Regression on Windows in v0.4.79: `absolute_path:line:column` no longer opens file location (worked in v0.4.73)

What version of the IDE extension are you using?

v0.4.79

What subscription do you have?

Enterprise

Which IDE are you using?

VSCode

What platform is your computer?

• OS: Windows 11 (PowerShell)
• Codex CLI: v0.4.79 (broken), v0.4.73 (works)
• Path includes Japanese characters

What issue are you seeing?

Title:
Regression on Windows in v0.4.79: absolute_path:line:column no longer opens file location (worked in v0.4.73)

Body:

Summary

On Windows, Codex CLI v0.4.79 seems to break handling of file-location strings in this format:

absolute_path:line:column

This worked in v0.4.73.

Environment

• OS: Windows (PowerShell)
• Codex CLI: v0.4.79 (broken), v0.4.73 (works)
• Path includes Japanese characters

Repro

1. Use v0.4.79
2. Output or paste this location string:

D:\PROJECT\日本語パス\__01__\20260218\日本語プログラム名\__ユーザーテスト__\app.py:42:5

1. Try to open/jump via the UI behavior that previously resolved this format.

Expected

The file opens directly and cursor jumps to line 42, column 5.

Actual

The string is treated as plain text / not resolved as a file location (jump does not work).

Regression

• v0.4.73: works
• v0.4.79: broken

Notes

This may be related to Windows path parsing and/or non-ASCII path handling.