[FEATURE] Dispatch should support AskUserQuestion button UI for better mobile UX

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

When using Claude Code's Dispatch (mobile Slack integration), AskUserQuestion displays selection options as plain text but does NOT render interactive buttons. Users must manually type the selection number or option text instead of clicking a button.

Current behavior:

• Desktop Claude (claude.ai): AskUserQuestion buttons are fully interactive ✅
• Dispatch (mobile Slack): Text options only, no clickable buttons ❌

This makes the mobile experience inconsistent and requires users to type instead of tap.

Proposed Solution

Dispatch should render AskUserQuestion choices as tappable buttons, just like desktop Claude does. This would:

• Improve mobile UX consistency across all Claude interfaces
• Reduce typing friction on mobile devices
• Make skills with interactive prompts work naturally on mobile

Alternative Solutions

Current workarounds that users must use:

• Type selection number: ①, ②, ③
• Or describe the choice in text: "7/19と同じパターンで踏襲"

These work but are not ideal for mobile users who expect tap-to-select buttons.

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

When running the /Diary skill from mobile Slack, users see:

7/21分はどう記録しますか？
①7/19と同じパターンをそのまま踏襲
②表記を正しく修正して記録
③その他

But there are no clickable buttons—users must type ① or write out their choice, when clicking a button would be simpler and more natural on mobile.

Additional Context

• Dispatch is Claude Code's mobile Slack integration
• Skills using AskUserQuestion (like /Diary) are affected
• Desktop version works perfectly; this is a Dispatch-only limitation
• Environment: Android/iOS Slack apps