fix typing errors

src/chap/commands/ask.py

@@ -114,7 +114,7 @@ def main(obj: Obj, prompt: list[str], use_stdin: bool, print_prompt: bool) -> No
     assert api is not None
 
     if use_stdin:
-        if prompt == use_stdin:
+        if prompt:
             raise click.UsageError("Can't use 'prompt' together with --stdin")
 
         joined_prompt = sys.stdin.read()

src/chap/core.py

@@ -5,6 +5,7 @@
 
 import asyncio
 import datetime
+import io
 import importlib
 import os
 import pathlib
@@ -186,7 +187,7 @@ def set_system_message(ctx: click.Context, param: click.Parameter, value: str) -
 
 
 def set_system_message_from_file(
-    ctx: click.Context, param: click.Parameter, value: click.File
+    ctx: click.Context, param: click.Parameter, value: io.TextIOWrapper
 ) -> None:
     if value is None:
         return