[BUG] computer-use request_access times out at 180s with no permission dialog

Bug Description

In Cowork mode, request_access for native macOS apps times out at the 180s deadline. No permission dialog is ever shown to the user, and list_granted_applications returns an empty-but-connected response. Behavior reproduces across Cowork app relaunches.

Environment

• Cowork app version: 1.7196.0
• claude-code helper: 2.1.138
• macOS: 26.4.1 (build 25E253)
• Spotlight indexing: enabled (mdutil -s / returns "Indexing enabled.")

Different root cause from #38225, which was traced to Spotlight indexing being disabled — Spotlight indexing is on in this environment.

Reproduction

request_access(["Screen Sharing", "iPhone Mirroring", "Apple Configurator"])

Result on both 2026-05-07 and 2026-05-12 retest (Cowork app relaunched/updated between attempts):

• 180s timeout (MCP deadline)
• No permission dialog shown
• No app entry appears in list_granted_applications

Each call hangs to deadline rather than returning an error path.

What I tried

• App relaunch between attempts: no change.
• list_granted_applications (before and after request_access attempts): empty connected response in both cases.

Asks

1. What signal is the helper waiting on inside that 180s window?
2. Is there a TCC / accessibility prerequisite that fails silently before the dialog is presented?
3. Is there a known interaction with macOS 26.4.1 (build 25E253)?

Happy to capture logs or run a diagnostic if you can tell me where to grab them.