AskUserQuestion tool available to tmux teammates but renders in teammate pane with no leader notification

Description

Tmux-mode teammates are full CLI processes, so they bypass the subagent tool filter that strips AskUserQuestion from in-process teammates. This means AskUserQuestion is available and callable by tmux teammates, but it renders the question UI in the teammate's own tmux pane rather than forwarding to the team lead.

No message or notification is sent to the team lead. If nobody is watching the teammate's pane, the teammate blocks indefinitely waiting for input that will never come.

Steps to Reproduce

1. Start Claude Code with --teammate-mode tmux
2. Spawn a teammate via the Task tool
3. Give the teammate a task that causes it to invoke AskUserQuestion
4. Observe that the question UI renders in the teammate's tmux pane, not the leader's terminal
5. The leader receives no notification that the teammate is waiting for user input

Expected Behavior

Either:

• AskUserQuestion should be filtered out of the tool set for tmux teammates (consistent with how in-process teammates handle it), OR
• The tool should detect that it's running inside a teammate process and forward the question to the team lead via SendMessage (similar to how ExitPlanMode sends a plan_approval_request to the leader when called by a teammate with plan_mode_required)

Context

• In-process teammates correctly have AskUserQuestion stripped from their tool set by the subagent tool filter
• Tmux teammates skip the subagent tool filter entirely because they go through the main session's tool resolution path, which only applies the filter when an agent definition is present
• The AskUserQuestion tool has requiresUserInteraction: true and renders an interactive multi-choice UI, which is not practical in an unmonitored tmux pane

Version

CLI v2.1.37