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

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

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

@@ -1,7 +1,7 @@
 import logging
 import threading
 import uuid
-from collections.abc import Generator
+from collections.abc import Generator, Mapping
 from typing import Any, Literal, Union, overload
 
 from flask import Flask, current_app
@@ -34,9 +34,9 @@ class CompletionAppGenerator(MessageBasedAppGenerator):
         self,
         app_model: App,
         user: Union[Account, EndUser],
-        args: dict,
+        args: Mapping[str, Any],
         invoke_from: InvokeFrom,
-        stream: Literal[True] = True,
+        streaming: Literal[True],
     ) -> Generator[str, None, None]: ...
 
     @overload
@@ -44,14 +44,29 @@ class CompletionAppGenerator(MessageBasedAppGenerator):
         self,
         app_model: App,
         user: Union[Account, EndUser],
-        args: dict,
+        args: Mapping[str, Any],
         invoke_from: InvokeFrom,
-        stream: Literal[False] = False,
-    ) -> dict: ...
+        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, app_model: App, user: Union[Account, EndUser], args: Any, invoke_from: InvokeFrom, streaming: bool = True
-    ) -> Union[dict, Generator[str, None, None]]:
+        self,
+        app_model: App,
+        user: Union[Account, EndUser],
+        args: Mapping[str, Any],
+        invoke_from: InvokeFrom,
+        streaming: bool = True,
+    ):
         """
         Generate App response.