Replace "you/your" with impersonal alternatives across all user-facing strings in templates, CLI output, error messages, and documentation. Add copy style rule to CLAUDE.md.
- Rename account.{rs,html} → admin.{rs,html} in app, api, and templates - Update route /account → /admin - Rename AccountTemplate → AdminTemplate, account_page → admin_page - Update nav link, test function names, and CLAUDE.md references