Replace real contact names with generic mock data in screenshots

- Change "Masha Broadbent" to "Alice Johnson"
- Change "John Smith" to "Bob Williams"
- Regenerate all screenshots with mock data (--force-no-fda)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ndbroadbent