Issue Description
在qoder中无法spawn多个subagent 执行任务。
返回信息：
Subagent dispatch is disabled in this environment. Falling back to inline execution — I’ll work through the tasks directly in this session.
Steps to Reproduce
使用superpower brainstorming 开始一个项目，在实现阶段选择这用subagent执行。
Expected Behavior
使用subagent并行开始
Actual Behavior
fallback to inline execution
Screenshots / Screen Recordings
Operating System
Current Qoder Version (Menu → About Qoder → Copy)
Version: 1.6.0
VSCode Version: 1.106.3
Commit: 3f7157c533d627d014a978833b18999395c3afc9
Date: 2026-06-03T13:50:11.575Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.5.0