176:class SuppressionEntry(Base, TimestampMixin):
177-    __tablename__ = "suppression_list"
178-    id = Column(Integer, primary_key=True)
179-    email = Column(String(320), unique=True, nullable=False, index=True)
180-    reason = Column(String(50), default="unsubscribed")  # unsubscribed|bounced|complaint|manual
181-    source = Column(String(200), default="")
182-    campaign_id = Column(Integer, ForeignKey("campaigns.id", ondelete="SET NULL"))
183-    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"))
184-
185-
186-class SubjectLine(Base, TimestampMixin):
187-    __tablename__ = "subject_lines"
188-    id = Column(Integer, primary_key=True)
383:class ApplicationSettings(Base, TimestampMixin):
384-    __tablename__ = "application_settings"
385-    id = Column(Integer, primary_key=True)
386-    key = Column(String(150), unique=True, nullable=False, index=True)
387-    value = Column(JSON, nullable=False)
388-    description = Column(String(300), default="")
389-    category = Column(String(60), default="general")
357:class EmailEvent(Base, TimestampMixin):
358-    __tablename__ = "email_events"
359-    id = Column(Integer, primary_key=True)
360-    campaign_id = Column(Integer, ForeignKey("campaigns.id", ondelete="CASCADE"), index=True)
361-    campaign_recipient_id = Column(Integer, ForeignKey("campaign_recipients.id", ondelete="CASCADE"), index=True)
362-    gmail_account_id = Column(Integer, ForeignKey("gmail_accounts.id", ondelete="SET NULL"))
363-    event_type = Column(String(40), nullable=False)  # sent|failed|bounced|suppressed|unsubscribed|complained
364-    detail = Column(Text, default="")
365-    message_id = Column(String(200), default="")
366-
367-    __table_args__ = (Index("ix_email_events_campaign", "campaign_id", "event_type"),)
368-
369-
370-class AuditLog(Base, TimestampMixin):
371-    __tablename__ = "audit_logs"
370:class AuditLog(Base, TimestampMixin):
371-    __tablename__ = "audit_logs"
372-    id = Column(Integer, primary_key=True)
373-    user_id = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), index=True)
374-    action = Column(String(120), nullable=False, index=True)
375-    entity = Column(String(60), default="")
376-    entity_id = Column(Integer)
377-    detail = Column(JSON, default=dict)
378-    ip_address = Column(String(64), default="")
379-
380-    user = relationship("User")
381-
382-
383-class ApplicationSettings(Base, TimestampMixin):
384-    __tablename__ = "application_settings"