Discount codes:
- New shared lib/cartTotals.ts (computeSubtotal/computeCartTotals) factored
out of the previously-triplicated subtotal/totalSavings/total math in
CartContent/CheckoutContent/BestellbestaetigungContent, extended to also
fold in a discount amount (percent or fixed, clamped so total can't go
negative).
- lib/discount.ts mirrors lib/cart.ts's exact localStorage pattern so an
applied code survives the /cart -> /checkout transition without a second
input field — Checkout only displays it.
- New /api/discount/validate (read-only check) and /api/discount/redeem
(re-validates + increments the redemption counter, called once from
checkout's handlePurchase right before the OrderSnapshot is written).
Both talk to Payload's new discount-codes collection through
lib/discountServer.ts, a server-only module kept separate from
lib/payload.ts on purpose (that file is also imported by "use client"
components; the RSC-boundary break hit earlier this session was exactly
this mistake with next/headers).
- OrderSnapshot gains discountCode/discountAmount so /bestellbestaetigung
displays what was actually applied instead of losing it on recompute.
RelatedProducts: no longer falls back to re-suggesting a product already
in the cart just to pad the grid out to 3 cards — shows only the
genuinely available remainder (down to 1 card), centered in the 12-column
grid instead of left-aligned.
Testimonials on /todo-cards, /newsletter, /challenge now come from the new
Payload testimonials collection via a shared TestimonialsGrid component,
instead of 3 separately hardcoded arrays.
Adds Next.js Draft Mode (/api/preview) plus Live-Preview-aware client
wrappers (LiveRichText, LiveTestimonialsGrid, LivePostContent) for posts,
legal pages, and testimonials — mounted only while Draft Mode is enabled,
so ordinary visitors keep getting the plain static components.
Products now come from Payload's new "products" collection instead of a
hardcoded catalog, same pattern already used for blog posts:
- lib/payload.ts: getProducts()/getProductBySlug() (server-side fetch,
60s ISR)
- New /api/products route so client components (CartContent,
RelatedProducts) can reach the same data without a server-only import
- lib/products.ts: useProducts() hook replacing the old PRODUCTS record
- ProductGrid (/shop) fetches server-side directly; now shows all
catalog products except notizbuch-klarheit (matches Figma's 4-card
page-shop-overview — still cross-sold via RelatedProducts)
- ProductSpotlight and /todo-cards' Pricing now pull price/photo from
the same CMS product instead of a separately hardcoded "12,90 €", so
the two can't silently drift apart
- formatPrice moved to a new lib/format.ts (plain, no "use client") —
Server Components can't call functions exported from a "use client"
module directly, which lib/products.ts now is because of the hook
Also fixes two unrelated bugs surfaced along the way: the add-to-cart
button visibly resizing when its "Hinzugefügt ✓" success state showed
(fixed with a CSS-grid text stack sized to the wider of the two
strings), and removes the now-unused local product images from public/.
Marco