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/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