feat: 集成飞书通知和机器人对话系统

- 新增通知系统 (notifications 表、服务、API)
- 新增飞书定时任务结果推送 (webhook + 应用消息)
- 新增飞书应用消息发送服务 (feishu_app_service)
- 新增飞书 WebSocket 长连接事件监听 (苹果应用)
- 新增飞书账号绑定/解绑 API
- 新增橙子飞书机器人 (独立 WS 连接，固定路由到橙子助手 Agent)
- 执行记录添加 schedule_id，用户添加飞书绑定字段

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/models/__init__.py

@@ -17,5 +17,6 @@ from app.models.agent_vector_memory import AgentVectorMemory
 from app.models.agent_learning_pattern import AgentLearningPattern
 from app.models.agent_schedule import AgentSchedule
 from app.models.knowledge_base import KnowledgeBase, Document, DocumentChunk
+from app.models.notification import Notification
 
-__all__ = ["User", "Workflow", "WorkflowVersion", "Agent", "Execution", "ExecutionLog", "ModelConfig", "DataSource", "WorkflowTemplate", "TemplateRating", "TemplateFavorite", "NodeTemplate", "Role", "Permission", "WorkflowPermission", "AgentPermission", "AlertRule", "AlertLog", "PersistentUserMemory", "AgentLLMLog", "AgentVectorMemory", "AgentLearningPattern", "AgentSchedule", "KnowledgeBase", "Document", "DocumentChunk"]
+__all__ = ["User", "Workflow", "WorkflowVersion", "Agent", "Execution", "ExecutionLog", "ModelConfig", "DataSource", "WorkflowTemplate", "TemplateRating", "TemplateFavorite", "NodeTemplate", "Role", "Permission", "WorkflowPermission", "AgentPermission", "AlertRule", "AlertLog", "PersistentUserMemory", "AgentLLMLog", "AgentVectorMemory", "AgentLearningPattern", "AgentSchedule", "KnowledgeBase", "Document", "DocumentChunk", "Notification"]

backend/app/models/agent_schedule.py

@@ -16,6 +16,7 @@ class AgentSchedule(Base):
     cron_expression = Column(String(100), nullable=False, comment="cron 表达式，如 0 9 * * *")
     input_message = Column(Text, nullable=False, comment="定时执行时发送的消息内容")
     timezone = Column(String(64), default="Asia/Shanghai", comment="时区")
+    webhook_url = Column(String(512), nullable=True, comment="飞书机器人 Webhook URL（可选），执行完成后推送通知")
     enabled = Column(Boolean, default=True, comment="是否启用")
     last_run_at = Column(DateTime, nullable=True, comment="上次执行时间")
     last_run_status = Column(String(32), nullable=True, comment="上次执行状态: success/failed")

backend/app/models/execution.py

@@ -25,6 +25,9 @@ class Execution(Base):
     error_message = Column(Text, comment="错误信息")
     execution_time = Column(Integer, comment="执行时间(ms)")
     task_id = Column(String(100), comment="Celery任务ID")
+    schedule_id = Column(
+        CHAR(36), ForeignKey("agent_schedules.id"), nullable=True, comment="定时任务ID"
+    )
     parent_execution_id = Column(
         CHAR(36), ForeignKey("executions.id"), nullable=True, comment="父执行ID"
     )

backend/app/models/notification.py

@@ -0,0 +1,24 @@
+"""通知模型 — 用于定时任务结果推送及系统通知"""
+import uuid
+from datetime import datetime
+from sqlalchemy import Column, String, Text, DateTime, ForeignKey, Boolean
+from sqlalchemy.dialects.mysql import CHAR
+from app.core.database import Base
+
+
+class Notification(Base):
+    """系统通知 — 定时任务结果、告警、系统消息等"""
+    __tablename__ = "notifications"
+
+    id = Column(CHAR(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    user_id = Column(CHAR(36), ForeignKey("users.id"), nullable=False, index=True, comment="接收用户 ID")
+    title = Column(String(200), nullable=False, comment="通知标题")
+    content = Column(Text, nullable=True, comment="通知正文")
+    category = Column(String(32), default="system", comment="分类: schedule/alert/system")
+    ref_type = Column(String(32), nullable=True, comment="关联对象类型: schedule/execution")
+    ref_id = Column(String(36), nullable=True, comment="关联对象 ID")
+    is_read = Column(Boolean, default=False, comment="是否已读")
+    created_at = Column(DateTime, default=datetime.utcnow, comment="创建时间")
+
+    def __repr__(self):
+        return f"<Notification(id={self.id}, user_id={self.user_id}, title={self.title})>"

backend/app/models/user.py

@@ -17,6 +17,8 @@ class User(Base):
     email = Column(String(100), unique=True, nullable=False, comment="邮箱")
     password_hash = Column(String(255), nullable=False, comment="密码哈希")
     role = Column(String(20), default="user", comment="角色: admin/user（保留字段，用于向后兼容）")
+    feishu_open_id = Column(String(64), nullable=True, comment="飞书用户 open_id，用于推送通知")
+    feishu_default_agent_id = Column(CHAR(36), nullable=True, comment="飞书对话默认 Agent ID")
     created_at = Column(DateTime, default=func.now(), comment="创建时间")
     updated_at = Column(DateTime, default=func.now(), onupdate=func.now(), comment="更新时间")