## Summary
- skip managed-agent runtime discovery when the members sidebar has no
local managed bots
- run runtime listing disk, process, and mutex work on Tauri’s blocking
pool
- preserve local managed-bot status and Start/Stop behavior with
positive and negative E2E coverage
Opening Add people in a human-only channel could invoke synchronous
native runtime discovery before the sidebar painted, leaving the macOS
app beachballed. Human invites do not depend on that data.
## Why
I have seen slowness opening this dialog in the UI
https://github.com/user-attachments/assets/1955eb5e-ee47-4edf-8e5c-606d11ffbc25
### Related issue
Related overlap: #4851 is a broader managed-agent lifecycle change that
includes a similar native offload. This draft is intentionally limited
to the sidebar critical path and adds the human-only query gate.
### Testing
I have verified the pause in the video goes away after this change.
- `just ci`
- `just desktop-check`
- `just desktop-test` (5,241 passed)
- `just desktop-tauri-fmt-check`
- `just desktop-tauri-clippy`
- `just desktop-tauri-test` (2,702 passed; 18 ignored)
- focused Playwright: human-only sidebar skips runtime discovery
- focused Playwright: local managed bot retains status and Stop/Start
controls
No visual styling changed, so screenshots are not applicable.
Signed-off-by: Matt Toohey <contact@matttoohey.com>
17af15effa