feat(ui): Warenkorb-Seite mit Fortschritt zum Mengenrabatt

- Weg zum Mengenrabatt als sich fuellender Balken (gleiche Schwelle wie
  bisher der Texthinweis), erreichter Rabatt als Bestaetigung mit Wabe
- Positionen gleiten herein und beim Entfernen hinaus, Entfernen-Knopf
  als gezeichnetes Symbol statt Textzeichen
- Artikelnamen und Preise in Serifenschrift, Gesamtsumme tickt bei jeder
  Aenderung, Zusammenfassung laeuft beim Scrollen mit

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

src/app/warenkorb/warenkorb-content.tsx

@@ -1,6 +1,8 @@
 "use client";
 
+import { AnimatePresence, motion } from "motion/react";
 import Link from "next/link";
+import { HexCheck } from "@/components/honeycomb";
 import { Container, SectionHeading, LinkButton } from "@/components/ui";
 import { TrustBadges } from "@/components/trust-badges";
 import { CartItemThumbnail } from "@/components/cart-item-thumbnail";
@@ -76,13 +78,21 @@ export function WarenkorbContent({
         ) : (
           <div className="mt-14 grid lg:grid-cols-3 gap-14">
             <div className="lg:col-span-2 divide-y divide-ink/10 border-y border-ink/10">
+              <AnimatePresence initial={false}>
               {items.map((item) => {
                 const itemStock = stock?.[item.productId];
                 return (
-                  <div key={item.productId} className="py-6 flex flex-wrap items-center gap-x-6 gap-y-3">
+                  <motion.div
+                    key={item.productId}
+                    layout
+                    initial={{ opacity: 0, y: 12 }}
+                    animate={{ opacity: 1, y: 0 }}
+                    exit={{ opacity: 0, x: 40, transition: { duration: 0.2 } }}
+                    className="py-6 flex flex-wrap items-center gap-x-6 gap-y-3"
+                  >
                     <CartItemThumbnail image={item.image} className="w-20 h-20 flex-shrink-0 rounded-lg" />
                     <div className="flex-1 min-w-[160px]">
-                      <Link href={`/honig/${item.slug}`} className="text-lg text-forest">
+                      <Link href={`/honig/${item.slug}`} className="link-draw pb-0.5 font-serif text-2xl text-forest">
                         {item.name}
                       </Link>
                       <p className="text-sm text-ink/65">{item.weightGrams} g</p>
@@ -103,31 +113,34 @@ export function WarenkorbContent({
                         onChange={(quantity) => setQuantity(item.productId, quantity)}
                         max={itemStock ?? 10}
                       />
-                      <span className="w-20 text-right text-ink">
+                      <span className="w-24 text-right font-serif text-xl text-forest tabular-nums">
                         {formatPrice(item.priceCents * item.quantity, "EUR", locale)}
                       </span>
                       <button
                         onClick={() => removeItem(item.productId)}
                         aria-label={t.cart.remove}
-                        className="text-ink/65 hover:text-ink"
+                        className="flex h-9 w-9 items-center justify-center text-ink/55 transition-[color,transform] duration-300 hover:rotate-90 hover:text-red-700"
                       >
-                        ✕
+                        <svg viewBox="0 0 24 24" className="h-4 w-4" fill="none" stroke="currentColor" strokeWidth="1.6" aria-hidden="true">
+                          <path d="M6 6l12 12M18 6L6 18" strokeLinecap="round" />
+                        </svg>
                       </button>
                     </div>
-                  </div>
+                  </motion.div>
                 );
               })}
+              </AnimatePresence>
             </div>
 
-            <div className="border border-ink/10 p-8 h-fit">
+            <div className="border border-ink/10 bg-background p-8 h-fit lg:sticky lg:top-28">
               <div className="space-y-3 text-sm">
                 <div className="flex justify-between">
                   <span>{t.cart.subtotal}</span>
-                  <span>{formatPrice(subtotal, "EUR", locale)}</span>
+                  <span className="tabular-nums">{formatPrice(subtotal, "EUR", locale)}</span>
                 </div>
                 <div className="flex justify-between">
                   <span>{t.cartPage.shippingLabel(totalQuantity)}</span>
-                  <span>{shipping === 0 ? t.cartPage.free : formatPrice(shipping, "EUR", locale)}</span>
+                  <span className="tabular-nums">{shipping === 0 ? t.cartPage.free : formatPrice(shipping, "EUR", locale)}</span>
                 </div>
                 {nextTier && nextTier.unitsUntilNext <= 2 ? (
                   <p className="text-xs text-ink/70">
@@ -135,20 +148,47 @@ export function WarenkorbContent({
                   </p>
                 ) : null}
                 {activeBulkDiscount ? (
-                  <div className="flex justify-between text-forest">
+                  <motion.div
-                    <span>
+                    initial={{ opacity: 0, scale: 0.96 }}
+                    animate={{ opacity: 1, scale: 1 }}
+                    transition={{ type: "spring", stiffness: 380, damping: 22 }}
+                    className="flex items-center justify-between rounded-sm bg-honey/10 px-3 py-2 text-forest"
+                  >
+                    <span className="flex items-center gap-2">
+                      <HexCheck className="h-4 w-4 text-honey-dark" />
                       {t.cartPage.discountLabel} ({activeBulkDiscount.percent}%)
                     </span>
-                    <span>-{formatPrice(bulkDiscountCents, "EUR", locale)}</span>
+                    <span className="tabular-nums">-{formatPrice(bulkDiscountCents, "EUR", locale)}</span>
-                  </div>
+                  </motion.div>
                 ) : nextBulkDiscount && nextBulkDiscount.unitsUntilNext <= 2 ? (
-                  <p className="text-xs text-ink/70">
+                  // Der Weg zum Mengenrabatt als Glas, das sich mit jedem
+                  // weiteren Stueck fuellt — nicht nur als Kleingedrucktes.
+                  <div className="rounded-sm bg-honey/[0.07] px-3 py-3">
+                    <p className="text-xs text-ink/75">
                       {t.cartPage.bulkDiscountProgress(nextBulkDiscount.unitsUntilNext, nextBulkDiscount.percent)}
                     </p>
+                    <div aria-hidden="true" className="mt-2 h-1.5 overflow-hidden rounded-full bg-ink/10">
+                      <motion.div
+                        className="h-full rounded-full bg-gradient-to-r from-honey-dark to-honey"
+                        initial={false}
+                        animate={{
+                          width: `${(totalQuantity / (totalQuantity + nextBulkDiscount.unitsUntilNext)) * 100}%`,
+                        }}
+                        transition={{ type: "spring", stiffness: 120, damping: 20 }}
+                      />
+                    </div>
+                  </div>
                 ) : null}
-                <div className="flex justify-between text-base text-forest pt-3 border-t border-ink/10">
+                <div className="flex items-baseline justify-between text-forest pt-4 border-t border-ink/10">
-                  <span>{t.cartPage.total}</span>
+                  <span className="text-base">{t.cartPage.total}</span>
-                  <span>{formatPrice(subtotal - bulkDiscountCents + shipping, "EUR", locale)}</span>
+                  <motion.span
+                    key={subtotal - bulkDiscountCents + shipping}
+                    initial={{ opacity: 0.4, y: -4 }}
+                    animate={{ opacity: 1, y: 0 }}
+                    className="font-serif text-3xl tabular-nums"
+                  >
+                    {formatPrice(subtotal - bulkDiscountCents + shipping, "EUR", locale)}
+                  </motion.span>
                 </div>
               </div>
               <LinkButton href="/checkout" className="w-full mt-6">
@@ -164,10 +204,10 @@ export function WarenkorbContent({
 
         {items.length > 0 && crossSellProducts.length > 0 ? (
           <div className="mt-20">
-            <h2 className="text-2xl text-forest mb-8">{t.productPage.relatedProductsHeading}</h2>
+            <h2 className="text-3xl md:text-4xl text-forest mb-10">{t.productPage.relatedProductsHeading}</h2>
             <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-x-8 gap-y-14">
-              {crossSellProducts.map((product) => (
+              {crossSellProducts.map((product, index) => (
-                <ProductCard key={product.id} product={product} />
+                <ProductCard key={product.id} product={product} index={index} />
               ))}
             </div>
           </div>