- Add Form UI component schema in navi/mcp/ui_server/components/form.py
- Support text, textarea, number, email, url, select, multiselect, checkbox, date fields
- Implement hidden user message mode for form submissions (is_display=False, is_context=True)
- Add WebSocket form_submit handling and _start_agent_run helper
- Render forms client-side with real-time JS validation in webclient
- Submit once guard via localStorage and replace form with read-only summary
- Provide wsSend via Vue provide/inject in ChatArea
- Add tests for backend form component, websocket form_submit, and frontend Form.vue
- Update docs/tools.md and docs/websocket.md
- Build production webclient dist

Co-Authored-By: Claude <noreply@anthropic.com>