MCP elicitation controls visible but not interactable in terminal (tmux/WSL)

Bug

MCP elicitation dialogs render in the terminal but the accept/decline controls cannot be interacted with. Every elicitation is immediately "dismissed without a decision" by the server, making all MCP write operations unusable.

Environment

• Claude Code: v2.1.193
• Platform: WSL2 (Ubuntu, kernel 6.6.87.2-microsoft-standard-WSL2)
• Terminal: tmux 3.4, TERM=xterm-256color
• Shell: bash

Reproduction

1. Connect to any MCP server that uses elicitation/create for write confirmation
2. Trigger a write operation that sends an elicitation (e.g. a tool with dryRun: false that requires user confirmation)
3. The elicitation prompt appears -- controls are visible on screen
4. Controls cannot be clicked or selected -- no interaction is possible
5. The elicitation times out or is dismissed, server receives "dismissed without a decision"

Tested 4 consecutive times with the same result. Scrolling position does not matter -- controls are unclickable even when visible at the bottom of the terminal.

Expected

The accept/decline controls in the elicitation dialog should be interactable (clickable/selectable) so the user can approve or reject the operation.

Observed

Controls render but are non-functional. The dialog auto-dismisses. The MCP server correctly receives the elicitation cancellation and reports "dismissed without a decision."

Notes

• The MCP server is confirmed working correctly (elicitation body is short, ~6 rows, well within display bounds)
• Prior Claude Code versions (pre-2.1.193) had intermittent success with the same server and same elicitation flow
• This may be related to the new Claude Code terminal UI changes
• The MCP server's test environment (which bypasses elicitation via audit mode) works fine -- the issue is strictly in the interactive elicitation UI
• Related but different from #56243 (Cowork auto-cancel) -- this is the CLI terminal surface