Windows paths with %xx are incorrectly decoded

Description

On Windows, opencode cannot run prompts when the workspace path contains a literal sequence that looks URL-encoded, such as %2e or %20.
For example:
C:\Users\example\Documents\Profiles\User%2e%20Name\projects\ExampleProject
The directory really is named User%2e%20Name. It is not a URL-encoded representation of User. Name.
Opencode opens normally and displays the prompt box, but submitting any prompt immediately fails.

Plugins

N/A

OpenCode version

1.18.11

Steps to reproduce

1. On Windows, create or use a directory containing literal percent-encoded-looking characters:
   C:\Users\example\Documents\Profiles\User%2e%20Name\projects\ExampleProject
2. Open this directory in opencode.
3. Create a session.
4. Submit any prompt.

Screenshot and/or share link

Operating System

Windows 11

Terminal

Windows Terminal, Powershell