feat(blog): optional quote label + swappable related-product card per post

Both were fully hardcoded before: every blockquote showed a static
"Merke dir:" label, and every post's "Passend dazu" card always linked
the same flagship product. Now driven by two new Posts fields —
quoteLabel (empty hides the label/icon/underline, blockquote still
renders) and relatedProduct (empty hides the card entirely) — mirroring
Products.spotlight but per-post instead of a single site-wide flag.

README's collection table updated to match today's Payload changes
(shipping-settings, the new Posts fields, trust-badges' placeholder
tokens, admin sidebar grouping) — also fixed a stale claim that `media`
isn't tenant-scoped; it already was.

app/lib/payload.ts

@@ -71,9 +71,21 @@ export async function getBlogPosts(limit = 3): Promise<BlogPost[]> {
 
 export type PostDetail = BlogPost & {
   content: unknown;
+  /** Label for every blockquote callout in this post's content (icon +
+   * underline included) — empty string hides that left side entirely,
+   * the blockquote itself still renders. See RichText.tsx's "quote" case. */
+  quoteLabel: string;
+  /** Powers the "Passend dazu" card at the end of the post — null hides
+   * the card entirely, per-post choice (unlike Products.spotlight, which
+   * is a single site-wide flag). */
+  relatedProduct: Product | null;
 };
 
-type PayloadPostDetail = PayloadPost & { content: unknown };
+type PayloadPostDetail = PayloadPost & {
+  content: unknown;
+  quoteLabel: string | null;
+  relatedProduct: PayloadProduct | null;
+};
 
 export async function getPostBySlug(slug: string): Promise<PostDetail | null> {
   const params = new URLSearchParams({
@@ -107,6 +119,8 @@ export async function getPostBySlug(slug: string): Promise<PostDetail | null> {
     content: doc.content,
     publishedAt: doc.publishedAt,
     featured: doc.featured,
+    quoteLabel: doc.quoteLabel ?? "",
+    relatedProduct: doc.relatedProduct ? mapPayloadProduct(doc.relatedProduct) : null,
   };
 }
 
@@ -136,6 +150,22 @@ type PayloadProduct = {
   detailHref: string | null;
 };
 
+// Shared by getProducts() and getPostBySlug()'s relatedProduct — kept in
+// one place instead of duplicating the same field mapping, which is
+// exactly the kind of drift this session's Shipping Settings work was
+// about eliminating elsewhere.
+function mapPayloadProduct(product: PayloadProduct): Product {
+  return {
+    id: product.slug,
+    name: product.name,
+    description: product.description ?? "",
+    price: product.price,
+    compareAtPrice: product.compareAtPrice ?? null,
+    image: typeof product.image === "object" && product.image ? product.image.url : "",
+    href: product.detailHref || null,
+  };
+}
+
 export async function getProducts(): Promise<Product[]> {
   const params = new URLSearchParams({
     "where[tenant.slug][equals]": TENANT_SLUG,
@@ -154,15 +184,7 @@ export async function getProducts(): Promise<Product[]> {
 
   const data: { docs?: PayloadProduct[] } = await res.json();
   const docs = Array.isArray(data.docs) ? data.docs : [];
-  return docs.map((product) => ({
-    id: product.slug,
-    name: product.name,
-    description: product.description ?? "",
-    price: product.price,
-    compareAtPrice: product.compareAtPrice ?? null,
-    image: typeof product.image === "object" && product.image ? product.image.url : "",
-    href: product.detailHref || null,
-  }));
+  return docs.map(mapPayloadProduct);
 }
 
 export async function getProductBySlug(slug: string): Promise<Product | null> {