feat: implement question tool modal (fixes #273)

[TechWizard9999]

Summary

Fixes #273 - Question tool modal does not appear (blocks workflow)

Changes

Types (types.ts)

• Added QuestionRequest import from SDK
• Added PendingQuestion type with receivedAt timestamp

State Management (context/session.ts)

• Added pendingQuestions to store state
• Added event handlers for question.asked, question.replied, question.rejected
• Added refreshPendingQuestions() to fetch pending questions
• Added activeQuestion computed (per-session or global first pending)
• Added questionReplyBusy signal for busy state
• Added respondQuestion() and rejectQuestion() API methods

UI (components/question-modal.tsx)

• Created QuestionModal component with:
  • Sequential wizard flow: "Question X of Y" navigation
  • Keyboard navigation: Arrow Up/Down + Enter
  • Multi-select support: Multiple options with checkmarks
  • Custom input: Free-text answer when custom: true
  • Auto-advance: Single-select options auto-advance to next question
  • Matching style with existing permission modal

Integration

• session.tsx: Rendered QuestionModal with props from store
• app.tsx: Wired up activeQuestion, questionReplyBusy, respondQuestion

Testing

1. Run pnpm dev:ui
2. Create a session
3. Send: "use the question tool to ask me if I like pizza"
4. Modal should appear with the question and options
5. Verify keyboard navigation (↑↓ + Enter) works
6. Verify multi-select and custom input work

TypeScript Build

pnpm tsc --noEmit  # passes with no errors

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

[benjaminshafii]

thx!