feat(app):

1. Add new functional features to the agent;
2. Enhance the voice output;
3. Modify the end_user binding;
4. Delete and modify the tools.

api/app/models/end_user_model.py

@@ -12,7 +12,8 @@ class EndUser(Base):
     __tablename__ = "end_users"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, nullable=False, index=True)
-    app_id = Column(UUID(as_uuid=True), ForeignKey("apps.id"), nullable=False)
+    app_id = Column(UUID(as_uuid=True), ForeignKey("apps.id"), nullable=True)
+    workspace_id = Column(UUID(as_uuid=True), ForeignKey("workspaces.id"), nullable=False)
     # end_user_id = Column(String, nullable=False, index=True)
     other_id = Column(String, nullable=True)  # Store original user_id
     other_name = Column(String, default="", nullable=False)
@@ -61,4 +62,7 @@ class EndUser(Base):
     app = relationship(
         "App",
         back_populates="end_users"
-    )
+    )
+
+    # 与 WorkSpace 的反向关系
+    workspace = relationship("Workspace", back_populates="end_users")