LinkedIn post permalink: use Copy link, then pbpaste

On a LinkedIn recent-activity feed driven through claude-in-chrome, the post timestamp isn't a usable permalink target: find located it, but clicking it did not surface a URL. Use the post's menu and its copy-link action, then read the URL with pbpaste. This overwrites the user's clipboard, so warn them and re-copy anything they had queued, such as a drafted email. For finding people, keywords=<name> <company> is more reliable than guessing a currentCompany id, because a wrong id silently returns another company's staff.