PasstDazu driven by Products.relatedProduct; circle back on Focus icons

- PasstDazu.tsx now takes a productSlug prop and reads its cross-sell
  target from the product's own relatedProduct field (Payload) instead
  of hardcoding "todo-karten" — reusable on any product page now.
- payload.ts: Product/PayloadProduct gained relatedProduct, resolved via
  a bounded-recursion mapPayloadProduct call (safe — the fetch's depth:2
  means the nested relation's own relatedProduct is never populated).
- Focus.tsx icons: added the black stroked circle back around each glyph
  (matches icon-step-3.png exactly) — dropped in the previous pass by
  mistake while fixing the color/fill.

app/der-eine/components/Focus.tsx

@@ -1,14 +1,16 @@
 import type { ReactNode } from "react";
 import { Reveal, RevealGroup, RevealItem } from "../../components/Reveal";
 
-// Bold black outline, no fill, no container — matching /todo-cards' own
-// icon language (tool-icon-todo-karten.png, icon-step-2.png/icon-step-3.png:
-// thick uniform-weight black stroke, no color fill, no circle/badge
-// wrapper), not the thinner colored-badge treatment tried first.
+// Bold black outline, no fill, circled — matching /todo-cards'
+// icon-step-3.png exactly (a stroked circle around the glyph, same
+// uniform-weight black stroke as the glyph itself), not the plain
+// uncircled version tried right before this, nor the orange-badge version
+// tried before that.
 function IconBadge({ children }: { children: ReactNode }) {
   return (
-    <svg width="56" height="56" viewBox="0 0 28 28" fill="none" strokeWidth="2.2" stroke="#231f20" strokeLinecap="round" strokeLinejoin="round" className="h-14 w-auto shrink-0">
-      {children}
+    <svg width="56" height="56" viewBox="0 0 28 28" fill="none" strokeWidth="1.8" stroke="#231f20" strokeLinecap="round" strokeLinejoin="round" className="h-14 w-auto shrink-0">
+      <circle cx="14" cy="14" r="12.5" />
+      <g strokeWidth="1.5">{children}</g>
     </svg>
   );
 }
@@ -16,8 +18,8 @@ function IconBadge({ children }: { children: ReactNode }) {
 function IconPencil() {
   return (
     <IconBadge>
-      <path d="M18.5 4.5l5 5L9 24H4v-5L18.5 4.5z" />
-      <path d="M15.5 7.5l5 5" />
+      <path d="M17 8l3 3L10 21H7v-3L17 8z" />
+      <path d="M15 10l3 3" />
     </IconBadge>
   );
 }
@@ -25,8 +27,8 @@ function IconPencil() {
 function IconPen() {
   return (
     <IconBadge>
-      <path d="M6 22l3-1 13-13-2-2L7 19l-1 3z" />
-      <path d="M17 8l3 3" />
+      <path d="M9 19l2-0.7L20 9l-1.3-1.3L10 17l-1 2z" />
+      <path d="M17 9.5l1.5 1.5" />
     </IconBadge>
   );
 }
@@ -34,7 +36,7 @@ function IconPen() {
 function IconSparkle() {
   return (
     <IconBadge>
-      <path d="M14 3v8M14 17v8M3 14h8M17 14h8M6.5 6.5l5.5 5.5M16 16l5.5 5.5M21.5 6.5L16 12M12 16l-5.5 5.5" />
+      <path d="M14 6.5v4M14 17.5v4M6.5 14h4M17.5 14h4M9 9l2.5 2.5M16.5 16.5L19 19M19 9l-2.5 2.5M11.5 16.5L9 19" />
     </IconBadge>
   );
 }
@@ -42,7 +44,7 @@ function IconSparkle() {
 function IconShield() {
   return (
     <IconBadge>
-      <path d="M14 3l9 3.5v6c0 6-4 10-9 12.5-5-2.5-9-6.5-9-12.5v-6L14 3z" />
+      <path d="M14 6l6 2.3v4c0 4-2.7 6.6-6 8-3.3-1.4-6-4-6-8v-4L14 6z" />
     </IconBadge>
   );
 }

app/der-eine/components/PasstDazu.tsx

@@ -6,23 +6,25 @@ import { getProductBySlug } from "../../lib/payload";
 // Replaces the page's final price/buy bar entirely (explicit choice —
 // Hero.tsx already has the primary buy CTA, this page doesn't need a
 // second one at the very bottom too). Same "Passend dazu" card markup as
-// blog/[slug]/page.tsx's own related-product card (that one is driven by
-// Posts.relatedProduct, a per-post CMS field; this page hardcodes
-// "todo-karten" directly, same as Hero.tsx already hardcodes
-// "stift-kugelschreiber" — a fixed cross-sell, not a general relation).
-export async function PasstDazu() {
-  const product = await getProductBySlug("todo-karten");
-  if (!product?.href) return null;
+// blog/[slug]/page.tsx's own related-product card. Driven by
+// Products.relatedProduct (2026-08-25, same field/pattern as
+// Posts.relatedProduct, just product->product instead of post->product) —
+// reusable on any product page by passing that page's own product slug,
+// not hardcoded to "todo-karten" like the first version of this component.
+export async function PasstDazu({ productSlug }: { productSlug: string }) {
+  const product = await getProductBySlug(productSlug);
+  const related = product?.relatedProduct;
+  if (!related?.href) return null;
 
   return (
     <section className="w-full bg-bg-base px-[var(--layout-padding-x)] py-12 sm:py-16">
       <Reveal className="max-w-[48rem] mx-auto">
         <Link
-          href={product.href}
+          href={related.href}
           className="group flex items-center gap-4 sm:gap-6 border border-border rounded-md px-5 py-5 sm:px-9 sm:py-7 hover:border-brand transition-colors"
         >
           <div className="relative w-16 h-[4.6875rem] shrink-0 rounded-sm overflow-hidden">
-            <Image alt="" src={product.image} fill sizes="64px" className="object-cover" />
+            <Image alt="" src={related.image} fill sizes="64px" className="object-cover" />
           </div>
           <div className="flex-1 min-w-0 flex flex-col gap-2.5">
             <p className="font-bold text-[0.8125rem] text-brand">Passt dazu:</p>
@@ -32,9 +34,9 @@ export async function PasstDazu() {
                   className="font-semibold text-[1.375rem] text-text-primary sm:whitespace-nowrap"
                   style={{ fontFamily: "var(--font-lora)" }}
                 >
-                  {product.name}
+                  {related.name}
                 </p>
-                <p className="text-[0.9375rem] text-text-muted leading-[1.45]">{product.description}</p>
+                <p className="text-[0.9375rem] text-text-muted leading-[1.45]">{related.description}</p>
               </div>
               <span className="flex items-center gap-1.5 font-bold text-[0.875rem] text-text-primary whitespace-nowrap mt-1 sm:mt-0">
                 Entdecken

app/der-eine/page.tsx

@@ -44,7 +44,7 @@ export default async function DerEinePage() {
       <main className="flex flex-col flex-1">
         <Hero />
         <Focus />
-        <PasstDazu />
+        <PasstDazu productSlug="stift-kugelschreiber" />
       </main>
       <Footer />
     </>

app/lib/__tests__/cartTotals.test.ts

@@ -27,6 +27,7 @@ const product = (overrides: Partial<Product> = {}): Product => ({
   taxRatePercent: null,
   noShippingCost: false,
   categories: [],
+  relatedProduct: null,
   ...overrides,
 });
 

app/lib/payload.ts

@@ -251,6 +251,12 @@ export type Product = {
   // than "matches none", since an uncategorized product shouldn't just
   // disappear the moment a category filter is applied.
   categories: string[];
+  // Optional cross-sell pick (Products.relatedProduct) — powers a "Passt
+  // dazu" card on the product's own detail page, same field/pattern as
+  // Posts.relatedProduct. null means no card. Only one level deep (this
+  // related product's own relatedProduct is never resolved/shown) — see
+  // mapPayloadProduct's own comment.
+  relatedProduct: Product | null;
 };
 
 type PayloadProduct = {
@@ -288,6 +294,7 @@ type PayloadProduct = {
       }[]
     | null;
   categories: ({ name: string } | number)[] | null;
+  relatedProduct: PayloadProduct | number | null;
 };
 
 // A product/variant is only actually unbuyable when it opted into
@@ -354,6 +361,10 @@ export function mapPayloadProduct(product: PayloadProduct): Product {
     categories: (product.categories ?? [])
       .map((c) => (typeof c === "object" && c ? c.name : null))
       .filter((name): name is string => Boolean(name)),
+    // Recursive call is safe here — depth=2 on the originating fetch means
+    // this nested object's OWN relatedProduct is never populated (stays a
+    // raw id or absent), so the recursion bottoms out after exactly one level.
+    relatedProduct: typeof product.relatedProduct === "object" && product.relatedProduct ? mapPayloadProduct(product.relatedProduct) : null,
   };
 }