feat: production branch with deploy config for baota panel

- Add deploy/ directory with production env, supervisor, nginx, migration configs
- Include all latest features: admin management, feedback, footer with ICP/beian
- Database: foreign_trade (PostgreSQL), user: foreign_trade
- Frontend: trade.yuzhiran.com, backend proxy via Nginx

backend/app/models/__init__.py

@@ -10,6 +10,7 @@ from .subscription import Subscription
 from .preference import PreferenceAnalysis, MarketingEffect
 from .device import Device
 from .followup import FollowupStrategy, FollowupLog
+from .system_config import SystemConfig
 
 __all__ = [
     "User", "Product",
@@ -24,4 +25,5 @@ __all__ = [
     "PreferenceAnalysis", "MarketingEffect",
     "Device",
     "FollowupStrategy", "FollowupLog",
+    "SystemConfig",
 ]

backend/app/models/system_config.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, String, DateTime, Text
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+from datetime import datetime
+from app.database import Base
+import uuid
+
+
+class SystemConfig(Base):
+    __tablename__ = "system_configs"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    key = Column(String(100), unique=True, nullable=False, index=True)
+    value = Column(JSONB, nullable=False, default={})
+    description = Column(Text, default="")
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

backend/app/models/user.py

@@ -17,6 +17,9 @@ class User(Base):
     tier = Column(String(50), default="free")
     role = Column(String(20), default="user")
     is_active = Column(Boolean, default=True)
+    email = Column(String(255))
+    last_login_at = Column(DateTime, nullable=True)
+    login_count = Column(Integer, default=0)
     created_at = Column(DateTime, default=datetime.utcnow)
     updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
     settings = Column(JSONB, default={