fix(app_generator_service): overload type hints (#11507)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/app/apps/agent_chat/app_generator.py

@@ -2,7 +2,7 @@ import logging
 import threading
 import uuid
 from collections.abc import Generator, Mapping
-from typing import Any, Union
+from typing import Any, Literal, Union, overload
 
 from flask import Flask, current_app
 from pydantic import ValidationError
@@ -28,6 +28,39 @@ logger = logging.getLogger(__name__)
 
 
 class AgentChatAppGenerator(MessageBasedAppGenerator):
+    @overload
+    def generate(
+        self,
+        *,
+        app_model: App,
+        user: Union[Account, EndUser],
+        args: Mapping[str, Any],
+        invoke_from: InvokeFrom,
+        streaming: Literal[True],
+    ) -> Generator[str, None, None]: ...
+
+    @overload
+    def generate(
+        self,
+        *,
+        app_model: App,
+        user: Union[Account, EndUser],
+        args: Mapping[str, Any],
+        invoke_from: InvokeFrom,
+        streaming: Literal[False],
+    ) -> Mapping[str, Any]: ...
+
+    @overload
+    def generate(
+        self,
+        *,
+        app_model: App,
+        user: Union[Account, EndUser],
+        args: Mapping[str, Any],
+        invoke_from: InvokeFrom,
+        streaming: bool,
+    ) -> Mapping[str, Any] | Generator[str, None, None]: ...
+
     def generate(
         self,
         *,
@@ -36,7 +69,7 @@ class AgentChatAppGenerator(MessageBasedAppGenerator):
         args: Mapping[str, Any],
         invoke_from: InvokeFrom,
         streaming: bool = True,
-    ) -> Mapping[str, Any] | Generator[str, None, None]:
+    ):
         """
         Generate App response.