feat(web): desktop mode in site origin view with screenshot fallback

Uses the desktop iframe when the backend reports it available and the page is
a secure context; otherwise falls back to screenshot mode and says why.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/routes/console/sites.$siteId.tsx

@@ -19,7 +19,7 @@ import { useInventory } from "~/api/inventory.ts";
 import { type ReleaseFilters, useSiteReleases } from "~/api/releases.ts";
 import { snapshotStale, useSites, useSnapshotSite } from "~/api/sites.ts";
 import { openAgentDrawer } from "~/components/agent/agent-store.ts";
-import { SiteOriginView } from "~/components/browser/site-origin-view.tsx";
+import { SiteOriginPanel } from "~/components/browser/desktop-view.tsx";
 import { DetailSection } from "~/components/console/detail-sheet.tsx";
 import { EmptyState, ErrorState, LoadingState } from "~/components/console/empty-state.tsx";
 import { FilterBar, FilterSelect } from "~/components/console/filter-bar.tsx";
@@ -421,7 +421,7 @@ export default function SiteWorkbenchPage() {
           </div>
         </TabsContent>
 
-        <TabsContent value="origin">{s ? <SiteOriginView site={s} /> : <LoadingState rows={4} />}</TabsContent>
+        <TabsContent value="origin">{s ? <SiteOriginPanel site={s} /> : <LoadingState rows={4} />}</TabsContent>
 
         <TabsContent value="snapshots">
           <div className="space-y-8">