Live wall: pinned/docked cameras stop when their provider is switched off; admin-only empty-state CTA

- LiveView: localStorage pins carry image URLs, so they rendered (without
  credit) after an admin disabled the provider. Pins now show only while
  their provider is serving (server-26#198 licence gating).
- MapView: pinned/docked map players drop out once their provider leaves
  the serving list; credits are kept from the last answer so docked players
  keep attribution while the overlay is hidden.
- WallPanels: the "no camera provider enabled" link to /admin was a dead CTA
  for non-admins (bounced to /). Link shown to admins only, deep-linked to
  /admin#cameras; the admin page now honours a tab hash.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

drb-frontend/app/admin/page.tsx

@@ -1285,6 +1285,11 @@ export default function AdminPage() {
   const { user, isAdmin, loading: authLoading } = useAuth();
   const router = useRouter();
   const [tab, setTab] = useState<AdminTab>("features");
+  // Deep link to a tab (/admin#cameras), e.g. from the live wall's empty state.
+  useEffect(() => {
+    const h = window.location.hash.slice(1);
+    if (TAB_LABELS.some((t) => t.key === h)) setTab(h as AdminTab);
+  }, []);
 
   // Wait for the claims to resolve before deciding. isAdmin is false for the
   // first render of every cold load (typed URL, hard refresh, bookmark) while

drb-frontend/components/LiveView.tsx

@@ -145,6 +145,10 @@ export function LiveView() {
   }, [pointsById, nodes]);
   const { data: cams, loaded: camsLoaded } = useCamerasInBbox(regionBox);
   const feeds = useMemo(() => new Map(cams.providers.map((p) => [p.id, p])), [cams.providers]);
+  // Pins live in this browser and carry their image URLs, so a pin must not
+  // outlive its provider: once an admin switches a provider off (licence
+  // gating, server-26#198) its pinned cameras stop rendering until it is back.
+  const servingPinned = useMemo(() => pinned.filter((c) => feeds.has(c.provider)), [pinned, feeds]);
   const nearById = useMemo(() => {
     const m = new Map<string, NearCamera[]>();
     pointsById.forEach((pts, id) => m.set(id, nearestCameras(pts, cams.cameras)));
@@ -158,19 +162,19 @@ export function LiveView() {
   const selectedPoints = selected ? pointsById.get(selected.incident_id) ?? [] : [];
   const near = selected ? nearById.get(selected.incident_id) ?? [] : [];
   const drillCam: Camera | null = link.cam
-    ? cams.cameras.find((c) => c.id === link.cam) ?? pinned.find((c) => c.id === link.cam) ?? null
+    ? cams.cameras.find((c) => c.id === link.cam) ?? servingPinned.find((c) => c.id === link.cam) ?? null
     : null;
 
   // Region wall: pinned first, then the nearest camera to each major/moderate incident.
   const wallCameras = useMemo(() => {
-    const out: { cam: Camera; km?: number }[] = pinned.map((cam) => ({ cam }));
+    const out: { cam: Camera; km?: number }[] = servingPinned.map((cam) => ({ cam }));
     for (const inc of sorted) {
       if (severityRank(inc.severity) < 2) continue;
       const first = nearById.get(inc.incident_id)?.[0];
       if (first && !out.some((o) => o.cam.id === first.cam.id)) out.push({ cam: first.cam, km: first.km });
     }
     return out.slice(0, 6);
-  }, [pinned, sorted, nearById]);
+  }, [servingPinned, sorted, nearById]);
 
   // ── Navigation ────────────────────────────────────────────────────────────
   const selectIncident = useCallback((id: string) => setLink({ inc: id, cam: null, tour: false }), [setLink]);

drb-frontend/components/MapView.tsx

@@ -564,8 +564,16 @@ function DotCameraLayer({ onOpenCamera }: { onOpenCamera?: (c: Camera) => void }
   const shown = useOverlayShown(map, OVERLAY_DOT_CAMERAS);
   const zoom = useMapZoom(map);
   const { data, error, loaded } = useMapCameras(map, shown);
-  const [open, setOpen] = useState<OpenCamera[]>([]);
-  const feeds = useMemo(() => creditsByProvider(data.providers), [data.providers]);
+  const [openAll, setOpen] = useState<OpenCamera[]>([]);
+  // Credits from the last answer received while the overlay was on. Hiding the
+  // overlay empties `data`, but docked players stay up and still need their
+  // attribution. A pinned/docked camera whose provider an admin has since
+  // switched off (licence gating, server-26#198) drops out on the next answer.
+  const [feeds, setFeeds] = useState<Map<string, CameraProviderFeed>>(() => new Map());
+  useEffect(() => {
+    if (shown && loaded) setFeeds(creditsByProvider(data.providers));
+  }, [shown, loaded, data.providers]);
+  const open = useMemo(() => openAll.filter((o) => feeds.has(o.cam.provider)), [openAll, feeds]);
 
   const pinnedIds = useMemo(() => new Set(open.filter((o) => o.mode === "pin").map((o) => o.cam.id)), [open]);
   const cells = useMemo(

drb-frontend/components/live/WallPanels.tsx

@@ -10,6 +10,7 @@ import type {
   AircraftTrack, CallRecord, Camera, CameraCredit, CameraProviderFeed, IncidentRecord, Ny511Event, NodeRecord, VesselTrack,
 } from "@/lib/types";
 import { isKnownSeverity, SEVERITY_COLORS, SEVERITY_LABEL } from "@/lib/severity";
+import { useAuth } from "@/components/AuthProvider";
 import { CameraFeed } from "@/components/CameraFeed";
 import { MachineOutputNotice } from "@/components/ui/MachineOutputNotice";
 import { SourceCredit, fetchedLabel } from "@/components/SourceCredit";
@@ -43,11 +44,15 @@ export function CameraTile({ cam, feed, km, onOpen }: { cam: Camera; feed?: Came
 }
 
 function NoCameras({ servingCount, radiusKm }: { servingCount: number; radiusKm: number }) {
+  // Only admins can open /admin (everyone else is bounced to /), so only they get the link.
+  const { isAdmin } = useAuth();
   return (
     <p className="text-xs text-ink-muted">
-      {servingCount === 0
-        ? <>No camera provider is enabled. An admin turns them on under <Link href="/admin" className="underline">Admin → Camera providers</Link>.</>
-        : `No public camera within ${radiusKm} km.`}
+      {servingCount !== 0
+        ? `No public camera within ${radiusKm} km.`
+        : isAdmin
+          ? <>No camera provider is enabled. Turn one on under <Link href="/admin#cameras" className="underline">Admin → Camera providers</Link>.</>
+          : "No camera provider is enabled. A platform admin can turn them on."}
     </p>
   );
 }