Email addresses automatically converted to mailto links, preventing plain text copying

Description:
When Claude Code displays email addresses in responses, they are automatically converted to clickable mailto: links. This prevents users from copying plain email addresses for use in other applications.

Steps to reproduce:

1. Ask Claude Code to display a list of email addresses
2. Try to copy the email addresses from the response
3. The copied text includes "mailto:" prefixes

Expected behavior:
Email addresses should be copyable as plain text without mailto: prefixes

Actual behavior:
Email addresses are copied with mailto: prefixes, making them unusable for pasting into applications like Slack, spreadsheets, etc.

Workaround:
Writing the email addresses to a file allows copying the plain text content.

Impact:
This affects workflows where users need to copy email lists for external use (e.g., Slack invitations, mailing lists, etc.).