a gallery is a carousel

It always rendered as one — data-carousel, a snap track, two arrows, driven by
carousel.client.js. The entity was the last thing still calling it something
else, and that collided with the site's own Gallery section: two nav rows
reading Gallery and Galleries, meaning a list of objects and a list of
photograph sets.

GalleriesPanel, GalleryPicker and GalleryItems become Carousels*, the endpoint
becomes /fofos-admin/carousels, the block kind becomes carousel and
subject-gallery becomes subject-carousel. The publish allowlist follows the
renamed tables.

What did NOT move: GALLERY_CONFIG at /fofos-admin/gallery, subjects.ts's
base '/gallery', and home_gallery_media. Those are the Gallery section and the
legacy rows, and both are correct.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

web/sections/HomePanel.tsx

@@ -48,7 +48,7 @@ type Home = {
   /** The OLD per-page list. Still returned by the API, and only rendered while no gallery is chosen. */
   gallery: GalleryItem[];
   /** Which gallery the carousel shows. Null means the old list above still applies. */
-  gallery_id: number | null;
+  carousel_id: number | null;
 };
 
 type Gallery = { id: number; name: string; slug: string; items: unknown[] };
@@ -65,7 +65,7 @@ export const HomePanel = () => {
   const [error, setError] = useState<string | null>(null);
   const [saved, flashSaved] = useFlash();
   const [picking, setPicking] = useState(false);
-  const [galleries, setGalleries] = useState<Gallery[]>([]);
+  const [carousels, setCarousels] = useState<Gallery[]>([]);
 
   /** Every write answers with the whole payload, so this is the only place state is set. */
   const apply = useCallback((data: Home) => {
@@ -87,13 +87,13 @@ export const HomePanel = () => {
     void load();
   }, [load]);
 
-  // The galleries to choose between, read from the section that owns them rather than embedded in the
+  // The carousels to choose between, read from the section that owns them rather than embedded in the
   // home payload — a copy there would go stale the moment somebody edited one.
   useEffect(() => {
     void clientRef.current
-      .get<{ data: Gallery[] }>('/fofos-admin/galleries')
-      .then((response) => setGalleries(response.data))
-      .catch(() => setGalleries([]));
+      .get<{ data: Gallery[] }>('/fofos-admin/carousels')
+      .then((response) => setCarousels(response.data))
+      .catch(() => setCarousels([]));
   }, []);
 
   const send = async (label: string, call: () => Promise<{ data: Home }>) => {
@@ -217,15 +217,15 @@ export const HomePanel = () => {
           A picker, not a list.
 
           Managing items here would be a second editor for something that already has one, and the two
-          would drift: a caption fixed in one place and not the other. The page chooses; the Galleries
+          would drift: a caption fixed in one place and not the other. The page chooses; the Carousels
           section arranges.
         */}
         <select
-          value={home.gallery_id ?? ''}
+          value={home.carousel_id ?? ''}
           onChange={(event) =>
-            void send('gallery', () =>
+            void send('carousel', () =>
               clientRef.current.patch<{ data: Home }>('/fofos-admin/home', {
-                gallery_id: event.target.value ? Number(event.target.value) : null,
+                carousel_id: event.target.value ? Number(event.target.value) : null,
               }),
             )
           }
@@ -233,7 +233,7 @@ export const HomePanel = () => {
           className="w-full rounded-md border border-border bg-background px-3 py-2 text-xs"
         >
           <option value="">None</option>
-          {galleries.map((gallery) => (
+          {carousels.map((gallery) => (
             <option key={gallery.id} value={gallery.id}>
               {gallery.name} · {gallery.items.length} item{gallery.items.length === 1 ? '' : 's'}
             </option>
@@ -242,7 +242,7 @@ export const HomePanel = () => {
 
         {/* Only while it is true: the old rows are what renders until a gallery is chosen, and saying so
             beats a carousel that appears to come from nowhere. */}
-        {home.gallery_id === null && home.gallery.length > 0 && (
+        {home.carousel_id === null && home.gallery.length > 0 && (
           <p className="text-xs text-muted-foreground/70">
             Showing {home.gallery.length} item{home.gallery.length === 1 ? '' : 's'} from the old
             per-page list. Choosing a gallery replaces it.