support.claude.com Fin AI Agent chat: composer input field missing after accepting terms

Bug Description

On https://support.claude.com, after opening the Fin AI Agent (Intercom chatbot) and accepting the privacy terms, the text input composer does not render. The bot asks "請告訴我們您的詢問是關於什麼的" (Please tell us what your inquiry is about) but there is no way to type a response.

Steps to Reproduce

1. Go to https://support.claude.com
2. Click the Intercom chat widget (bottom right)
3. Open "Fin AI Agent"
4. Accept the privacy/data usage terms
5. Bot responds with a conversation ID and asks what your question is about
6. No text input field appears — cannot type anything

Technical Details

Inspected the Intercom messenger iframe DOM:

• composer-suggestions-container div exists but has height: 0
• A suggestion button ("使用與限制") exists inside but has display: none
• No <input>, <textarea>, or [contenteditable] element exists in the entire iframe
• The DOM jumps straight from the last message to #anchor-bottom

The composer shell is present in the DOM structure, but the actual text input element was never rendered.

Expected Behavior

After accepting terms, a text input field should appear at the bottom of the chat so the user can describe their support issue.

Environment

• Browser: Chrome (latest)
• URL: https://support.claude.com/zh-TW/
• Chat widget: Intercom Fin AI Agent
• Date: 2026-04-10