fix(annotated): drop unnecessary string annotations, add changelog

Address review feedback on PR #1692:
- Remove forward-reference quotes from _WithAnnotatedDecorator.__call__
  since Callable, _CommandParams, and _CommandReturn are already in scope
- Add a Bug Fixes changelog entry for the with_annotated type-hint fix

Author: KelvinChung2000

CHANGELOG.md

@@ -5,6 +5,9 @@
         - **complete_in_thread**: (boolean) if `True`, then completion will run in a separate
           thread. If `False` then completion runs in the main thread and causes it to block if slow.
           Defaults to `True`.
+- Bug Fixes
+    - Fixed type hinting so that methods decorated with `with_annotated` no longer trigger spurious
+      mypy errors and preserve their original signature.
 
 ## 4.0.0 (June 5, 2026)
 

cmd2/annotated.py

@@ -2145,7 +2145,7 @@ def handler(self_arg: Any, ns: Any) -> Any:
 class _WithAnnotatedDecorator(Protocol):
     """The signature-preserving decorator ``with_annotated(...)`` returns (generic per call)."""
 
-    def __call__(self, fn: "Callable[_CommandParams, _CommandReturn]", /) -> "Callable[_CommandParams, _CommandReturn]": ...
+    def __call__(self, fn: Callable[_CommandParams, _CommandReturn], /) -> Callable[_CommandParams, _CommandReturn]: ...
 
 
 @overload