fix: layer-tag mismatches + libs/beheer title rule (RD-28)

Two components disagreed with their own story title. async.component.ts
had no layer tag; add `Molecule:` to its class header, not to the
Convenience: comment on the ASYNC array (that comment describes an
export, not a layer, and stays as it is). breadcrumb.component.ts had
`Chrome:`; rename it to `Molecule:` to match its story title.

CLAUDE.md and layers.mdx both claimed `libs/beheer/ui` is Design System.
The code disagrees: its story title is `Domein/Beheer/...`, because
libs/beheer is a bounded context that lives under libs/ only because two
apps share it. Fix the two doc lines to match the code; the story title
does not change.

The ticket's own tag-count check asserted 68 after the edits, but adding
a new tag to async.component.ts (which had none) is a net +1 over the
Chrome-to-Molecule rename (a wash) — the true post-edit count is 69.
Corrected the number in the ticket text rather than deleting the
mandated tag to force the wrong count. Also fixed pre-existing invalid
nested-backtick markdown in the ticket's decision 4 bullets: prettier
mis-rewrapped it and dropped spaces, so the phrasing was rewritten in
valid CommonMark with no change in meaning.

npm run ci --full passes.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

libs/shared/docs/layers.mdx

@@ -9,8 +9,8 @@ This project is **domain-driven**: the code is organised first by **bounded cont
 with dependencies pointing inward. The Storybook sidebar is laid out to **be** that
 architecture, not just document it: **Foundations** (this curriculum) → **Design System**
 (reusable, domain-free) → **Domein** (the app-local DDD contexts). If a component lives
-under a context's `ui/`, it's in Domein; everything else in `libs/shared/ui`/`layout`
-(or `libs/beheer/ui`) is Design System. See [Atomic design](?path=/docs/foundations-atomic-design--docs)
+under a context's `ui/`, or under `libs/beheer/ui`, it's in Domein; everything else in
+`libs/shared/ui`/`layout` is Design System. See [Atomic design](?path=/docs/foundations-atomic-design--docs)
 for the Atoms → Molecules → Organisms → Templates ladder inside Design System.
 
 ## Two apps, two shared libraries

libs/shared/src/layout/breadcrumb/breadcrumb.component.ts

@@ -6,7 +6,7 @@ export interface BreadcrumbItem {
   link?: string; // omit on the current (last) page
 }
 
-/** Chrome: breadcrumb navigation, styled for the CIBG titlebar (`.titlebar .title`) —
+/** Molecule: breadcrumb navigation, styled for the CIBG titlebar (`.titlebar .title`) —
     plain links with a chevron `::after` from the CIBG Icons font, current page as an
     unlinked, bold span. Domain-free — the caller supplies the trail. */
 @Component({

libs/shared/src/ui/molecules/async/async.component.ts

@@ -43,7 +43,7 @@ export class AsyncErrorDirective {
 }
 
 /**
- * Renders exactly ONE of loading / empty / error / loaded for a signal-based
+ * Molecule: renders exactly ONE of loading / empty / error / loaded for a signal-based
  * resource (e.g. httpResource). Built on a RemoteData tagged union (see
  * core/remote-data.ts), so the states are mutually exclusive by construction —
  * the UI can never show two at once ("impossible states"). Unprovided slots