skills(ui): pages.md Routing model teaches the doc navigation item; eval 4 expects it

The published skill said "There is no dedicated `doc` nav-item type yet, so
use a `url` item pointing at `/docs/...`" while `@objectstack/spec` declares
the `doc` navigation item (`{ type: 'doc', doc }` / `{ type: 'doc', book }`)
and the console renders it. The Routing model paragraph and its example now
teach the declared item; eval 4's expected output and assertions pin the
`doc` item and refuse the `url` answer. Paid inside the token ratchet by
deleting the former-page-types sentence the Page Types lead restates.

Co-authored-by: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CXydFDyiQwNbGFkmwrcRQq

Author: objectstack-fleet[bot]

skills/objectstack-ui/evals/views-apps-actions-pages.json

@@ -34,11 +34,11 @@
     {
       "id": 4,
       "prompt": "Design a custom lead record page: the Convert action inline in the header, a highlights strip, a stage path over `status`, and the related contacts. Also write a user guide for the `crm` package under src/docs and link it from the nav.",
-      "expected_output": "`definePage({ name, label, type: 'record', object: 'lead', template: 'three-column', regions: [...] })` with `page:header` (the declared action's id in `properties.actions`, no sibling action node), `record:highlights`, `record:path` (`statusField`, `stages`), `record:related_list`. The guide is a flat, namespace-prefixed `src/docs/crm_user_guide.md` in pure Markdown (MDX and image references are rejected at build), surfaced by a `type: 'url'` nav item pointing at `/docs/crm_user_guide`.",
+      "expected_output": "`definePage({ name, label, type: 'record', object: 'lead', template: 'three-column', regions: [...] })` with `page:header` (the declared action's id in `properties.actions`, no sibling action node), `record:highlights`, `record:path` (`statusField`, `stages`), `record:related_list`. The guide is a flat, namespace-prefixed `src/docs/crm_user_guide.md` in pure Markdown (MDX and image references are rejected at build), surfaced by a `type: 'doc'` nav item (`doc: 'crm_user_guide'`).",
       "files": [],
       "assertions": {
-        "must_contain": ["definePage", "type: 'record'", "regions", "page:header", "record:path", "src/docs/", "/docs/"],
-        "must_not_contain": ["record_detail", ".mdx"]
+        "must_contain": ["definePage", "type: 'record'", "regions", "page:header", "record:path", "src/docs/", "type: 'doc'"],
+        "must_not_contain": ["record_detail", ".mdx", "type: 'url'"]
       }
     },
     {

skills/objectstack-ui/rules/pages.md

@@ -31,9 +31,7 @@ Disambiguation: there is **no** `record_detail`, `app_launcher`, or
 `type: 'app'`, a utility panel is `type: 'utility'`. Likewise
 grid/kanban/calendar/gallery/timeline are NOT page types — they are
 *visualizations* of a `list` page
-(`interfaceConfig.appearance.allowedVisualizations`). Former roadmap-only types
-(`dashboard`, `form`, `record_detail`, `record_review`, `overview`, `blank`)
-were removed from the enum because they never shipped a renderer.
+(`interfaceConfig.appearance.allowedVisualizations`).
 
 ### Templates & Regions
 
@@ -357,13 +355,15 @@ resolves any doc regardless of which app you came from. The URL is
 one URL. Do **not** design per-app or per-package doc URLs; that gives one
 doc many addresses and breaks cross-references.
 
-To surface a doc inside an app, add a navigation item that **links into**
-that global URL. There is no dedicated `doc` nav-item type yet, so use a
-`url` item pointing at `/docs/<name>`:
+To surface a doc inside an app, add a `doc` navigation item (a `url` item is
+for an external or custom URL): `doc: '<name>'` opens that page,
+`book: '<book>'` opens the book at its first readable page (both: that page
+in that book). It inherits the docs audience gate, and `os build` refuses a
+target the package lacks (`docs/nav-target`):
 
 ```typescript
 navigation: [
-  { id: 'nav_help', type: 'url', url: '/docs/crm_user_guide',
+  { id: 'nav_help', type: 'doc', doc: 'crm_user_guide',
     label: 'User Guide', icon: 'book-open' },
 ]
 ```