When function with `Optional` param is moved, `Optional` is not imported in target file

[debonte]

Environment data

• Language Server version: 2024.2.105
• OS and version: Windows 11
• Python version (& distribution if applicable, e.g. Anaconda): 3.12.1

Code Snippet

# test.py
from typing import Optional

class Dependency:
    pass

def func(self, param1: Optional[Dependency]):
    pass

Repro Steps

1. Use the "Move symbol to..." code action to move func to another file.

Expected behavior

from typing import Optional
from test import Dependency

def func(self, param1: Optional[Dependency]):
    pass

Actual behavior

from test import Dependency

def func(self, param1: Optional[Dependency]):
    pass

[heejaechang]

my guess is a bug in pep604 handling in import adder is causing it to skip adding Optional thinking Dependency | None will be used instead of Optional