- admin_welcome.html: update subtitle, description, placeholder cheatsheet
(drop tables/metrics/marketplaces/sync_interval; add user-null note and
security note). Textarea initial value is now empty (no default template
to show). Preview pane uses innerHTML (HTML output). refreshStatus sets
editor to empty when no override. Preview pane styled as light surface.
Reset modal copy updated (no banner shown, not "OSS-shipped template").
- config/claude_md_template.txt: deleted (markdown template is gone;
default is now no banner).
- docs/agent-setup-prompt.md: rewritten for variant C — describes the
/setup banner, smaller placeholder table, security/sanitization notes,
anonymous-user guard, example HTML snippet.