a block that lists every collection

The first block whose content is a QUERY rather than something somebody typed. It stores nothing at
all: a page holding "the collections" must not also hold a copy of which collections there were, or
adding one tomorrow would mean remembering to edit every page that lists them.

That makes it a places-only kind alongside the contact form and the partner row — one click to add, no
editor behind it. The hint says "every collection" rather than naming a picker, because there is
nothing to pick.

Gallery, Drops and Collabs all want the same shape. This is the one that decides it.

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

web/sections/PageBuilderPanel.tsx

@@ -22,6 +22,7 @@ const LABELS: Record<string, string> = {
   gallery: 'Gallery',
   'contact-form': 'Contact form',
   partners: 'Partners',
+  collections: 'Collections',
 };
 
 /*
@@ -30,7 +31,7 @@ const LABELS: Record<string, string> = {
   Both the picker and the canvas ask the same question — one to decide whether to open an editor, the
   other whether to draw an Edit button — and two lists would drift into a button that opens nothing.
 */
-const PLACES_ONLY: string[] = ['contact-form', 'partners'];
+const PLACES_ONLY: string[] = ['contact-form', 'partners', 'collections'];
 import { AddSectionDialog, type SectionLayout } from './AddSectionDialog';
 import { FreeTextEditor } from './FreeTextEditor';
 import { SpacingEditor, type Padding } from './SpacingEditor';