feat: ship persistent ai playground and alerts foundation

backend/app/models/__init__.py

@@ -9,6 +9,8 @@ from app.models.bgp_anomaly import BGPAnomaly
 from app.models.bgp_incident import BGPIncident
 from app.models.bgp_observation import BGPObservation
 from app.models.system_setting import SystemSetting
+from app.models.playground_session import PlaygroundSession
+from app.models.playground_message import PlaygroundMessage
 
 __all__ = [
     "User",

backend/app/models/playground_message.py

@@ -0,0 +1,40 @@
+from sqlalchemy import JSON, Boolean, Column, DateTime, ForeignKey, Integer, String, Text
+from sqlalchemy.sql import func
+
+from app.db.session import Base
+
+
+class PlaygroundMessage(Base):
+    __tablename__ = "playground_messages"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    public_id = Column(String(64), unique=True, index=True, nullable=False)
+    session_id = Column(Integer, ForeignKey("playground_sessions.id", ondelete="CASCADE"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
+    parent_message_id = Column(Integer, ForeignKey("playground_messages.id", ondelete="SET NULL"), nullable=True)
+    role = Column(String(20), nullable=False)
+    kind = Column(String(20), nullable=False, default="message")
+    status = Column(String(20), nullable=False, default="done")
+    title = Column(String(255), nullable=True)
+    content = Column(Text, nullable=False, default="")
+    thinking_content = Column(Text, nullable=False, default="")
+    meta = Column(JSON, nullable=False, default=list)
+    provider = Column(String(100), nullable=True)
+    model = Column(String(200), nullable=True)
+    request_id = Column(String(100), nullable=True)
+    raw_response = Column(JSON, nullable=False, default=dict)
+    content_blocks = Column(JSON, nullable=False, default=list)
+    text_blocks = Column(JSON, nullable=False, default=list)
+    thinking_blocks = Column(JSON, nullable=False, default=list)
+    sort_order = Column(Integer, nullable=False, default=0, index=True)
+    is_visible = Column(Boolean, nullable=False, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
+    updated_at = Column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False,
+    )
+
+    def __repr__(self):
+        return f"<PlaygroundMessage public_id={self.public_id} role={self.role} status={self.status}>"

backend/app/models/playground_session.py

@@ -0,0 +1,27 @@
+from sqlalchemy import JSON, Column, DateTime, ForeignKey, Integer, String, UniqueConstraint
+from sqlalchemy.sql import func
+
+from app.db.session import Base
+
+
+class PlaygroundSession(Base):
+    __tablename__ = "playground_sessions"
+    __table_args__ = (
+        UniqueConstraint("user_id", "session_key", name="uq_playground_sessions_user_session_key"),
+    )
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
+    session_key = Column(String(100), nullable=False, default="default")
+    title = Column(String(200), nullable=False, default="Playground 会话")
+    state = Column(JSON, nullable=False, default={})
+    created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
+    updated_at = Column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False,
+    )
+
+    def __repr__(self):
+        return f"<PlaygroundSession user_id={self.user_id} session_key={self.session_key}>"