Column(String(50), default=InquiryCategory.GENERAL)
+    subject = Column(String(200), nullable=True)
+    message = Column(Text, nullable=False)
+
+    # Contact info (can be different from user's profile)
+    contact_email = Column(String(255), nullable=True)
+    contact_phone = Column(String(50), nullable=True)
+
+    # Status
+    status = Column(String(20), default=InquiryStatus.PENDING)
+
+    # Admin response
+    admin_response = Column(Text, nullable=True)
+    responded_at = Column(DateTime(timezone=True), nullable=True)
+    responded_by = Column(Integer, ForeignKey("users.id"), nullable=True)
+
+    # Timestamps
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    # Relationships
+    user = relationship("User", foreign_keys=[user_id], back_populates="inquiries")
+    responder = relationship("User", foreign_keys=[responded_by])
+    # car relationship disabled due to schema mismatch - Car model doesn't have inquiries relationship
+    # car = relationship("Car", back_populates="inquiries")
+
+
+class InquiryMessage(Base):
+    """Messages within an inquiry thread"""
+    __tablename__ = "inquiry_messages"
+
+    id = Column(Integer, primary_key=True, index=True)
+    inquiry_id = Column(Integer, ForeignKey("inquiries.id"), nullable=False)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+
+    message = Column(Text, nullable=False)
+    is_admin = Column(Boolean, default=False)
+
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    # Relationships
+    inquiry = relationship("Inquiry", backref="messages")
+    user = relationship("User")