Keep listed published rules public and guest-claim rules unlisted, with semantic document markup and share chrome that stays clickable.

Guest publishes remain share-by-link but stay out of the catalog and sitemap, and their pages send noindex until claimed. The published-rule view now uses heading and list markup matching Markdown export, and top banners sit below the header so Share is not covered.

Co-authored-by: Cursor <cursoragent@cursor.com>

CONTRIBUTING.md

@@ -90,7 +90,7 @@ All routes return JSON. Non-`GET` requests expect
 
 | Method | Path | Purpose |
 | --- | --- | --- |
-| GET, POST | `/api/rules` | List or publish rules. |
+| GET, POST | `/api/rules` | Public catalog of listed rules, or publish. |
 | GET | `/api/rules/me` | Owner's published rules. |
 | GET, PATCH, DELETE | `/api/rules/[id]` | Public read; owner update / delete. |
 | POST | `/api/rules/[id]/duplicate` | Owner clone. |