Step 15 (v4.3 Sesjon 3 — Wave 3) — wires the dashboard fleet-tiles
to a drill-down view with breadcrumb update + back-to-dashboard
navigation + browser back/forward restoration via popstate.
renderArtifactDetail(artifactKey) renders the chosen artifact into
the #voyage-detail slot using renderPageShell + renderArtifact:
- brief / plan / review → markdown render
- progress → JSON pretty-print in <pre>
- research → list of all research-briefs
- missing entry → "Artifact mangler" placeholder
Click delegation on .fleet-tile[data-artifact] triggers detail render
+ pushDetailURL (?artifact=<key>); data-action=back-to-dashboard
returns to the dashboard view + pushDashboardURL. Topbar breadcrumb
gets a third segment for detail views.
URL-parameter deep-linking: at page-load, ?project=<basePath>
surfaces a guide-panel hint explaining that webkitdirectory requires
a user-gesture; the hint links to the same Last prosjektmappe button
that wireProjectLoader already exposes. popstate handler restores
the view-state on browser back/forward (no-op when no project loaded).
Test additions (4): renderArtifactDetail function, URLSearchParams
presence, data-action=back-to-dashboard attribute, popstate listener.