[FEATURE] Allow voice dictation while AskUserQuestion option picker is shown

Feature Description

When Claude presents multiple-choice options via the AskUserQuestion tool (the interactive option picker in the TUI), voice dictation cannot be used. Pressing space — the push-to-talk / dictation key — does nothing while the option list has focus, so the only way to respond is by keyboard navigation or typing.

Expected Behavior

Dictation should remain available while the option picker is displayed, e.g.:

• Space (or the configured dictation key) starts dictation, with the transcribed text going into the "Other" free-text field, or
• A dedicated keybinding to switch focus to a text input where dictation works as usual.

Current Behavior

While the AskUserQuestion options are on screen, the space key is captured by the picker UI and dictation cannot be triggered. Users who rely on voice input have to switch back to the keyboard for every option prompt.

Why This Matters

• Breaks hands-free / voice-driven workflows mid-conversation
• Accessibility: users who depend on dictation are blocked at every option prompt

Environment

• Platform: macOS (Darwin 25.2.0)
• Claude Code CLI