Bug: "spawn [object promise] ENOENT" when opening external programs (VSCode, PowerShell)

Description:
In the opencode desktop app, actions to open external programs (VSCode, PowerShell) fail with:

error invoking remote method 'open-path': error: spawn [object promise] ENOENT

Environment:

• OS: Windows 10/11 (win32)
• OpenCode version: 1.14.x (desktop app at @opencode-aidesktop)
• Install method: Electron desktop

Steps to reproduce:

1. Open opencode desktop
2. Try to open VSCode or PowerShell from the interface
3. Error dialog appears with the above message

Verification:

• Both code and powershell are in PATH and work from terminal directly
• code is at: E:\Microsoft VS Code\bin\code.cmd
• CLI logs (~/.local/share/opencode/log/) do not contain this error
• The error comes from the Electron renderer/main process

Likely cause:
spawn [object promise] ENOENT suggests a Promise object is being passed as the executable path to child_process.spawn() instead of a resolved string path.