Grep tool returns only error messages if directory has invalid symlinks, despite valid outputs

### Description

<img width="1536" height="688" alt="Image" src="https://github.com/user-attachments/assets/f25c985a-040a-43d4-844b-bb38590eab6d" />

### Plugins

_No response_

### OpenCode version

v1.1.21

### Steps to reproduce

_No response_

### Screenshot and/or share link

_No response_

### Operating System

macOS 26.0.1

### Terminal

zsh