Initial commit: TradeMate 外贸小助手 MVP

项目结构:
- backend/     Python FastAPI 后端
- uni-app/     uni-app跨端前端
- docs/        设计文档
- docker-compose.yml  Docker编排
- nginx/scripts/systemd 运维配置

已完成功能:
- 用户认证 (JWT)
- 智能翻译 + 回复建议
- 营销素材生成
- 客户管理 + 沉默检测
- 报价单管理
- 产品库管理
- 汇率换算
- 推送通知 (uni-push)
- WhatsApp Webhook框架
- Celery定时任务

backend/app/models/customer.py

@@ -0,0 +1,72 @@
+from sqlalchemy import Column, String, Boolean, Integer, DateTime, Text, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+from sqlalchemy.orm import relationship
+from datetime import datetime
+from app.database import Base
+import uuid
+
+
+class Customer(Base):
+    __tablename__ = "customers"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(UUID(as_uuid=True), nullable=False, index=True)
+    name = Column(String(255), nullable=False)
+    company = Column(String(255))
+    country = Column(String(100))
+    phone = Column(String(50))
+    email = Column(String(255))
+    whatsapp_id = Column(String(255))
+    source = Column(String(100))
+    tags = Column(JSONB, default=[])
+    notes = Column(Text)
+    preference = Column(JSONB, default={})
+    status = Column(String(50), default="lead")
+    last_contact_at = Column(DateTime)
+    silence_started_at = Column(DateTime)
+    next_followup_at = Column(DateTime)
+    estimated_value = Column(String(50))
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    user = relationship("User", back_populates="customers")
+    conversations = relationship("Conversation", back_populates="customer", cascade="all, delete-orphan")
+    quotations = relationship("Quotation", back_populates="customer")
+
+
+class Conversation(Base):
+    __tablename__ = "conversations"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(UUID(as_uuid=True), nullable=False, index=True)
+    customer_id = Column(UUID(as_uuid=True), ForeignKey("customers.id"), nullable=False, index=True)
+    channel = Column(String(50), default="whatsapp")
+    topic = Column(String(255))
+    status = Column(String(50), default="active")
+    message_count = Column(Integer, default=0)
+    last_message_at = Column(DateTime)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    user = relationship("User", back_populates="conversations")
+    customer = relationship("Customer", back_populates="conversations")
+    messages = relationship("Message", back_populates="conversation", cascade="all, delete-orphan", order_by="Message.created_at")
+
+
+class Message(Base):
+    __tablename__ = "messages"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    conversation_id = Column(UUID(as_uuid=True), ForeignKey("conversations.id"), nullable=False, index=True)
+    direction = Column(String(20), nullable=False)
+    content = Column(Text, nullable=False)
+    content_translated = Column(Text)
+    content_type = Column(String(50), default="text")
+    ai_suggestions = Column(JSONB)
+    selected_suggestion = Column(Integer)
+    user_edited = Column(Text)
+    status = Column(String(50), default="sent")
+    metadata = Column(JSONB, default={})
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    conversation = relationship("Conversation", back_populates="messages")