docs: link-import in anleitung, changelog und screenshots

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
feat(katalog): set aus einem link uebernehmen
2026-10-25 16:03:00 +01:00 · 2026-10-25 16:03:00 +01:00 · 2026-10-25 15:39:55 +01:00 · 2026-10-25 15:39:55 +01:00 · 2026-10-25 15:39:55 +01:00 · 2026-10-25 15:26:27 +01:00
65 changed files with 3400 additions and 962 deletions
@@ -7,6 +7,61 @@ die Versionierung [Semantic Versioning](https://semver.org/lang/de/).

 ## [Unreleased]

+### Hinzugefügt
+
+- **Set aus einem Link übernehmen**, für alle Hersteller: Amazon, idealo,
+  geizhals, Hersteller-Shops, Brickfact oder Merlins Bricks. Bricktrack liest
+  Produktdaten (schema.org, Open Graph, bei Amazon die Produktseite) und, wenn
+  die Seite blockt, den Link selbst. Lego wird über Rebrickable ergänzt,
+  BlueBrixx und Cobi über Merlins Bricks. Das Ergebnis füllt das Formular vor,
+  das Bild wird beim Speichern lokal abgelegt.
+
+### Sicherheit
+
+- Abrufe im Auftrag eines Nutzers gehen nur an öffentliche Adressen: Jede
+  Adresse wird vor dem Verbindungsaufbau geprüft, Weiterleitungen ebenso,
+  Größe und Zeit sind begrenzt.
+
+## [0.4.0] - 2026-10-25
+
+Ein neues Gesicht: Bricktrack sieht jetzt aus wie das, was es verwaltet.
+Dazu alle bekannten Sicherheitslücken in den Abhängigkeiten geschlossen.
+
+### Sicherheit
+
+- Next.js 15.5.28: schließt unter anderem eine Denial-of-Service-Lücke über
+  Server Actions und Cache-Poisoning bei selbst gehosteten Instanzen. Die
+  kritische Lücke in der Bildoptimierung war hier nicht ausnutzbar
+  (`images.unoptimized`), ist aber ebenfalls behoben.
+- nodemailer 10.2: mehrere Fehler im Adressparser (Erinnerungs-Mails).
+- better-auth 1.7.12, sharp 0.35.5 (librsvg), zod 4.6.7 (Speicherverbrauch
+  bei übergroßen Eingaben), drizzle-orm 0.45.4.
+- Entwicklungswerkzeuge: vitest, vite, postcss, Playwright und die
+  shadcn-CLI aktualisiert, transitive Pakete per `pnpm.overrides` angehoben.
+  Übrig bleibt ein mittlerer Fund in einem alten esbuild, das drizzle-kit
+  intern mitbringt - nur beim Entwickeln, nicht im Image.
+
+### Hinzugefügt
+
+- **Designauswahl** unter Konto → Design: Klemmbaustein (neuer Standard),
+  Warm, Nachtblau (dunkel), Bonbon, Bauklotz und Schlicht (der bisherige
+  Look). Die Wahl gilt pro Gerät und wirkt sofort.
+- **Platzhalter für Sets ohne Bild**: Farbe des Herstellers, gezeichneter
+  Stein und Setnummer statt eines grauen „Bild fehlt".
+- **Startseite als Überblick**: Steinreihe für den Fortschritt (bei mehreren
+  Sammlern in deren Farben), Teile, Wert, nächster Wunschlisten-Termin mit
+  Countdown und Abkürzungen.
+- Neues Logo als Baustein, Schriften lokal gebündelt (kein CDN).
+
+### Geändert
+
+- Karten, Buttons und Badges tragen im Standard-Design Konturen, eine feste
+  Unterkante und Noppen. In der Sammlung und auf der öffentlichen
+  Wunschliste zeigen die Noppen den Sammler bzw. ob ein Wunsch reserviert ist.
+- Die öffentliche Wunschliste hat einen farbigen Kopf mit Anlass und Datum.
+- Screenshots der Anleitung zeigen die feste Navigation nicht mehr mitten
+  im Bild.
+
 ## [0.3.0] - 2026-09-07

 Phase 3: mehrere Kinder, Wertentwicklung, Erinnerungen und ein Schutz vor
@@ -194,7 +249,8 @@ Erste lauffaehige Fassung: Phase 1 vollstaendig, im Docker-Stack verifiziert.
 - Unter Windows scheitert `pnpm build` an fehlenden Symlink-Rechten. Der
  Docker-Build unter Linux ist davon nicht betroffen.

-[Unreleased]: https://git.wilde-server.de/florian.wilde/bricktrack/compare/v0.3.0...HEAD
+[Unreleased]: https://git.wilde-server.de/florian.wilde/bricktrack/compare/v0.4.0...HEAD
+[0.4.0]: https://git.wilde-server.de/florian.wilde/bricktrack/releases/tag/v0.4.0
 [0.3.0]: https://git.wilde-server.de/florian.wilde/bricktrack/releases/tag/v0.3.0
 [0.2.0]: https://git.wilde-server.de/florian.wilde/bricktrack/releases/tag/v0.2.0
 [0.1.0]: https://git.wilde-server.de/florian.wilde/bricktrack/releases/tag/v0.1.0
@@ -63,6 +63,18 @@ Bild-URLs, die der Nutzer selbst hinterlegt hat.
 | `src/lib/reminder-job.ts`, `src/lib/mailer.ts` | Versand und Zeitplan |
 | `src/lib/export.ts` | Export und Import des gesamten Bestands |
 | `src/lib/money.ts`, `src/lib/format.ts` | Cent-Umrechnung, dd.MM.yyyy |
+| `src/lib/link-import.ts` | Set-Daten aus Link und Seite lesen (rein, testbar) |
+| `src/lib/safe-fetch.ts`, `src/lib/net-guard.ts` | Abruf fremder URLs nur an oeffentliche Adressen |
+| `src/lib/design.ts`, `src/app/designs.css` | Designs: Namen und Cookie bzw. Tokens je `data-design` |
+| `src/components/brick/` | Noppen, Logo, Platzhalter fuer Sets ohne Bild |
+
+### Designs
+
+Das Design steht als `data-design` am `<html>` (Cookie `bricktrack-design`,
+pro Geraet, Standard `klemmbaustein`). Komponenten benutzen nur Tokens
+(`bg-primary`, `border-edge`, `--edge-w`, `--lift`, `bg-tone-1` ...), nie feste
+Farben - sonst stimmt ein Design nicht mehr. Karten mit Noppen: `<Studs />`
+neben die Karte in einen `relative`-Wrapper, die Karte selbst mit `brick`.

 ## Befehle

@@ -185,7 +197,9 @@ Session.
   nichts preis ausser den Wunschlisten-Daten - keine Nutzernamen,
   keine Sammlungsdaten, keine IDs anderer Objekte.
 4. Externe API-Aufrufe (Rebrickable, ab Phase 2) laufen ausschliesslich
-   serverseitig.
+   serverseitig. URLs, die ein Nutzer eingibt (Link-Import, Bild-Uebernahme),
+   werden nur ueber `safeFetch` abgerufen - nie mit `fetch` direkt, sonst
+   erreicht der Server auch Geraete im Heimnetz.
 5. Session-Cookies: `httpOnly`, `secure`, `sameSite=lax`.
   Rate-Limiting auf den Login-Endpunkten.
 6. Der Export enthaelt **keine** Konten, Passwoerter oder Passkeys - und
@@ -203,6 +217,8 @@ Session.
  Einladungen, Export/Import, PWA. *Fertig in 0.2.0.*
 - **Phase 3 (Nice to have)** - mehrere Sammler, Preisbeobachtung,
  E-Mail-Erinnerungen, Dublettenpruefung. *Fertig in 0.3.0.*
+- **Design und Sicherheit** - Designauswahl (Standard Klemmbaustein),
+  Abhaengigkeiten ohne bekannte Luecken. *Fertig in 0.4.0.*

 Details und Stand: `docs/ROADMAP.md`. Zeitaufwaende: `docs/DEVLOG.md`.

@@ -32,6 +32,7 @@ Kinderzimmer, nicht für den Schreibtisch.
 18. [Erinnerung vor dem Termin](#18-erinnerungen)
 19. [Schutz vor doppelten Einträgen](#19-dubletten)
 20. [Antworten auf die zwei wichtigen Fragen](#20-die-zwei-fragen)
+21. [Ein anderes Design](#21-design)

 ---

@@ -52,17 +53,20 @@ gleich danach unter „Konto" (siehe [Abschnitt 10](#10-passkeys-einrichten)).

 ![Startseite](bilder/02-start.png)

-Die Startseite ist die Abzweigung zu den vier Bereichen:
+Die Startseite zeigt auf einen Blick, wo die Sammlung steht:

 | | |
 |---|---|
-| **Katalog** | Alle bekannten Sets – egal ob vorhanden oder nicht |
-| **Fehlende Sets** | Der direkte Weg zu allem, was noch fehlt |
-| **Sammlung** | Was tatsächlich da ist |
-| **Wunschlisten** | Zum Teilen mit Familie und Freunden |
+| **Steinreihe** | Zehn Plätze für den ganzen Katalog. Jeder volle Stein ist ein Zehntel, das schon da ist – bei mehreren Kindern in deren Farbe |
+| **Teile und Wert** | Alle verbauten Teile und was die Sammlung heute wert ist |
+| **Nächster Termin** | Die nächste Wunschliste mit Datum, wie viele Tage noch bleiben und wie viel offen ist |
+| **Abkürzungen** | Direkt zu den fehlenden Sets, zu den Wunschlisten oder zu einem neuen Set |

 Unten am Bildschirmrand liegt die Navigation – auf dem Handy mit dem Daumen
-erreichbar.
+erreichbar. Der aktive Bereich sitzt auf einer kleinen Platte.
+
+Sets ohne Bild bekommen einen farbigen Platzhalter mit der Setnummer. Jeder
+Hersteller hat seine eigene Farbe – Lego gelb, Playmobil blau, Cobi grün.

 ---

@@ -302,8 +306,35 @@ gib ihnen sprechende Namen.

 ## 11. Import und Scanner

-Sets von Hand einzutippen ist der langsame Weg. Für Lego gibt es zwei
-schnellere.
+Sets von Hand einzutippen ist der langsame Weg. Es gibt drei schnellere.
+
+### Aus einem Link übernehmen – für alle Hersteller
+
+Auf **Katalog → Set anlegen** steht das Feld „Aus einem Link übernehmen".
+Dort passt jeder Link zu einem Set hinein: Amazon, idealo, geizhals, der Shop
+des Herstellers oder eine Set-Datenbank wie
+[Brickfact](https://brickfact.com) (Lego) und
+[Merlins Bricks](https://www.merlinsbricks.com) (BlueBrixx, Cobi und viele
+mehr). „Übernehmen" füllt das Formular darunter aus – **gespeichert wird erst,
+wenn du „Set anlegen" drückst**. Ein Blick auf Name und Nummer lohnt sich,
+denn Shops schreiben gern das halbe Sortiment in den Titel.
+
+Was dabei passiert:
+
+1. Bricktrack liest die Seite und übernimmt Name, Setnummer, EAN, Bild,
+   Teile und Jahr, soweit sie dort stehen.
+2. Manche Shops lassen sich nicht abfragen. Dann reicht oft schon der Link
+   selbst: In `amazon.de/LEGO-60398-Familienhaus-…` stecken Hersteller,
+   Nummer und Name.
+3. Mit Hersteller und Nummer ergänzt Bricktrack den Rest: Lego über
+   Rebrickable (mit API-Key), BlueBrixx und Cobi über Merlins Bricks.
+
+Das Bild wird beim Speichern lokal abgelegt, die Quelle steht in den Notizen.
+Gibt es den Hersteller noch nicht, wird er angelegt. Steht das Set schon im
+Katalog, kommt statt des Formulars ein Link zum vorhandenen Eintrag.
+
+> Bricktrack ruft dafür nur öffentliche Adressen ab. Links ins eigene Netz –
+> Router, NAS, andere Container – werden abgewiesen.

 ### Lego-Import über die Setnummer

@@ -548,6 +579,27 @@ Haken dran, habt ihr es schon.

 ---

+## 21. Design
+
+![Startseite im Design Nachtblau](bilder/25-design-nachtblau.png)
+
+Unter **Konto → Design** gibt es sechs Looks zur Auswahl:
+
+| Design | |
+|---|---|
+| **Klemmbaustein** | Der Standard: Karten mit Noppen, dunkle Konturen, kräftige Steinfarben |
+| **Warm** | Ruhiger Sandton mit Ziegelrot |
+| **Nachtblau** | Dunkel mit gelbem Akzent – angenehm am Abend |
+| **Bonbon** | Weiches Lila mit Pastellfarben |
+| **Bauklotz** | Primärfarben und dicke schwarze Konturen |
+| **Schlicht** | Neutrales Grau, so wie Bricktrack bis Version 0.3 aussah |
+
+Die Auswahl wirkt sofort und gilt **für das Gerät**, nicht für das Konto: Das
+Tablet im Kinderzimmer kann bunt sein, während das Handy dunkel bleibt.
+Öffentliche Wunschlisten sehen Gäste immer im Standard-Design.
+
+---
+
 ## Kleinigkeiten, die den Alltag leichter machen

 - **Filter stecken in der URL.** Ein Lesezeichen auf
@@ -59,6 +59,16 @@ Laeuft vollstaendig im Docker-Stack.
      rueckt und Eintraege unreserviert sind
 - [x] Dublettenpruefung beim Anlegen von Sets

+## Design und Sicherheit (v0.4.0, abgeschlossen am 25.10.2026)
+
+- [x] Abhängigkeiten mit bekannten Sicherheitslücken aktualisiert
+
+- [x] Designauswahl pro Gerät, sechs Designs, Standard „Klemmbaustein"
+- [x] Platzhalter für Sets ohne Bild, neues Logo, Schriften lokal
+- [x] Startseite als Überblick mit Steinreihe und nächstem Termin
+- [ ] Filter im Katalog als Reiter statt Auswahlfelder
+- [ ] Scan-Button mittig in der unteren Navigation
+
 ## Danach

 Phase 1 bis 3 sind umgesetzt. Was noch offen ist, steht hier - ohne Termin
@@ -19,6 +19,9 @@ function shotPath(name: string) {
 async function shoot(page: Page, name: string) {
  // Let fonts and images settle so the picture is not half-rendered.
  await page.waitForLoadState('networkidle');
+  // A fixed bottom bar would be painted where the first viewport ends, in the
+  // middle of a full-page picture. In flow it lands at the end, where it belongs.
+  await page.addStyleTag({ content: '.fixed.bottom-0 { position: static !important; }' });
  await page.screenshot({ path: shotPath(name), fullPage: true });
 }

@@ -117,6 +120,8 @@ test('Screenshots fuer die Anleitung', async ({ page, browser }) => {
  await visitor.getByRole('button', { name: 'Reservieren' }).click();
  await expect(visitor.getByText('Reservierung gespeichert')).toBeVisible();
  await visitor.getByRole('button', { name: 'Alles klar' }).click();
+  // Otherwise the picture catches the dialog halfway through fading out.
+  await expect(visitor.getByRole('dialog')).toBeHidden();
  await shoot(visitor, '14-reserviert');
  await visitorContext.close();

@@ -129,6 +134,18 @@ test('Screenshots fuer die Anleitung', async ({ page, browser }) => {
  await expect(page.getByText('Passkeys', { exact: true })).toBeVisible();
  await shoot(page, '16-konto-passkeys');

+  // The same start page in the dark design, then back to the default.
+  await page.getByText('Nachtblau').click();
+  await expect(page.locator('html')).toHaveAttribute('data-design', 'nacht');
+  // The look switches at once; the cookie follows with the server action.
+  await page.waitForLoadState('networkidle');
+  await visit(page, '/');
+  await expect(page.locator('html')).toHaveAttribute('data-design', 'nacht');
+  await shoot(page, '25-design-nachtblau');
+  await visit(page, '/konto');
+  await page.getByText('Klemmbaustein').click();
+  await expect(page.locator('html')).toHaveAttribute('data-design', 'klemmbaustein');
+
  // --- 12. Lego import ------------------------------------------------------
  // The screenshot container runs with a placeholder API key so the manual
  // shows the form, not the "not configured" hint. Nothing is submitted.
@@ -1,6 +1,6 @@
 {
  "name": "bricktrack",
-  "version": "0.1.0",
+  "version": "0.4.0",
  "private": true,
  "description": "Self-hosted Verwaltung fuer Spielzeug-Set-Sammlungen (Lego, Playmobil, Cobi, ...)",
  "packageManager": "pnpm@10.34.5",
@@ -23,33 +23,39 @@
    "screenshots": "node scripts/screenshots-prepare.mjs && playwright test --config=playwright.screenshots.config.ts"
  },
  "dependencies": {
-    "@better-auth/passkey": "^1.7.3",
+    "@better-auth/passkey": "^1.7.12",
+    "@fontsource-variable/archivo": "^5.3.0",
+    "@fontsource-variable/bricolage-grotesque": "^5.3.0",
+    "@fontsource-variable/fredoka": "^5.3.0",
+    "@fontsource-variable/inter": "^5.3.0",
+    "@fontsource-variable/nunito": "^5.3.0",
+    "@fontsource-variable/outfit": "^5.3.0",
    "@zxing/browser": "^0.2.1",
    "@zxing/library": "^0.23.0",
-    "better-auth": "^1.7.3",
+    "better-auth": "^1.7.12",
    "better-sqlite3": "^13.0.3",
    "class-variance-authority": "^0.7.1",
    "cn": "^0.2.6",
    "date-fns": "^4.4.0",
-    "drizzle-orm": "^0.45.2",
+    "drizzle-orm": "^0.45.4",
    "fflate": "^0.8.3",
    "lucide-react": "^1.41.0",
-    "next": "15.5.25",
+    "next": "15.5.28",
    "next-themes": "^0.4.6",
-    "nodemailer": "^10.0.0",
+    "nodemailer": "^10.2.1",
    "pdfjs-dist": "^6.3.289",
    "radix-ui": "^1.6.7",
    "react": "19.1.0",
    "react-dom": "19.1.0",
    "server-only": "^0.0.1",
-    "sharp": "^0.35.4",
+    "sharp": "^0.35.5",
    "sonner": "^2.0.8",
    "tw-animate-css": "^1.4.0",
-    "zod": "^4.5.4"
+    "zod": "^4.6.7"
  },
  "devDependencies": {
    "@eslint/eslintrc": "^3",
-    "@playwright/test": "^1.63.0",
+    "@playwright/test": "^1.64.1",
    "@tailwindcss/postcss": "^4",
    "@types/better-sqlite3": "^9.6.0",
    "@types/node": "^20",
@@ -57,15 +63,16 @@
    "@types/react": "^19",
    "@types/react-dom": "^19",
    "dotenv": "^17.4.2",
-    "drizzle-kit": "^0.31.10",
+    "drizzle-kit": "^0.31.11",
    "esbuild": "^0.25.12",
    "eslint": "^9",
-    "eslint-config-next": "15.5.25",
-    "shadcn": "^4.21.0",
+    "eslint-config-next": "15.5.28",
+    "shadcn": "^4.22.1",
    "tailwindcss": "^4",
-    "tsx": "^4.23.13",
+    "tsx": "^4.23.15",
    "typescript": "^5",
-    "vitest": "^5.0.0"
+    "vite": "^8.3.5",
+    "vitest": "^5.0.5"
  },
  "pnpm": {
    "onlyBuiltDependencies": [
@@ -73,6 +80,20 @@
      "esbuild",
      "sharp",
      "unrs-resolver"
-    ]
+    ],
+    "overrides": {
+      "postcss": "^8.5.31",
+      "vite": "^8.2.4",
+      "source-map-js": "^1.2.2",
+      "brace-expansion@<2": "^1.1.21",
+      "brace-expansion@>=4 <6": "^5.0.12",
+      "@modelcontextprotocol/sdk": "^1.32.2",
+      "undici@7": "^7.30.1",
+      "proxy-addr": "^2.0.8",
+      "body-parser@2": "^2.4.0",
+      "fast-uri@3": "^3.1.9",
+      "hono": "^4.13.11",
+      "ip-address": "^10.7.4"
+    }
  }
 }
@@ -1,7 +1,9 @@
 import type { Metadata } from 'next';
 import Link from 'next/link';
 import { notFound } from 'next/navigation';
-import { Check, ExternalLink, Gift, ImageOff, Pencil } from 'lucide-react';
+import { Check, ExternalLink, Gift, Pencil } from 'lucide-react';
+import { SetPlaceholder } from '@/components/brick/set-placeholder';
+import { Studs } from '@/components/brick/studs';
 import { InstructionsSection } from '@/components/katalog/instructions-section';
 import { PhotosSection } from '@/components/katalog/photos-section';
 import { PriceSection } from '@/components/katalog/price-section';
@@ -114,15 +116,21 @@ export default async function SetDetailPage({ params, searchParams }: Props) {
      </div>

      <div className="grid gap-6 md:grid-cols-[minmax(0,320px)_1fr]">
-        <div className="overflow-hidden rounded-xl border border-border bg-muted">
-          {image ? (
-            // eslint-disable-next-line @next/next/no-img-element
-            <img src={image} alt="" className="aspect-square w-full object-contain p-3" />
-          ) : (
-            <div className="flex aspect-square items-center justify-center text-muted-foreground">
-              <ImageOff className="size-10" aria-hidden />
-            </div>
-          )}
+        <div className="relative self-start">
+          <Studs count={4} />
+          <div className="brick overflow-hidden rounded-xl bg-muted">
+            {image ? (
+              // eslint-disable-next-line @next/next/no-img-element
+              <img src={image} alt="" className="aspect-square w-full object-contain p-3" />
+            ) : (
+              <SetPlaceholder
+                setNumber={set.setNumber}
+                manufacturerName={set.manufacturerName}
+                size="lg"
+                className="aspect-square"
+              />
+            )}
+          </div>
        </div>

        <div className="space-y-4">
@@ -5,8 +5,10 @@ import { and, eq, ne } from 'drizzle-orm';
 import { db } from '@/db';
 import { instruction, photo, set } from '@/db/schema';
 import { actionData, actionError, actionOk, formToObject, parseForm, type ActionResult } from '@/lib/action-result';
+import { env } from '@/env';
+import { safeFetch, SafeFetchError } from '@/lib/safe-fetch';
 import { requireUser } from '@/lib/session';
-import { deleteStoredFile, storeImage, storePdf, UploadError } from '@/lib/uploads';
+import { deleteStoredFile, storeImage, storeImageBytes, storePdf, UploadError } from '@/lib/uploads';
 import { optionalText, optionalUrl, setSchema } from '@/lib/validation';
 import { z } from 'zod';

@@ -20,6 +22,23 @@ function revalidateSet(id?: string) {
  if (id) revalidatePath(`/katalog/${id}`);
 }

+async function cacheRemoteImage(url: string, setId: string): Promise<string | null> {
+  try {
+    const response = await safeFetch(url, {
+      accept: 'image/webp,image/png,image/jpeg;q=0.9,*/*;q=0.5',
+      maxBytes: env.MAX_UPLOAD_BYTES,
+    });
+    if (response.status !== 200) return null;
+    return (await storeImageBytes(response.body, 'set-image', setId)).filePath;
+  } catch (error) {
+    if (error instanceof SafeFetchError || error instanceof UploadError) {
+      console.error('[katalog] Bild konnte nicht übernommen werden', url, error.message);
+      return null;
+    }
+    throw error;
+  }
+}
+
 function fileFrom(formData: FormData, field: string): File | null {
  const value = formData.get(field);
  return value instanceof File && value.size > 0 ? value : null;
@@ -60,12 +79,17 @@ export async function createSet(formData: FormData): Promise<ActionResult<{ id:
      if (error instanceof UploadError) return actionError(error.message);
      throw error;
    }
+  } else if (formData.get('cacheImage') === 'on' && parsed.data.imageUrl) {
+    // A picture found by the link import is kept locally, like the Lego
+    // import does. If that fails, the URL stays as the fallback.
+    imagePath = await cacheRemoteImage(parsed.data.imageUrl, id);
  }

  db.insert(set)
    .values({
      id,
      ...parsed.data,
+      imageUrl: imagePath ? null : parsed.data.imageUrl,
      imagePath,
      createdAt: now(),
      updatedAt: now(),
@@ -0,0 +1,225 @@
+'use server';
+
+import { and, eq } from 'drizzle-orm';
+import { z } from 'zod';
+import { db } from '@/db';
+import { manufacturer, set } from '@/db/schema';
+import { actionData, actionError, type ActionResult } from '@/lib/action-result';
+import {
+  cleanSetName,
+  hintsFromHtml,
+  hintsFromUrl,
+  mergeHints,
+  sourceLabel,
+  type LinkHints,
+} from '@/lib/link-import';
+import { fetchMinifigCount, fetchSet, isRebrickableEnabled, RebrickableError } from '@/lib/rebrickable';
+import { safeFetch, SafeFetchError } from '@/lib/safe-fetch';
+import { requireUser } from '@/lib/session';
+import { uniqueSlug } from '@/lib/slug';
+
+/**
+ * "Aus einem Link übernehmen": reads a set out of a shop, price-comparison or
+ * database link and returns a draft for the form. Nothing is saved here except
+ * a missing manufacturer - the form needs it to be selectable.
+ *
+ * Amazon, idealo and geizhals usually refuse requests from a server; then the
+ * link itself (brand, number, words in the address) is the starting point,
+ * and Rebrickable (Lego) or Merlins Bricks (BlueBrixx, Cobi) fill in the rest.
+ */
+
+export type LinkPreview = {
+  manufacturerId: string | null;
+  manufacturerName: string | null;
+  setNumber: string;
+  name: string;
+  year: number | null;
+  pieceCount: number | null;
+  minifigCount: number | null;
+  ean: string;
+  imageUrl: string;
+  sourceUrl: string;
+  /** Where the data came from, for the confirmation message. */
+  sources: string[];
+  /** The shop did not let us read the page; only the address was used. */
+  pageBlocked: boolean;
+  /** The set is already in the catalog. */
+  existingSetId: string | null;
+};
+
+const inputSchema = z.object({
+  url: z
+    .string()
+    .trim()
+    .min(1, 'Bitte einen Link einfügen.')
+    .max(2000, 'Der Link ist zu lang.')
+    .url('Das ist kein gültiger Link.')
+    .refine((value) => /^https?:\/\//i.test(value), 'Nur http- und https-Links.'),
+});
+
+/** Manufacturer website for the ones we create on the fly. */
+const WEBSITES: Record<string, string> = {
+  Lego: 'https://www.lego.com/de-de',
+  Playmobil: 'https://www.playmobil.de',
+  Cobi: 'https://cobi.pl',
+  BlueBrixx: 'https://www.bluebrixx.com',
+  'Mega Bloks': 'https://www.megabrands.com',
+};
+
+/** Merlins Bricks keys its set pages by a brand prefix. */
+const MERLIN_PREFIX: Record<string, string> = { BlueBrixx: 'bb', Cobi: 'cobi' };
+
+function key(value: string): string {
+  return value.toLowerCase().replace(/[^a-z0-9]/g, '');
+}
+
+function ensureManufacturer(name: string): string {
+  const rows = db
+    .select({ id: manufacturer.id, name: manufacturer.name, slug: manufacturer.slug })
+    .from(manufacturer)
+    .all();
+
+  const match = rows.find((row) => key(row.name) === key(name) || row.slug === key(name));
+  if (match) return match.id;
+
+  const id = crypto.randomUUID();
+  const now = new Date();
+  db.insert(manufacturer)
+    .values({
+      id,
+      name,
+      slug: uniqueSlug(name, rows.map((row) => row.slug)),
+      website: WEBSITES[name] ?? null,
+      createdAt: now,
+      updatedAt: now,
+    })
+    .run();
+  return id;
+}
+
+async function readPage(url: URL): Promise<{ hints: LinkHints | null; finalUrl: URL; blocked: boolean }> {
+  const response = await safeFetch(url);
+  const finalUrl = new URL(response.url);
+  const isHtml = /html|xml/i.test(response.contentType);
+
+  if (response.status !== 200 || !isHtml) return { hints: null, finalUrl, blocked: true };
+  return { hints: hintsFromHtml(response.body.toString('utf8'), finalUrl), finalUrl, blocked: false };
+}
+
+async function fromRebrickable(setNumber: string): Promise<(LinkHints & { minifigCount?: number }) | null> {
+  if (!isRebrickableEnabled()) return null;
+  try {
+    const remote = await fetchSet(setNumber);
+    if (!remote) return null;
+    const minifigs = await fetchMinifigCount(remote.setNumber);
+    return {
+      name: remote.name,
+      year: remote.year ?? undefined,
+      pieceCount: remote.pieceCount ?? undefined,
+      imageUrl: remote.imageUrl ?? undefined,
+      minifigCount: minifigs ?? undefined,
+    };
+  } catch (error) {
+    if (error instanceof RebrickableError) return null;
+    throw error;
+  }
+}
+
+async function fromMerlinsBricks(brand: string, setNumber: string): Promise<LinkHints | null> {
+  const prefix = MERLIN_PREFIX[brand];
+  if (!prefix || !/^[\w-]+$/.test(setNumber)) return null;
+  try {
+    const page = await readPage(new URL(`https://www.merlinsbricks.com/sets/${prefix}-${setNumber}/`));
+    return page.hints;
+  } catch {
+    return null;
+  }
+}
+
+export async function previewSetFromLink(input: unknown): Promise<ActionResult<LinkPreview>> {
+  await requireUser();
+
+  const parsed = inputSchema.safeParse(input);
+  if (!parsed.success) return actionError(parsed.error.issues[0]?.message ?? 'Ungültiger Link.');
+
+  const url = new URL(parsed.data.url);
+  const sources: string[] = [];
+
+  // 1. The page itself, if it lets us in. A short link (amzn.eu/...) still
+  //    tells us where it leads, even when the target then refuses.
+  let pageHints: LinkHints | null = null;
+  let finalUrl = url;
+  let pageBlocked = true;
+  try {
+    const page = await readPage(url);
+    pageHints = page.hints;
+    finalUrl = page.finalUrl;
+    pageBlocked = page.blocked;
+  } catch (error) {
+    if (!(error instanceof SafeFetchError)) throw error;
+    if (/intern/i.test(error.message)) return actionError(error.message);
+  }
+  if (pageHints) sources.push(sourceLabel(finalUrl));
+
+  // 2. The address.
+  const addressHints = mergeHints(hintsFromUrl(finalUrl), hintsFromUrl(url));
+  if (!pageHints || pageBlocked) sources.push(`Link (${sourceLabel(finalUrl)})`);
+
+  let hints = mergeHints(pageHints, addressHints);
+  let minifigCount: number | null = null;
+
+  // 3. A set database for the brand.
+  if (hints.manufacturer === 'Lego' && hints.setNumber) {
+    const remote = await fromRebrickable(hints.setNumber);
+    if (remote) {
+      // The shop's German name beats Rebrickable's English one; Rebrickable's
+      // facts and clean picture beat the shop's.
+      hints = mergeHints({ name: pageHints?.name ?? addressHints.name, ean: hints.ean }, remote, hints);
+      minifigCount = remote.minifigCount ?? null;
+      sources.push('Rebrickable');
+    }
+  } else if (hints.manufacturer && hints.setNumber && !/merlinsbricks\./.test(finalUrl.hostname)) {
+    const merlin = await fromMerlinsBricks(hints.manufacturer, hints.setNumber);
+    if (merlin) {
+      hints = mergeHints(hints, merlin);
+      sources.push('Merlins Bricks');
+    }
+  }
+
+  if (!hints.name && !hints.setNumber) {
+    return actionError(
+      pageBlocked
+        ? `${sourceLabel(finalUrl)} lässt keine Abfrage zu, und der Link selbst verrät nichts über das Set. Versuch es mit einem anderen Link oder trag das Set von Hand ein.`
+        : 'Auf der Seite stehen keine Produktdaten, mit denen sich etwas anfangen lässt.',
+    );
+  }
+
+  const manufacturerName = hints.manufacturer ?? null;
+  const manufacturerId = manufacturerName ? ensureManufacturer(manufacturerName) : null;
+  const setNumber = hints.setNumber ?? '';
+
+  const existing =
+    manufacturerId && setNumber
+      ? db
+          .select({ id: set.id })
+          .from(set)
+          .where(and(eq(set.manufacturerId, manufacturerId), eq(set.setNumber, setNumber)))
+          .get()
+      : undefined;
+
+  return actionData({
+    manufacturerId,
+    manufacturerName,
+    setNumber,
+    name: hints.name ? cleanSetName(hints.name, manufacturerName ?? undefined, setNumber) : '',
+    year: hints.year ?? null,
+    pieceCount: hints.pieceCount ?? null,
+    minifigCount,
+    ean: hints.ean ?? '',
+    imageUrl: hints.imageUrl ?? '',
+    sourceUrl: url.toString(),
+    sources,
+    pageBlocked,
+    existingSetId: existing?.id ?? null,
+  });
+}
@@ -1,7 +1,7 @@
 import type { Metadata } from 'next';
 import Link from 'next/link';
+import { NewSetEntry } from '@/components/katalog/link-import';
 import { RebrickableImport } from '@/components/katalog/rebrickable-import';
-import { SetForm } from '@/components/katalog/set-form';
 import { Button } from '@/components/ui/button';
 import { listManufacturers, listThemes } from '@/lib/queries/master-data';
 import { isRebrickableEnabled } from '@/lib/rebrickable';
@@ -25,26 +25,8 @@ export default async function NeuesSetPage({ searchParams }: { searchParams: Sea

  const importEnabled = isRebrickableEnabled();

-  if (manufacturers.length === 0) {
-    return (
-      <div className="space-y-6">
-        <h1 className="text-2xl font-semibold tracking-tight">Neues Set</h1>
-
-        {/* The Lego import creates its manufacturer itself, so it works even
-            on a completely empty instance. */}
-        <RebrickableImport enabled={importEnabled} />
-
-        <p className="rounded-lg border border-dashed border-border p-6 text-sm text-muted-foreground">
-          Für ein Set von Hand brauchst du zuerst einen Hersteller – Lego, Playmobil, Cobi oder
-          was auch immer im Kinderzimmer steht.
-        </p>
-        <Button asChild size="lg">
-          <Link href="/verwaltung/hersteller">Hersteller anlegen</Link>
-        </Button>
-      </div>
-    );
-  }
-
+  // One layout for both cases: the link import may create the first
+  // manufacturer, and its draft must survive the refresh that follows.
  return (
    <div className="space-y-6">
      <div>
@@ -54,15 +36,19 @@ export default async function NeuesSetPage({ searchParams }: { searchParams: Sea
          Sammlung hinzufügen“ fest.
        </p>
      </div>
+      {/* The Lego import creates its manufacturer itself, so it works even
+          on a completely empty instance. */}
      <RebrickableImport enabled={importEnabled} />

-      <div className="flex items-center gap-3 text-xs text-muted-foreground">
-        <span className="h-px flex-1 bg-border" />
-        oder von Hand
-        <span className="h-px flex-1 bg-border" />
-      </div>
-
-      <SetForm manufacturers={manufacturers} themes={themes} defaultEan={ean} />
+      <NewSetEntry manufacturers={manufacturers} themes={themes} defaultEan={ean}>
+        <p className="rounded-lg border border-dashed border-border p-6 text-sm text-muted-foreground">
+          Für ein Set von Hand brauchst du zuerst einen Hersteller – Lego, Playmobil, Cobi oder
+          was auch immer im Kinderzimmer steht.
+        </p>
+        <Button asChild size="lg">
+          <Link href="/verwaltung/hersteller">Hersteller anlegen</Link>
+        </Button>
+      </NewSetEntry>
    </div>
  );
 }
@@ -1,12 +1,16 @@
 'use server';

 import { revalidatePath } from 'next/cache';
-import { headers } from 'next/headers';
+import { cookies, headers } from 'next/headers';
 import { z } from 'zod';
+import { env } from '@/env';
 import { auth } from '@/lib/auth';
+import { DESIGN_COOKIE, DESIGNS } from '@/lib/design';
+import { requireUser } from '@/lib/session';

 const idSchema = z.object({ id: z.string().min(1) });
 const renameSchema = idSchema.extend({ name: z.string().trim().min(1).max(60) });
+const designSchema = z.object({ design: z.enum(DESIGNS) });

 export type ActionResult = { ok: true } | { ok: false; error: string };

@@ -43,3 +47,26 @@ export async function renamePasskeyAction(input: unknown): Promise<ActionResult>
  revalidatePath('/konto');
  return { ok: true };
 }
+
+/**
+ * The design is a per-device choice: a cookie, not a column on the user. That
+ * way it also covers the login page and lets two children's tablets look
+ * different.
+ */
+export async function setDesignAction(input: unknown): Promise<ActionResult> {
+  await requireUser();
+
+  const parsed = designSchema.safeParse(input);
+  if (!parsed.success) return { ok: false, error: 'Unbekanntes Design.' };
+
+  (await cookies()).set(DESIGN_COOKIE, parsed.data.design, {
+    httpOnly: true,
+    secure: env.isProduction,
+    sameSite: 'lax',
+    path: '/',
+    maxAge: 60 * 60 * 24 * 365,
+  });
+
+  revalidatePath('/', 'layout');
+  return { ok: true };
+}
@@ -1,9 +1,11 @@
 import type { Metadata } from 'next';
-import { headers } from 'next/headers';
+import { cookies, headers } from 'next/headers';
 import { PasskeyManager, type PasskeyRow } from '@/components/auth/passkey-manager';
+import { DesignPicker } from '@/components/konto/design-picker';
 import { Badge } from '@/components/ui/badge';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { auth } from '@/lib/auth';
+import { DESIGN_COOKIE, resolveDesign } from '@/lib/design';
 import { requireUser } from '@/lib/session';

 export const metadata: Metadata = { title: 'Konto' };
@@ -17,6 +19,7 @@ export default async function AccountPage() {
    name: passkey.name ?? null,
    createdAt: passkey.createdAt ? new Date(passkey.createdAt) : null,
  }));
+  const design = resolveDesign((await cookies()).get(DESIGN_COOKIE)?.value);

  return (
    <div className="space-y-6">
@@ -45,6 +48,18 @@ export default async function AccountPage() {
        </CardContent>
      </Card>

+      <Card>
+        <CardHeader>
+          <CardTitle>Design</CardTitle>
+          <CardDescription>
+            Gilt für dieses Gerät. Öffentliche Wunschlisten sehen Gäste im Standard-Design.
+          </CardDescription>
+        </CardHeader>
+        <CardContent>
+          <DesignPicker current={design} />
+        </CardContent>
+      </Card>
+
      <Card>
        <CardHeader>
          <CardTitle>Passkeys</CardTitle>
@@ -1,58 +1,186 @@
 import Link from 'next/link';
-import { Boxes, Gift, LayoutGrid, PackageSearch } from 'lucide-react';
-import { Card, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { ChevronRight, Gift, PackageSearch, Plus } from 'lucide-react';
+import { cn } from 'cn';
+import { Studs } from '@/components/brick/studs';
+import { Button } from '@/components/ui/button';
+import { brickRow } from '@/lib/brick-row';
+import { collectorDotClass } from '@/lib/collector-colors';
+import { formatDate, formatNumber, pluralize } from '@/lib/format';
+import { formatEuro } from '@/lib/money';
+import { countMissingSets, getCollectionStats } from '@/lib/queries/collection';
+import { countItemsPerCollector, listCollectors } from '@/lib/queries/collectors';
+import { listWishlists } from '@/lib/queries/wishlists';
+import { daysUntil } from '@/lib/reminders';
 import { requireUser } from '@/lib/session';

-const shortcuts = [
-  {
-    href: '/katalog',
-    icon: LayoutGrid,
-    title: 'Katalog',
-    description: 'Alle bekannten Sets durchsuchen und neue anlegen.',
-  },
-  {
-    href: '/katalog?besitz=fehlt',
-    icon: PackageSearch,
-    title: 'Fehlende Sets',
-    description: 'Was noch nicht in der Sammlung ist – direkt auf die Wunschliste.',
-  },
-  {
-    href: '/sammlung',
-    icon: Boxes,
-    title: 'Sammlung',
-    description: 'Alles, was tatsächlich da ist – mit Standort und Zustand.',
-  },
-  {
-    href: '/wunschlisten',
-    icon: Gift,
-    title: 'Wunschlisten',
-    description: 'Listen anlegen und per Link mit Familie und Freunden teilen.',
-  },
-] as const;
+function daysLabel(days: number): string {
+  if (days === 0) return 'heute';
+  if (days === 1) return 'morgen';
+  return `in ${days} Tagen`;
+}

 export default async function DashboardPage() {
  const user = await requireUser();

-  return (
-    <div className="space-y-6">
-      <div>
-        <h1 className="text-2xl font-semibold tracking-tight">Hallo {user.name}</h1>
-        <p className="text-sm text-muted-foreground">Was möchtest du tun?</p>
-      </div>
+  const stats = getCollectionStats();
+  const missing = countMissingSets();
+  const totalSets = stats.setCount + missing;

-      <div className="grid gap-3 sm:grid-cols-2">
-        {shortcuts.map((shortcut) => (
-          <Link key={shortcut.href} href={shortcut.href} className="group">
-            <Card className="h-full transition-colors group-hover:border-primary/40">
-              <CardHeader>
-                <shortcut.icon className="size-6 text-primary" aria-hidden />
-                <CardTitle>{shortcut.title}</CardTitle>
-                <CardDescription>{shortcut.description}</CardDescription>
-              </CardHeader>
-            </Card>
+  const collectors = listCollectors();
+  const perCollector = countItemsPerCollector();
+  const showCollectors = collectors.length > 1;
+  const bricks = brickRow(
+    stats.setCount,
+    totalSets,
+    showCollectors
+      ? collectors.map((entry) => ({ key: entry.id, count: perCollector.get(entry.id) ?? 0 }))
+      : [],
+  );
+  const colorById = new Map(collectors.map((entry) => [entry.id, entry.color]));
+
+  // The next date someone could bring a present for.
+  const now = new Date();
+  const nextEvent =
+    listWishlists(user.id)
+      .filter((list) => list.eventDate && daysUntil(list.eventDate, now) >= 0)
+      .sort((a, b) => a.eventDate!.getTime() - b.eventDate!.getTime())[0] ?? null;
+
+  return (
+    <div className="mx-auto max-w-2xl space-y-7">
+      <h1 className="text-3xl font-semibold tracking-tight">Hallo {user.name}!</h1>
+
+      <section className="relative">
+        <Studs count={3} />
+        <div className="brick rounded-xl bg-card p-4 text-card-foreground">
+          <div className="flex items-baseline justify-between gap-3">
+            <h2 className="text-lg font-semibold">Unsere Sammlung</h2>
+            <p className="text-sm font-semibold text-muted-foreground">
+              {formatNumber(stats.setCount)} von {pluralize(totalSets, 'Set', 'Sets')}
+            </p>
+          </div>
+
+          <ol
+            aria-label={`${formatNumber(stats.setCount)} von ${formatNumber(totalSets)} Sets vorhanden`}
+            className="mt-5 grid grid-cols-10 items-end gap-1.5"
+          >
+            {bricks.map((key, index) => (
+              <li key={index} aria-hidden className="relative">
+                {key === null ? (
+                  <span className="block h-7 rounded-[6px] border-2 border-dashed border-muted-foreground/50" />
+                ) : (
+                  <>
+                    <span
+                      className={cn(
+                        'stud mx-auto mb-[calc(var(--edge-w)*-1)] !h-1.5 !w-3 !rounded-t-[4px] [display:var(--studs)]',
+                        key ? collectorDotClass(colorById.get(key)) : 'bg-secondary',
+                      )}
+                    />
+                    <span
+                      className={cn(
+                        'block h-7 rounded-[6px] border-[length:var(--edge-w)] border-edge',
+                        key ? collectorDotClass(colorById.get(key)) : 'bg-secondary',
+                      )}
+                    />
+                  </>
+                )}
+              </li>
+            ))}
+          </ol>
+
+          {showCollectors ? (
+            <ul className="mt-3 flex flex-wrap gap-x-4 gap-y-1 text-xs font-semibold">
+              {collectors.map((entry) => (
+                <li key={entry.id} className="flex items-center gap-1.5">
+                  <span
+                    aria-hidden
+                    className={cn(
+                      'size-3 rounded-[3px] border-[length:var(--edge-w)] border-edge',
+                      collectorDotClass(entry.color),
+                    )}
+                  />
+                  {entry.name}
+                </li>
+              ))}
+              <li className="flex items-center gap-1.5 text-muted-foreground">
+                <span
+                  aria-hidden
+                  className="size-3 rounded-[3px] border-2 border-dashed border-muted-foreground/50"
+                />
+                fehlt noch
+              </li>
+            </ul>
+          ) : null}
+        </div>
+      </section>
+
+      <section className="grid grid-cols-2 gap-3">
+        <div className="relative">
+          <Studs studClassName="bg-secondary" />
+          <div className="brick h-full rounded-xl bg-secondary p-4 text-secondary-foreground">
+            <p className="text-2xl font-bold tabular-nums [font-family:var(--font-display)]">
+              {formatNumber(stats.pieceCount)}
+            </p>
+            <p className="text-sm font-semibold">Teile verbaut</p>
+          </div>
+        </div>
+        <div className="relative">
+          <Studs studClassName="bg-owned" />
+          <div className="brick h-full rounded-xl bg-owned p-4 text-owned-foreground">
+            <p className="text-2xl font-bold tabular-nums [font-family:var(--font-display)]">
+              {formatEuro(stats.currentValueCents)}
+            </p>
+            <p className="text-sm font-semibold">
+              {stats.currentValueCents === stats.retailValueCents ? 'Wert nach UVP' : 'Aktueller Wert'}
+            </p>
+          </div>
+        </div>
+      </section>
+
+      {nextEvent?.eventDate ? (
+        <Link href={`/wunschlisten/${nextEvent.id}`} className="relative block rounded-xl">
+          <Studs count={4} studClassName="bg-primary" />
+          <div className="brick flex items-center gap-4 rounded-xl bg-primary p-4 text-primary-foreground">
+            <div className="flex size-14 shrink-0 flex-col items-center justify-center rounded-lg border-[length:var(--edge-w)] border-edge bg-card text-card-foreground">
+              <span className="text-xl leading-none font-bold [font-family:var(--font-display)]">
+                {formatDate(nextEvent.eventDate).slice(0, 5)}
+              </span>
+            </div>
+            <div className="min-w-0 flex-1">
+              <p className="truncate text-lg font-semibold [font-family:var(--font-display)]">
+                {nextEvent.title}
+              </p>
+              <p className="text-sm font-semibold">
+                {daysLabel(daysUntil(nextEvent.eventDate, now))} ·{' '}
+                {nextEvent.openCount === 1
+                  ? '1 Wunsch noch offen'
+                  : `${formatNumber(nextEvent.openCount)} Wünsche noch offen`}
+              </p>
+            </div>
+            <ChevronRight className="size-5 shrink-0" aria-hidden />
+          </div>
+        </Link>
+      ) : null}
+
+      <section className="flex flex-wrap gap-3">
+        <Button asChild variant="outline" size="lg">
+          <Link href="/katalog?besitz=fehlt">
+            <PackageSearch aria-hidden />
+            {missing === 1 ? '1 Set fehlt noch' : `${formatNumber(missing)} Sets fehlen noch`}
          </Link>
-        ))}
-      </div>
+        </Button>
+        <Button asChild variant="outline" size="lg">
+          <Link href="/wunschlisten">
+            <Gift aria-hidden />
+            Wunschlisten
+          </Link>
+        </Button>
+        <Button asChild size="lg">
+          <Link href="/katalog/neu">
+            <Plus aria-hidden />
+            Set anlegen
+          </Link>
+        </Button>
+      </section>
    </div>
  );
 }
@@ -1,12 +1,14 @@
 import type { Metadata } from 'next';
 import Link from 'next/link';
-import { Boxes, Euro, ImageOff, Layers, PackageSearch } from 'lucide-react';
+import { Boxes, Euro, Layers, PackageSearch } from 'lucide-react';
+import { SetPlaceholder } from '@/components/brick/set-placeholder';
+import { Studs } from '@/components/brick/studs';
 import { CollectorFilter } from '@/components/layout/collector-filter';
 import { CollectionFilters } from '@/components/sammlung/collection-filters';
 import { Badge } from '@/components/ui/badge';
 import { Card, CardContent } from '@/components/ui/card';
 import { formatDate, formatNumber, pluralize } from '@/lib/format';
-import { collectorBadgeClass } from '@/lib/collector-colors';
+import { collectorBadgeClass, collectorDotClass } from '@/lib/collector-colors';
 import { setImageSrc } from '@/lib/images';
 import { completenessLabel, statusLabel } from '@/lib/labels';
 import { formatEuro } from '@/lib/money';
@@ -122,23 +124,31 @@ export default async function SammlungPage({ searchParams }: { searchParams: Sea
          </Link>
        </div>
      ) : (
-        <ul className="divide-y divide-border rounded-lg border border-border">
+        <ul className="space-y-5 pt-2">
          {items.map((item) => {
            const image = setImageSrc(item);
            return (
-              <li key={item.id}>
+              <li key={item.id} className="relative">
+                {/* The studs carry the collector's colour once there is more than one. */}
+                <Studs
+                  studClassName={
+                    collectors.length > 1 ? collectorDotClass(item.collectorColor) : undefined
+                  }
+                />
                <Link
                  href={`/katalog/${item.setId}`}
-                  className="flex items-center gap-3 p-3 transition-colors hover:bg-muted/50"
+                  className="brick flex items-center gap-3 rounded-xl bg-card p-3 transition-colors hover:bg-muted/50"
                >
-                  <div className="size-14 shrink-0 overflow-hidden rounded-lg border border-border bg-muted">
+                  <div className="size-16 shrink-0 overflow-hidden rounded-lg border-[length:max(1px,var(--edge-w))] border-edge bg-muted">
                    {image ? (
                      // eslint-disable-next-line @next/next/no-img-element
                      <img src={image} alt="" loading="lazy" className="size-full object-contain" />
                    ) : (
-                      <div className="flex size-full items-center justify-center text-muted-foreground">
-                        <ImageOff className="size-5" aria-hidden />
-                      </div>
+                      <SetPlaceholder
+                        setNumber={item.setNumber}
+                        manufacturerName={item.manufacturerName}
+                        size="sm"
+                      />
                    )}
                  </div>

@@ -150,7 +160,11 @@ export default async function SammlungPage({ searchParams }: { searchParams: Sea
                        .join(' · ')}
                    </p>
                    <div className="mt-1 flex flex-wrap items-center gap-1">
-                      <Badge variant={item.status === 'sold' ? 'outline' : 'default'}>
+                      {/* Green like "Vorhanden" in the catalog; red stays for actions. */}
+                      <Badge
+                        variant={item.status === 'sold' ? 'outline' : 'default'}
+                        className={item.status === 'sold' ? undefined : 'bg-owned text-owned-foreground'}
+                      >
                        {statusLabel(item.status)}
                      </Badge>
                      {item.completeness !== 'unknown' ? (
@@ -1,11 +1,14 @@
 import Link from 'next/link';
-import { Blocks } from 'lucide-react';
+import { BrickLogo } from '@/components/brick/logo';

 export default function AuthLayout({ children }: { children: React.ReactNode }) {
  return (
    <div className="flex min-h-dvh flex-col items-center justify-center gap-8 px-4 py-10">
-      <Link href="/" className="flex items-center gap-2 text-xl font-semibold tracking-tight">
-        <Blocks className="size-6 text-primary" aria-hidden />
+      <Link
+        href="/"
+        className="flex items-center gap-2 text-2xl font-bold tracking-tight [font-family:var(--font-display)]"
+      >
+        <BrickLogo className="h-8 w-9" />
        Bricktrack
      </Link>
      <main className="w-full max-w-sm">{children}</main>
@@ -0,0 +1,301 @@
+/*
+ * Selectable designs. Each one is a set of tokens under :root[data-design=...]
+ * (the attribute is set in the root layout from a cookie, see src/lib/design.ts).
+ * The neutral "schlicht" design uses the defaults from globals.css.
+ *
+ * Token additions on top of shadcn:
+ *   --font-display   headings and big numbers
+ *   --edge, --edge-w outline of cards, buttons and badges
+ *   --lift(-sm)      the hard bottom edge that makes a card look like a brick
+ *   --studs          "flex" shows the studs on top of cards, "none" hides them
+ *   --tone-1..5      placeholder colours for sets without an image
+ *   --owned          the "Vorhanden" badge
+ */
+
+/* --- Klemmbaustein (default) --------------------------------------------- */
+:root[data-design='klemmbaustein'] {
+  --font-sans: 'Nunito Variable', ui-sans-serif, system-ui, sans-serif;
+  --font-display: 'Fredoka Variable', ui-sans-serif, system-ui, sans-serif;
+  --radius: 1rem;
+
+  --background: #fff6e5;
+  --foreground: #24203f;
+  --card: #ffffff;
+  --card-foreground: #24203f;
+  --popover: #ffffff;
+  --popover-foreground: #24203f;
+  --primary: #d63a30;
+  --primary-foreground: #ffffff;
+  --secondary: #ffc93c;
+  --secondary-foreground: #24203f;
+  --muted: #f6ead0;
+  --muted-foreground: #5f5a78;
+  --accent: #ffe9b0;
+  --accent-foreground: #24203f;
+  --destructive: #c62828;
+  --border: rgb(36 32 63 / 0.16);
+  --input: #24203f;
+  --ring: #2f6bea;
+
+  --logo: #ffc93c;
+  --edge: #24203f;
+  --edge-w: 2px;
+  --lift: 0 4px 0 #24203f;
+  --lift-sm: 0 3px 0 #24203f;
+  --studs: flex;
+  --owned: #2ebd85;
+  --owned-foreground: #24203f;
+  --tone-ink: #24203f;
+  --tone-1: #ffe08a;
+  --tone-2: #bfd6ff;
+  --tone-3: #bdebd3;
+  --tone-4: #ffc9d9;
+  --tone-5: #e2d6ff;
+}
+
+/* --- Warm ---------------------------------------------------------------- */
+:root[data-design='warm'] {
+  --font-sans: 'Inter Variable', ui-sans-serif, system-ui, sans-serif;
+  --font-display: 'Bricolage Grotesque Variable', ui-sans-serif, system-ui, sans-serif;
+  --radius: 0.875rem;
+
+  --background: #f6f3ec;
+  --foreground: #1d1b17;
+  --card: #ffffff;
+  --card-foreground: #1d1b17;
+  --popover: #ffffff;
+  --popover-foreground: #1d1b17;
+  --primary: #c8381f;
+  --primary-foreground: #ffffff;
+  --secondary: #fbe3a6;
+  --secondary-foreground: #1d1b17;
+  --muted: #ece6da;
+  --muted-foreground: #5f594f;
+  --accent: #fbe3a6;
+  --accent-foreground: #1d1b17;
+  --destructive: #b42318;
+  --border: #e2dbcd;
+  --input: #d6cebf;
+  --ring: #c8381f;
+
+  --edge: transparent;
+  --edge-w: 0px;
+  --lift: 0 1px 2px rgb(29 27 23 / 0.06);
+  --lift-sm: none;
+  --studs: none;
+  --owned: #1f7a4d;
+  --owned-foreground: #ffffff;
+  --tone-ink: #1d1b17;
+  --tone-1: #fbe3a6;
+  --tone-2: #d6e6f5;
+  --tone-3: #dde8d2;
+  --tone-4: #f6d5cc;
+  --tone-5: #e5ddf0;
+}
+
+/* --- Nachtblau (dark) ---------------------------------------------------- */
+:root[data-design='nacht'] {
+  color-scheme: dark;
+  --font-sans: 'Inter Variable', ui-sans-serif, system-ui, sans-serif;
+  --font-display: 'Outfit Variable', ui-sans-serif, system-ui, sans-serif;
+  --radius: 1.125rem;
+
+  --background: #0e1422;
+  --foreground: #f2f4f8;
+  --card: #182136;
+  --card-foreground: #f2f4f8;
+  --popover: #1b2540;
+  --popover-foreground: #f2f4f8;
+  --primary: #ffc93c;
+  --primary-foreground: #1a1300;
+  --secondary: #222d45;
+  --secondary-foreground: #f2f4f8;
+  --muted: #222d45;
+  --muted-foreground: #a3adc2;
+  --accent: #2a3654;
+  --accent-foreground: #f2f4f8;
+  --destructive: #f87171;
+  --border: #2c3854;
+  --input: #34405e;
+  --ring: #ffc93c;
+
+  --edge: transparent;
+  --edge-w: 0px;
+  --lift: none;
+  --lift-sm: none;
+  --studs: none;
+  --owned: #1e4d3a;
+  --owned-foreground: #8fe3b8;
+  --tone-ink: #f2f4f8;
+  --tone-1: #3a3218;
+  --tone-2: #1b2c44;
+  --tone-3: #22331e;
+  --tone-4: #3d2230;
+  --tone-5: #2c2546;
+}
+
+/* --- Bonbon -------------------------------------------------------------- */
+:root[data-design='bonbon'] {
+  --font-sans: 'Nunito Variable', ui-sans-serif, system-ui, sans-serif;
+  --font-display: 'Fredoka Variable', ui-sans-serif, system-ui, sans-serif;
+  --radius: 1.5rem;
+
+  --background: #f4f0ff;
+  --foreground: #23194a;
+  --card: #ffffff;
+  --card-foreground: #23194a;
+  --popover: #ffffff;
+  --popover-foreground: #23194a;
+  --primary: #6d4aff;
+  --primary-foreground: #ffffff;
+  --secondary: #ede7ff;
+  --secondary-foreground: #4b2fc4;
+  --muted: #ede7ff;
+  --muted-foreground: #5e567c;
+  --accent: #ede7ff;
+  --accent-foreground: #23194a;
+  --destructive: #c62828;
+  --border: #e4ddf7;
+  --input: #d8cff3;
+  --ring: #6d4aff;
+
+  --edge: transparent;
+  --edge-w: 0px;
+  --lift: 0 8px 24px rgb(35 25 74 / 0.08);
+  --lift-sm: none;
+  --studs: none;
+  --owned: #157a57;
+  --owned-foreground: #ffffff;
+  --tone-ink: #23194a;
+  --tone-1: #fff1c7;
+  --tone-2: #dff0ff;
+  --tone-3: #ddf7ea;
+  --tone-4: #ffe1d1;
+  --tone-5: #ffddeb;
+}
+
+/* --- Bauklotz ------------------------------------------------------------ */
+:root[data-design='bauklotz'] {
+  --font-sans: 'Archivo Variable', ui-sans-serif, system-ui, sans-serif;
+  --font-display: 'Archivo Variable', ui-sans-serif, system-ui, sans-serif;
+  --radius: 0.75rem;
+
+  --background: #fffbef;
+  --foreground: #111111;
+  --card: #ffffff;
+  --card-foreground: #111111;
+  --popover: #ffffff;
+  --popover-foreground: #111111;
+  --primary: #1e5eff;
+  --primary-foreground: #ffffff;
+  --secondary: #ffd500;
+  --secondary-foreground: #111111;
+  --muted: #f3eedc;
+  --muted-foreground: #4a4a4a;
+  --accent: #ffd500;
+  --accent-foreground: #111111;
+  --destructive: #c62828;
+  --border: rgb(17 17 17 / 0.2);
+  --input: #111111;
+  --ring: #1e5eff;
+
+  --logo: #ffd500;
+  --edge: #111111;
+  --edge-w: 2.5px;
+  --lift: 4px 4px 0 #111111;
+  --lift-sm: 3px 3px 0 #111111;
+  --studs: none;
+  --owned: #111111;
+  --owned-foreground: #ffffff;
+  --tone-ink: #111111;
+  --tone-1: #ffd500;
+  --tone-2: #7fb2ff;
+  --tone-3: #8bd17c;
+  --tone-4: #ff8a7a;
+  --tone-5: #c9a7ff;
+}
+
+:root[data-design='bauklotz'] :is(h1, h2) {
+  font-weight: 900;
+  text-transform: uppercase;
+  letter-spacing: -0.01em;
+}
+
+/*
+ * Surfaces. Unlayered on purpose: these must win over the utility classes of
+ * the shadcn components, which carry the neutral look. Focused elements keep
+ * their ring (also a box-shadow), so the lift steps aside for it.
+ */
+[data-slot='card'] {
+  border: var(--edge-w) solid var(--edge);
+  box-shadow: var(--lift);
+}
+
+:root:is([data-design='klemmbaustein'], [data-design='bauklotz']) {
+  & [data-slot='button']:is(
+      [data-variant='default'],
+      [data-variant='outline'],
+      [data-variant='secondary'],
+      [data-variant='destructive']
+    ) {
+    border-width: var(--edge-w);
+    border-color: var(--edge);
+    font-weight: 700;
+
+    &:not(:focus-visible) {
+      box-shadow: var(--lift-sm);
+    }
+
+    &:active:not(:disabled) {
+      translate: 0 2px;
+      box-shadow: none;
+    }
+  }
+
+  & [data-slot='badge'] {
+    border-width: 2px;
+    border-color: var(--edge);
+    border-radius: calc(var(--radius) * 0.5);
+    font-weight: 800;
+  }
+
+  & :is([data-slot='input'], [data-slot='textarea'], [data-slot='native-select'], [data-slot='select-trigger']) {
+    border-width: var(--edge-w);
+    border-color: var(--edge);
+  }
+
+  & :is([data-slot='dialog-content'], [data-slot='alert-dialog-content'], [data-slot='popover-content'], [data-slot='dropdown-menu-content'], [data-slot='select-content']) {
+    border: var(--edge-w) solid var(--edge);
+    box-shadow: var(--lift);
+  }
+}
+
+/* A surface outside the shadcn components (set tiles, list entries). */
+@utility brick {
+  border: var(--edge-w) solid var(--edge);
+  box-shadow: var(--lift);
+}
+
+/* --- Studs ---------------------------------------------------------------- */
+/* In a layer, so a utility class on a stud (collector colour) still wins. */
+@layer components {
+  .studs {
+    display: var(--studs);
+    position: absolute;
+    top: calc(var(--edge-w) - 10px);
+    left: 16px;
+    gap: 10px;
+    pointer-events: none;
+  }
+
+  .stud {
+    display: block;
+    width: 20px;
+    height: 10px;
+    box-sizing: border-box;
+    border: var(--edge-w) solid var(--edge);
+    border-bottom: 0;
+    border-radius: 7px 7px 0 0;
+    background: var(--card);
+  }
+}
@@ -1,6 +1,7 @@
@import "tailwindcss";
@import "tw-animate-css";
@import "shadcn/tailwind.css";
+@import "./designs.css";

@custom-variant dark (&:is(.dark *));

@@ -10,6 +11,7 @@
    "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
+  --font-display: var(--font-sans);
 }


@@ -18,7 +20,16 @@
  --color-foreground: var(--foreground);
  --font-sans: var(--font-sans);
  --font-mono: var(--font-mono);
-  --font-heading: var(--font-sans);
+  --font-heading: var(--font-display);
+  --color-edge: var(--edge);
+  --color-owned: var(--owned);
+  --color-owned-foreground: var(--owned-foreground);
+  --color-tone-ink: var(--tone-ink);
+  --color-tone-1: var(--tone-1);
+  --color-tone-2: var(--tone-2);
+  --color-tone-3: var(--tone-3);
+  --color-tone-4: var(--tone-4);
+  --color-tone-5: var(--tone-5);
  --color-sidebar-ring: var(--sidebar-ring);
  --color-sidebar-border: var(--sidebar-border);
  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
@@ -90,6 +101,21 @@
  --sidebar-accent-foreground: oklch(0.205 0 0);
  --sidebar-border: oklch(0.922 0 0);
  --sidebar-ring: oklch(0.708 0 0);
+  /* Brick look: outline, "lift" (the hard bottom edge) and studs. The
+     neutral design has none of it; see designs.css for the others. */
+  --edge: oklch(0.145 0 0 / 10%);
+  --edge-w: 1px;
+  --lift: none;
+  --lift-sm: none;
+  --studs: none;
+  --owned: oklch(0.596 0.145 163.225);
+  --owned-foreground: oklch(1 0 0);
+  --tone-ink: oklch(0.556 0 0);
+  --tone-1: oklch(0.97 0 0);
+  --tone-2: oklch(0.97 0 0);
+  --tone-3: oklch(0.97 0 0);
+  --tone-4: oklch(0.97 0 0);
+  --tone-5: oklch(0.97 0 0);
 }

 .dark {
@@ -136,4 +162,9 @@
  html {
    @apply font-sans;
  }
-}
+  h1,
+  h2,
+  h3 {
+    font-family: var(--font-display);
+  }
+}␍
@@ -1,6 +1,14 @@
 import type { Metadata, Viewport } from 'next';
+import { cookies } from 'next/headers';
+import '@fontsource-variable/archivo';
+import '@fontsource-variable/bricolage-grotesque';
+import '@fontsource-variable/fredoka';
+import '@fontsource-variable/inter';
+import '@fontsource-variable/nunito';
+import '@fontsource-variable/outfit';
 import { ServiceWorkerRegistration } from '@/components/layout/service-worker';
 import { Toaster } from '@/components/ui/sonner';
+import { DESIGN_COOKIE, DESIGN_INFO, resolveDesign } from '@/lib/design';
 import './globals.css';

 export const metadata: Metadata = {
@@ -25,19 +33,30 @@ export const metadata: Metadata = {
  robots: { index: false, follow: false },
 };

-export const viewport: Viewport = {
-  width: 'device-width',
-  initialScale: 1,
-  viewportFit: 'cover',
-  themeColor: [
-    { media: '(prefers-color-scheme: light)', color: '#ffffff' },
-    { media: '(prefers-color-scheme: dark)', color: '#0a0a0a' },
-  ],
-};
+async function currentDesign() {
+  return resolveDesign((await cookies()).get(DESIGN_COOKIE)?.value);
+}
+
+export async function generateViewport(): Promise<Viewport> {
+  const design = await currentDesign();
+  return {
+    width: 'device-width',
+    initialScale: 1,
+    viewportFit: 'cover',
+    themeColor: DESIGN_INFO[design].themeColor,
+  };
+}
+
+export default async function RootLayout({ children }: Readonly<{ children: React.ReactNode }>) {
+  const design = await currentDesign();

-export default function RootLayout({ children }: Readonly<{ children: React.ReactNode }>) {
  return (
-    <html lang="de" suppressHydrationWarning>
+    <html
+      lang="de"
+      data-design={design}
+      className={DESIGN_INFO[design].dark ? 'dark' : undefined}
+      suppressHydrationWarning
+    >
      <body className="min-h-dvh bg-background text-foreground antialiased">
        {children}
        <Toaster position="top-center" richColors closeButton />
@@ -1,6 +1,8 @@
 import type { Metadata } from 'next';
 import { notFound } from 'next/navigation';
-import { Blocks, CalendarDays, Gift } from 'lucide-react';
+import { CalendarDays, Gift } from 'lucide-react';
+import { BrickLogo } from '@/components/brick/logo';
+import { Studs } from '@/components/brick/studs';
 import { PublicWishlist, type PublicItem } from '@/components/wunschlisten/public-wishlist';
 import { Badge } from '@/components/ui/badge';
 import { formatDate, pluralize } from '@/lib/format';
@@ -54,50 +56,56 @@ export default async function PublicWishlistPage({ params }: Props) {
  const openCount = items.filter((item) => !item.isReserved).length;

  return (
-    <div className="mx-auto min-h-dvh w-full max-w-2xl px-4 py-8">
-      <header className="space-y-3 border-b border-border pb-6">
-        <div className="flex items-center gap-2 text-sm text-muted-foreground">
-          <Blocks className="size-4 text-primary" aria-hidden />
-          Bricktrack
-        </div>
+    <div className="min-h-dvh">
+      <header className="border-b-[length:max(1px,var(--edge-w))] border-edge bg-primary text-primary-foreground">
+        <div className="mx-auto w-full max-w-2xl space-y-3 px-4 pt-6 pb-10">
+          <div className="flex items-center gap-2 text-sm font-semibold">
+            <BrickLogo className="h-5 w-6" />
+            Bricktrack
+          </div>

-        <h1 className="text-2xl font-semibold tracking-tight">{list.title}</h1>
+          <h1 className="text-3xl font-semibold tracking-tight">{list.title}</h1>

-        <div className="flex flex-wrap items-center gap-2">
-          <Badge variant="secondary" className="gap-1">
-            <Gift className="size-3" aria-hidden />
-            {occasionLabel(list.occasion)}
-          </Badge>
-          {list.eventDate ? (
-            <Badge variant="outline" className="gap-1">
-              <CalendarDays className="size-3" aria-hidden />
-              {formatDate(list.eventDate)}
+          <div className="flex flex-wrap items-center gap-2">
+            <Badge className="gap-1 bg-card text-card-foreground">
+              <Gift className="size-3" aria-hidden />
+              {occasionLabel(list.occasion)}
            </Badge>
-          ) : null}
-          <span className="text-sm text-muted-foreground">
-            {pluralize(openCount, 'Wunsch noch offen', 'Wünsche noch offen')}
-          </span>
+            {list.eventDate ? (
+              <Badge className="gap-1 bg-card text-card-foreground">
+                <CalendarDays className="size-3" aria-hidden />
+                {formatDate(list.eventDate)}
+              </Badge>
+            ) : null}
+            <Badge variant="secondary">
+              {pluralize(openCount, 'Wunsch noch offen', 'Wünsche noch offen')}
+            </Badge>
+          </div>
        </div>
-
-        {list.note ? (
-          <p className="rounded-lg bg-muted p-3 text-sm whitespace-pre-line">{list.note}</p>
-        ) : null}
-
-        <p className="text-xs text-muted-foreground">
-          Klick auf „Das schenke ich“, damit niemand dasselbe doppelt kauft. Eine Anmeldung
-          brauchst du dafür nicht.
-        </p>
      </header>

-      <main className="py-6">
-        {items.length === 0 ? (
-          <p className="rounded-lg border border-dashed border-border p-8 text-center text-sm text-muted-foreground">
-            Auf dieser Liste steht gerade nichts.
-          </p>
-        ) : (
-          <PublicWishlist shareToken={shareToken} items={items} />
-        )}
-      </main>
+      <div className="mx-auto w-full max-w-2xl px-4 pb-8">
+        <div className="relative -mt-5">
+          <Studs />
+          <div className="brick space-y-2 rounded-xl bg-card p-4 text-card-foreground">
+            {list.note ? <p className="text-sm whitespace-pre-line">{list.note}</p> : null}
+            <p className="text-xs text-muted-foreground">
+              Klick auf „Das schenke ich“, damit niemand dasselbe doppelt kauft. Eine Anmeldung
+              brauchst du dafür nicht.
+            </p>
+          </div>
+        </div>
+
+        <main className="py-6">
+          {items.length === 0 ? (
+            <p className="rounded-lg border border-dashed border-border p-8 text-center text-sm text-muted-foreground">
+              Auf dieser Liste steht gerade nichts.
+            </p>
+          ) : (
+            <PublicWishlist shareToken={shareToken} items={items} />
+          )}
+        </main>
+      </div>
    </div>
  );
 }
@@ -0,0 +1,18 @@
+/** The app mark: a 2x1 brick in the design's logo colour. */
+export function BrickLogo({ className }: { className?: string }) {
+  return (
+    <svg viewBox="0 0 38 32" aria-hidden className={className}>
+      <g
+        style={{
+          fill: 'var(--logo, var(--primary))',
+          stroke: 'var(--edge)',
+          strokeWidth: 'var(--edge-w)',
+        }}
+      >
+        <rect x="9" y="2" width="8" height="8" rx="2.5" />
+        <rect x="21" y="2" width="8" height="8" rx="2.5" />
+        <rect x="2" y="8" width="34" height="22" rx="6" />
+      </g>
+    </svg>
+  );
+}
@@ -0,0 +1,66 @@
+import { cn } from 'cn';
+import { toneIndex } from '@/lib/design';
+
+const TONE_CLASSES: Record<number, string> = {
+  1: 'bg-tone-1',
+  2: 'bg-tone-2',
+  3: 'bg-tone-3',
+  4: 'bg-tone-4',
+  5: 'bg-tone-5',
+};
+
+/**
+ * Stand-in for a set without an image: the manufacturer's tone, a drawn
+ * brick and the set number. Reads as intended rather than as "image broken".
+ */
+export function SetPlaceholder({
+  setNumber,
+  manufacturerName,
+  size = 'md',
+  className,
+}: {
+  setNumber: string;
+  manufacturerName: string;
+  size?: 'sm' | 'md' | 'lg';
+  className?: string;
+}) {
+  const tone = TONE_CLASSES[toneIndex(manufacturerName)];
+
+  return (
+    <div
+      className={cn(
+        'relative flex size-full items-end overflow-hidden text-tone-ink',
+        size === 'sm' ? 'p-1.5' : 'p-3',
+        tone,
+        className,
+      )}
+    >
+      {size !== 'sm' ? (
+        <svg
+          viewBox="0 0 70 44"
+          aria-hidden
+          className={cn(
+            'absolute opacity-40',
+            size === 'lg' ? 'top-[18%] right-[12%] w-2/5' : 'top-3 right-3 w-1/3',
+          )}
+        >
+          <g fill="none" stroke="currentColor" strokeWidth="2.5">
+            <rect x="12" y="2" width="16" height="10" rx="3" />
+            <rect x="42" y="2" width="16" height="10" rx="3" />
+            <rect x="2" y="10" width="66" height="32" rx="7" />
+          </g>
+        </svg>
+      ) : null}
+      <span
+        className={cn(
+          'relative leading-none font-bold tracking-tight [font-family:var(--font-display)] tabular-nums',
+          size === 'sm' && 'text-xs',
+          size === 'md' && (setNumber.length > 6 ? 'text-lg' : 'text-2xl'),
+          size === 'lg' && 'text-5xl',
+        )}
+      >
+        {setNumber}
+      </span>
+    </div>
+  );
+}
@@ -0,0 +1,25 @@
+import { cn } from 'cn';
+
+/**
+ * The row of studs on top of a card. Purely decorative and only visible in
+ * designs that set `--studs: flex`. The parent must be `relative` and must not
+ * clip its overflow - place it next to the card, not inside.
+ */
+export function Studs({
+  count = 2,
+  className,
+  studClassName,
+}: {
+  count?: number;
+  className?: string;
+  /** Colour of the studs, e.g. the collector's dot class. */
+  studClassName?: string;
+}) {
+  return (
+    <span aria-hidden className={cn('studs', className)}>
+      {Array.from({ length: count }, (_, index) => (
+        <span key={index} className={cn('stud', studClassName)} />
+      ))}
+    </span>
+  );
+}
@@ -217,7 +217,8 @@ export function CatalogGrid({
                'relative rounded-xl text-left outline-none transition-opacity',
                'focus-visible:ring-3 focus-visible:ring-ring/50',
                owned && 'cursor-not-allowed opacity-50',
-                isSelected && '[&>div]:border-primary [&>div]:ring-2 [&>div]:ring-primary/40',
+                isSelected &&
+                  '[&_.brick]:outline-3 [&_.brick]:outline-offset-2 [&_.brick]:outline-primary',
              )}
            >
              <SetCardContent set={item} />
@@ -0,0 +1,155 @@
+'use client';
+
+import Link from 'next/link';
+import { useRouter } from 'next/navigation';
+import { useState, useTransition } from 'react';
+import { Link2, Loader2 } from 'lucide-react';
+import { toast } from 'sonner';
+import { previewSetFromLink, type LinkPreview } from '@/app/(app)/katalog/link-actions';
+import { SetForm, type SetPrefill } from '@/components/katalog/set-form';
+import { Button } from '@/components/ui/button';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { Field } from '@/components/ui/field';
+import { Input } from '@/components/ui/input';
+
+function toPrefill(preview: LinkPreview): SetPrefill {
+  return {
+    manufacturerId: preview.manufacturerId ?? undefined,
+    setNumber: preview.setNumber || undefined,
+    name: preview.name || undefined,
+    year: preview.year,
+    pieceCount: preview.pieceCount,
+    minifigCount: preview.minifigCount,
+    ean: preview.ean || null,
+    imageUrl: preview.imageUrl || null,
+    cacheImage: Boolean(preview.imageUrl),
+    notes: `Übernommen aus: ${preview.sourceUrl}`,
+  };
+}
+
+/**
+ * "Neues Set" with the link import on top: paste a link from a shop, a price
+ * comparison or a set database, check the prefilled form, save.
+ */
+export function NewSetEntry({
+  manufacturers,
+  themes,
+  defaultEan,
+  children,
+}: {
+  manufacturers: Array<{ id: string; name: string }>;
+  themes: Array<{ id: string; name: string; manufacturerId: string }>;
+  defaultEan?: string;
+  /** Shown instead of the form while there is no manufacturer yet. */
+  children?: React.ReactNode;
+}) {
+  const router = useRouter();
+  const [url, setUrl] = useState('');
+  const [prefill, setPrefill] = useState<SetPrefill | undefined>(undefined);
+  const [version, setVersion] = useState(0);
+  const [existing, setExisting] = useState<{ id: string; label: string } | null>(null);
+  const [pending, startTransition] = useTransition();
+
+  function submit(event: React.FormEvent<HTMLFormElement>) {
+    event.preventDefault();
+    setExisting(null);
+
+    startTransition(async () => {
+      const result = await previewSetFromLink({ url });
+      if (!result.ok) {
+        toast.error(result.error);
+        return;
+      }
+
+      const preview = result.data;
+      if (preview.existingSetId) {
+        setExisting({
+          id: preview.existingSetId,
+          label: [preview.setNumber, preview.name].filter(Boolean).join(' · '),
+        });
+        return;
+      }
+
+      setPrefill(toPrefill(preview));
+      setVersion((value) => value + 1);
+      // A manufacturer may just have been created for the draft.
+      router.refresh();
+
+      const missing = [
+        preview.manufacturerId ? null : 'Hersteller',
+        preview.setNumber ? null : 'Setnummer',
+        preview.name ? null : 'Name',
+      ].filter(Boolean);
+
+      toast.success(
+        missing.length === 0
+          ? `Übernommen aus ${preview.sources.join(', ')}. Bitte kurz prüfen und speichern.`
+          : `Übernommen aus ${preview.sources.join(', ')} – ${missing.join(', ')} bitte ergänzen.`,
+      );
+      if (preview.pageBlocked) {
+        toast.info('Die Seite selbst ließ sich nicht lesen – die Angaben stammen aus dem Link.');
+      }
+    });
+  }
+
+  return (
+    <>
+      <Card>
+        <CardHeader>
+          <CardTitle>Aus einem Link übernehmen</CardTitle>
+          <CardDescription>
+            Link zu Amazon, idealo, geizhals, zum Shop des Herstellers oder zu einer Set-Datenbank
+            einfügen. Die Angaben landen im Formular unten – gespeichert wird erst, wenn du es
+            sagst.
+          </CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-3">
+          <form onSubmit={submit} className="flex items-end gap-2">
+            <Field label="Link" htmlFor="import-link" className="flex-1">
+              <Input
+                id="import-link"
+                type="url"
+                inputMode="url"
+                value={url}
+                onChange={(event) => setUrl(event.target.value)}
+                placeholder="https://…"
+                maxLength={2000}
+              />
+            </Field>
+            <Button type="submit" size="lg" disabled={pending || url.trim().length === 0}>
+              {pending ? <Loader2 className="animate-spin" /> : <Link2 />}
+              Übernehmen
+            </Button>
+          </form>
+
+          {existing ? (
+            <p className="rounded-lg bg-muted p-3 text-sm">
+              Das Set ist schon im Katalog:{' '}
+              <Link href={`/katalog/${existing.id}`} className="font-semibold underline">
+                {existing.label}
+              </Link>
+            </p>
+          ) : null}
+        </CardContent>
+      </Card>
+
+      <div className="flex items-center gap-3 text-xs text-muted-foreground">
+        <span className="h-px flex-1 bg-border" />
+        {prefill ? 'Bitte prüfen und speichern' : 'oder von Hand'}
+        <span className="h-px flex-1 bg-border" />
+      </div>
+
+      {manufacturers.length === 0 ? (
+        children
+      ) : (
+        <SetForm
+          key={`${version}-${manufacturers.length}`}
+          manufacturers={manufacturers}
+          themes={themes}
+          defaultEan={defaultEan}
+          prefill={prefill}
+        />
+      )}
+    </>
+  );
+}
@@ -1,6 +1,8 @@
 import Link from 'next/link';
-import { Check, Gift, ImageOff } from 'lucide-react';
+import { Check, Gift } from 'lucide-react';
 import { cn } from 'cn';
+import { SetPlaceholder } from '@/components/brick/set-placeholder';
+import { Studs } from '@/components/brick/studs';
 import type { CatalogRow } from '@/lib/queries/catalog';
 import { formatEuro } from '@/lib/money';
 import { setImageSrc } from '@/lib/images';
@@ -17,56 +19,59 @@ export function SetCardContent({ set }: { set: CatalogRow }) {
  const owned = set.ownedCopies > 0;

  return (
-    <div className="flex h-full flex-col overflow-hidden rounded-xl border border-border bg-card transition-colors">
-      <div className="relative aspect-square bg-muted">
-        {image ? (
-          // Plain img: images are either local files or a URL the user entered,
-          // and the optimizer must never fetch arbitrary remote hosts.
-          // eslint-disable-next-line @next/next/no-img-element
-          <img
-            src={image}
-            alt=""
-            loading="lazy"
-            decoding="async"
-            className="size-full object-contain p-2"
-          />
-        ) : (
-          <div className="flex size-full items-center justify-center text-muted-foreground">
-            <ImageOff className="size-8" aria-hidden />
+    <div className="relative h-full">
+      <Studs count={3} />
+      <div className="brick flex h-full flex-col overflow-hidden rounded-xl bg-card transition-colors">
+        <div className="relative aspect-square border-b-[length:var(--edge-w)] border-edge bg-muted">
+          {image ? (
+            // Plain img: images are either local files or a URL the user entered,
+            // and the optimizer must never fetch arbitrary remote hosts.
+            // eslint-disable-next-line @next/next/no-img-element
+            <img
+              src={image}
+              alt=""
+              loading="lazy"
+              decoding="async"
+              className="size-full object-contain p-2"
+            />
+          ) : (
+            <SetPlaceholder setNumber={set.setNumber} manufacturerName={set.manufacturerName} />
+          )}
+
+          <div className="absolute top-2 left-2 flex flex-col items-start gap-1">
+            {owned ? (
+              <Badge className="gap-1 bg-owned text-owned-foreground">
+                <Check className="size-3" aria-hidden />
+                {set.ownedCopies > 1 ? `${set.ownedCopies}× vorhanden` : 'Vorhanden'}
+              </Badge>
+            ) : null}
+            {set.wishlistCount > 0 ? (
+              <Badge className="gap-1">
+                <Gift className="size-3" aria-hidden />
+                Auf Wunschliste
+              </Badge>
+            ) : null}
          </div>
-        )}
-
-        <div className="absolute top-2 left-2 flex flex-col items-start gap-1">
-          {owned ? (
-            <Badge className="gap-1 bg-emerald-600 text-white hover:bg-emerald-600">
-              <Check className="size-3" aria-hidden />
-              {set.ownedCopies > 1 ? `${set.ownedCopies}× vorhanden` : 'Vorhanden'}
-            </Badge>
-          ) : null}
-          {set.wishlistCount > 0 ? (
-            <Badge variant="secondary" className="gap-1">
-              <Gift className="size-3" aria-hidden />
-              Auf Wunschliste
-            </Badge>
-          ) : null}
        </div>
-      </div>

-      <div className="flex flex-1 flex-col gap-1 p-3">
-        <div className="flex items-center gap-2 text-xs text-muted-foreground">
-          <Badge variant="outline" className="font-mono">
-            {set.setNumber}
-          </Badge>
-          <span className="truncate">{set.manufacturerName}</span>
-        </div>
-        <p className="line-clamp-2 text-sm leading-snug font-medium">{set.name}</p>
-        <div className="mt-auto flex items-center justify-between gap-2 pt-1 text-xs text-muted-foreground">
-          <span className="truncate">{[set.themeName, set.year].filter(Boolean).join(' · ')}</span>
-          {set.retailPriceCents !== null ? (
-            <span className="shrink-0 font-medium text-foreground">
-              {formatEuro(set.retailPriceCents)}
+        <div className="flex flex-1 flex-col gap-1 p-3">
+          <div className="flex items-center gap-2 text-xs text-muted-foreground">
+            <Badge variant="outline" className="font-mono">
+              {set.setNumber}
+            </Badge>
+            <span className="truncate">{set.manufacturerName}</span>
+          </div>
+          <p className="line-clamp-2 text-sm leading-snug font-medium">{set.name}</p>
+          <div className="mt-auto flex items-center justify-between gap-2 pt-1 text-xs text-muted-foreground">
+            <span className="truncate">
+              {[set.themeName, set.year].filter(Boolean).join(' · ')}
            </span>
-          ) : null}
+            {set.retailPriceCents !== null ? (
+              <span className="shrink-0 font-medium text-foreground">
+                {formatEuro(set.retailPriceCents)}
+              </span>
+            ) : null}
+          </div>
        </div>
      </div>
    </div>
@@ -78,7 +83,7 @@ export function SetCard({ set, className }: { set: CatalogRow; className?: strin
    <Link
      href={`/katalog/${set.id}`}
      className={cn(
-        'rounded-xl outline-none focus-visible:ring-3 focus-visible:ring-ring/50 [&>div]:hover:border-primary/40',
+        'rounded-xl outline-none focus-visible:ring-3 focus-visible:ring-ring/50',
        className,
      )}
    >
@@ -47,19 +47,26 @@ export type SetFormValues = {
  notes: string | null;
 };

+/** A draft for a new set, e.g. from the link import. */
+export type SetPrefill = Partial<Omit<SetFormValues, 'id' | 'imagePath'>> & {
+  /** Download imageUrl on save and keep it locally. */
+  cacheImage?: boolean;
+};
+
 type Props = {
  manufacturers: Array<{ id: string; name: string }>;
  themes: Array<{ id: string; name: string; manufacturerId: string }>;
  set?: SetFormValues;
  /** Prefilled EAN coming from the barcode scanner (phase 2). */
  defaultEan?: string;
+  prefill?: SetPrefill;
 };

-export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
+export function SetForm({ manufacturers, themes, set, defaultEan, prefill }: Props) {
  const router = useRouter();
  const [pending, startTransition] = useTransition();
  const [manufacturerId, setManufacturerId] = useState(
-    set?.manufacturerId ?? manufacturers[0]?.id ?? '',
+    set?.manufacturerId ?? prefill?.manufacturerId ?? manufacturers[0]?.id ?? '',
  );
  const [duplicates, setDuplicates] = useState<DuplicateCandidate[] | null>(null);
  const pendingForm = useRef<FormData | null>(null);
@@ -167,7 +174,7 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
          <Input
            id="setNumber"
            name="setNumber"
-            defaultValue={set?.setNumber ?? ''}
+            defaultValue={set?.setNumber ?? prefill?.setNumber ?? ''}
            required
            maxLength={40}
            placeholder="60398"
@@ -179,7 +186,7 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
          <Input
            id="name"
            name="name"
-            defaultValue={set?.name ?? ''}
+            defaultValue={set?.name ?? prefill?.name ?? ''}
            required
            maxLength={160}
            placeholder="Familienhaus und Elektroauto"
@@ -192,7 +199,7 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
            name="year"
            type="number"
            inputMode="numeric"
-            defaultValue={set?.year ?? ''}
+            defaultValue={set?.year ?? prefill?.year ?? ''}
            min={1930}
            max={new Date().getFullYear() + 5}
          />
@@ -204,7 +211,7 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
            name="pieceCount"
            type="number"
            inputMode="numeric"
-            defaultValue={set?.pieceCount ?? ''}
+            defaultValue={set?.pieceCount ?? prefill?.pieceCount ?? ''}
            min={0}
          />
        </Field>
@@ -215,7 +222,7 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
            name="minifigCount"
            type="number"
            inputMode="numeric"
-            defaultValue={set?.minifigCount ?? ''}
+            defaultValue={set?.minifigCount ?? prefill?.minifigCount ?? ''}
            min={0}
          />
        </Field>
@@ -235,7 +242,7 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
            id="ean"
            name="ean"
            inputMode="numeric"
-            defaultValue={set?.ean ?? defaultEan ?? ''}
+            defaultValue={set?.ean ?? prefill?.ean ?? defaultEan ?? ''}
            maxLength={20}
            className="font-mono"
          />
@@ -256,10 +263,18 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
          name="imageUrl"
          type="url"
          inputMode="url"
-          defaultValue={set?.imageUrl ?? ''}
+          defaultValue={set?.imageUrl ?? prefill?.imageUrl ?? ''}
          placeholder="https://…"
        />
      </Field>
+      {prefill?.cacheImage && prefill.imageUrl ? (
+        <>
+          <input type="hidden" name="cacheImage" value="on" />
+          <p className="-mt-4 text-xs text-muted-foreground">
+            Das Bild aus dem Link wird beim Speichern heruntergeladen und lokal abgelegt.
+          </p>
+        </>
+      ) : null}

      <div className="space-y-2">
        <Label htmlFor="image">Bild hochladen</Label>
@@ -286,7 +301,12 @@ export function SetForm({ manufacturers, themes, set, defaultEan }: Props) {
      </div>

      <Field label="Notizen" htmlFor="notes">
-        <Textarea id="notes" name="notes" defaultValue={set?.notes ?? ''} rows={4} />
+        <Textarea
+          id="notes"
+          name="notes"
+          defaultValue={set?.notes ?? prefill?.notes ?? ''}
+          rows={4}
+        />
      </Field>

      <div className="flex gap-3">
@@ -0,0 +1,88 @@
+'use client';
+
+import { useRouter } from 'next/navigation';
+import { useState, useTransition } from 'react';
+import { Check } from 'lucide-react';
+import { toast } from 'sonner';
+import { cn } from 'cn';
+import { setDesignAction } from '@/app/(app)/konto/actions';
+import { DESIGN_INFO, DESIGNS, type Design } from '@/lib/design';
+
+/** Switches the look right away and stores it in the cookie in the background. */
+function applyDesign(design: Design) {
+  const root = document.documentElement;
+  root.dataset.design = design;
+  root.classList.toggle('dark', DESIGN_INFO[design].dark);
+}
+
+export function DesignPicker({ current }: { current: Design }) {
+  const router = useRouter();
+  const [selected, setSelected] = useState<Design>(current);
+  const [, startTransition] = useTransition();
+
+  function choose(design: Design) {
+    const previous = selected;
+    setSelected(design);
+    applyDesign(design);
+
+    startTransition(async () => {
+      const result = await setDesignAction({ design });
+      if (!result.ok) {
+        setSelected(previous);
+        applyDesign(previous);
+        toast.error(result.error);
+        return;
+      }
+      router.refresh();
+    });
+  }
+
+  return (
+    <fieldset>
+      <legend className="sr-only">Design</legend>
+      <div className="grid gap-3 sm:grid-cols-2">
+        {DESIGNS.map((design) => {
+          const info = DESIGN_INFO[design];
+          const active = design === selected;
+          return (
+            <label
+              key={design}
+              className={cn(
+                'relative flex cursor-pointer items-center gap-3 rounded-lg border-[length:max(1px,var(--edge-w))] p-3 transition-colors',
+                'has-focus-visible:ring-3 has-focus-visible:ring-ring/50',
+                active ? 'border-primary bg-accent' : 'border-border hover:bg-muted/60',
+              )}
+            >
+              <input
+                type="radio"
+                name="design"
+                value={design}
+                checked={active}
+                onChange={() => choose(design)}
+                className="sr-only"
+              />
+              <span
+                aria-hidden
+                className="grid size-12 shrink-0 grid-cols-2 overflow-hidden rounded-md border border-black/15"
+              >
+                {info.swatch.map((color, index) => (
+                  <span key={index} style={{ backgroundColor: color }} />
+                ))}
+              </span>
+              <span className="min-w-0 flex-1">
+                <span className="block text-sm font-semibold">
+                  {info.label}
+                  {design === 'klemmbaustein' ? (
+                    <span className="font-normal text-muted-foreground"> · Standard</span>
+                  ) : null}
+                </span>
+                <span className="block text-xs text-muted-foreground">{info.description}</span>
+              </span>
+              {active ? <Check className="size-5 shrink-0 text-primary" aria-hidden /> : null}
+            </label>
+          );
+        })}
+      </div>
+    </fieldset>
+  );
+}
@@ -1,5 +1,5 @@
 import Link from 'next/link';
-import { Blocks } from 'lucide-react';
+import { BrickLogo } from '@/components/brick/logo';
 import { DesktopNav } from './bottom-nav';
 import { UserMenu } from './user-menu';
 import type { SessionUser } from '@/lib/session';
@@ -8,8 +8,11 @@ export function AppHeader({ user }: { user: SessionUser }) {
  return (
    <header className="sticky top-0 z-40 border-b border-border bg-background/95 backdrop-blur">
      <div className="mx-auto flex h-14 max-w-5xl items-center gap-3 px-4">
-        <Link href="/" className="flex items-center gap-2 font-semibold tracking-tight">
-          <Blocks className="size-5 text-primary" aria-hidden />
+        <Link
+          href="/"
+          className="flex items-center gap-2 text-lg font-bold tracking-tight [font-family:var(--font-display)]"
+        >
+          <BrickLogo className="h-6 w-7" />
          <span>Bricktrack</span>
        </Link>
        <div className="flex-1" />
@@ -18,7 +18,7 @@ export function BottomNav() {
  return (
    <nav
      aria-label="Hauptnavigation"
-      className="fixed inset-x-0 bottom-0 z-40 border-t border-border bg-background/95 pb-[env(safe-area-inset-bottom)] backdrop-blur md:hidden"
+      className="fixed inset-x-0 bottom-0 z-40 border-t-[length:max(1px,var(--edge-w))] border-border bg-card/95 pb-[env(safe-area-inset-bottom)] backdrop-blur md:hidden"
    >
      <ul className="mx-auto flex max-w-lg">
        {items.map((item) => {
@@ -30,10 +30,22 @@ export function BottomNav() {
                aria-current={active ? 'page' : undefined}
                className={cn(
                  'flex h-16 flex-col items-center justify-center gap-1 text-xs transition-colors',
-                  active ? 'text-primary' : 'text-muted-foreground hover:text-foreground',
+                  active
+                    ? 'font-bold text-foreground'
+                    : 'font-medium text-muted-foreground hover:text-foreground',
                )}
              >
-                <item.icon className="size-5" aria-hidden />
+                {/* The active tab sits on a small plate, like a tile on a baseplate. */}
+                <span
+                  className={cn(
+                    'flex h-7 w-12 items-center justify-center rounded-[calc(var(--radius)*0.6)] border-[length:var(--edge-w)]',
+                    active
+                      ? 'border-edge bg-secondary text-secondary-foreground'
+                      : 'border-transparent',
+                  )}
+                >
+                  <item.icon className="size-5" aria-hidden />
+                </span>
                {item.label}
              </Link>
            </li>
@@ -59,7 +71,7 @@ export function DesktopNav() {
            className={cn(
              'flex h-10 items-center gap-2 rounded-lg px-3 text-sm font-medium transition-colors',
              active
-                ? 'bg-muted text-foreground'
+                ? 'border-[length:var(--edge-w)] border-edge bg-secondary text-secondary-foreground'
                : 'text-muted-foreground hover:bg-muted/60 hover:text-foreground',
            )}
          >
@@ -1,10 +1,12 @@
 'use client';

 import { useEffect, useState, useTransition } from 'react';
-import { Check, ExternalLink, Gift, ImageOff, Loader2, Undo2 } from 'lucide-react';
+import { Check, ExternalLink, Gift, Loader2, Undo2 } from 'lucide-react';
 import { toast } from 'sonner';
 import { cancelReservation, reserveItem } from '@/app/w/actions';
 import { setImageSrc } from '@/lib/images';
+import { SetPlaceholder } from '@/components/brick/set-placeholder';
+import { Studs } from '@/components/brick/studs';
 import { formatEuro } from '@/lib/money';
 import { priorityLabel } from '@/lib/wishlist-logic';
 import { Badge } from '@/components/ui/badge';
@@ -125,90 +127,92 @@ export function PublicWishlist({
  }

  return (
-    <div className="space-y-3">
+    <div className="space-y-5 pt-2">
      {items.map((item) => {
        const image = setImageSrc(item);
        const mine = Boolean(tokens[item.id]);

        return (
-          <article
-            key={item.id}
-            className="flex gap-3 rounded-xl border border-border bg-card p-3"
-          >
-            <div className="size-20 shrink-0 overflow-hidden rounded-lg border border-border bg-muted sm:size-28">
-              {image ? (
-                // eslint-disable-next-line @next/next/no-img-element
-                <img src={image} alt="" loading="lazy" className="size-full object-contain" />
-              ) : (
-                <div className="flex size-full items-center justify-center text-muted-foreground">
-                  <ImageOff className="size-6" aria-hidden />
-                </div>
-              )}
-            </div>
-
-            <div className="min-w-0 flex-1 space-y-2">
-              <div>
-                <div className="flex flex-wrap items-center gap-1.5">
-                  <Badge variant="outline" className="font-mono text-xs">
-                    {item.setNumber}
-                  </Badge>
-                  <Badge variant="secondary">{item.manufacturerName}</Badge>
-                  {item.priority === 1 ? <Badge>{priorityLabel(1)}</Badge> : null}
-                </div>
-                <h2 className="mt-1 font-medium">{item.setName}</h2>
-                <p className="text-xs text-muted-foreground">
-                  {[
-                    item.themeName,
-                    item.year,
-                    item.pieceCount ? `${item.pieceCount} Teile` : null,
-                    item.retailPriceCents !== null ? formatEuro(item.retailPriceCents) : null,
-                  ]
-                    .filter(Boolean)
-                    .join(' · ')}
-                </p>
-                {item.note ? <p className="mt-1 text-sm">{item.note}</p> : null}
+          <article key={item.id} className="relative">
+            {/* Studs turn green once someone has taken the wish. */}
+            <Studs count={3} studClassName={mine || item.isReserved ? 'bg-owned' : undefined} />
+            <div className="brick flex gap-3 rounded-xl bg-card p-3">
+              <div className="size-20 shrink-0 overflow-hidden rounded-lg border-[length:max(1px,var(--edge-w))] border-edge bg-muted sm:size-28">
+                {image ? (
+                  // eslint-disable-next-line @next/next/no-img-element
+                  <img src={image} alt="" loading="lazy" className="size-full object-contain" />
+                ) : (
+                  <SetPlaceholder
+                    setNumber={item.setNumber}
+                    manufacturerName={item.manufacturerName}
+                  />
+                )}
              </div>

-              <div className="flex flex-wrap items-center gap-2">
-                {mine ? (
-                  <>
-                    <Badge className="gap-1 bg-emerald-600 text-white hover:bg-emerald-600">
-                      <Check className="size-3" aria-hidden />
-                      Das schenkst du
+              <div className="min-w-0 flex-1 space-y-2">
+                <div>
+                  <div className="flex flex-wrap items-center gap-1.5">
+                    <Badge variant="outline" className="font-mono text-xs">
+                      {item.setNumber}
                    </Badge>
-                    <Button variant="ghost" size="sm" onClick={() => undo(item)} disabled={pending}>
-                      <Undo2 />
-                      Doch nicht
-                    </Button>
-                  </>
-                ) : item.isReserved ? (
-                  <Badge variant="secondary">
-                    {item.reservedByName
-                      ? `Übernimmt ${item.reservedByName}`
-                      : 'Schon reserviert'}
-                  </Badge>
-                ) : (
-                  <Button
-                    size="sm"
-                    onClick={() => {
-                      setReserving(item);
-                      setCancelLink(null);
-                    }}
-                    disabled={pending}
-                  >
-                    <Gift />
-                    Das schenke ich
-                  </Button>
-                )}
+                    <Badge variant="secondary">{item.manufacturerName}</Badge>
+                    {item.priority === 1 ? <Badge>{priorityLabel(1)}</Badge> : null}
+                  </div>
+                  <h2 className="mt-1 font-medium">{item.setName}</h2>
+                  <p className="text-xs text-muted-foreground">
+                    {[
+                      item.themeName,
+                      item.year,
+                      item.pieceCount ? `${item.pieceCount} Teile` : null,
+                      item.retailPriceCents !== null ? formatEuro(item.retailPriceCents) : null,
+                    ]
+                      .filter(Boolean)
+                      .join(' · ')}
+                  </p>
+                  {item.note ? <p className="mt-1 text-sm">{item.note}</p> : null}
+                </div>

-                {item.manufacturerWebsite ? (
-                  <Button asChild variant="link" size="sm" className="px-0">
-                    <a href={item.manufacturerWebsite} target="_blank" rel="noreferrer noopener">
-                      Zum Shop
-                      <ExternalLink />
-                    </a>
-                  </Button>
-                ) : null}
+                <div className="flex flex-wrap items-center gap-2">
+                  {mine ? (
+                    <>
+                      <Badge className="gap-1 bg-owned text-owned-foreground">
+                        <Check className="size-3" aria-hidden />
+                        Das schenkst du
+                      </Badge>
+                      <Button variant="ghost" size="sm" onClick={() => undo(item)} disabled={pending}>
+                        <Undo2 />
+                        Doch nicht
+                      </Button>
+                    </>
+                  ) : item.isReserved ? (
+                    <Badge variant="secondary">
+                      {item.reservedByName
+                        ? `Übernimmt ${item.reservedByName}`
+                        : 'Schon reserviert'}
+                    </Badge>
+                  ) : (
+                    <Button
+                      size="sm"
+                      onClick={() => {
+                        setReserving(item);
+                        setCancelLink(null);
+                      }}
+                      disabled={pending}
+                    >
+                      <Gift />
+                      Das schenke ich
+                    </Button>
+                  )}
+
+                  {item.manufacturerWebsite ? (
+                    <Button asChild variant="link" size="sm" className="px-0">
+                      <a href={item.manufacturerWebsite} target="_blank" rel="noreferrer noopener">
+                        Zum Shop
+                        <ExternalLink />
+                      </a>
+                    </Button>
+                  ) : null}
+                </div>
              </div>
            </div>
          </article>
@@ -3,7 +3,8 @@
 import Link from 'next/link';
 import { useRouter } from 'next/navigation';
 import { useState, useTransition } from 'react';
-import { ArrowDown, ArrowUp, Check, ImageOff, Loader2, Trash2 } from 'lucide-react';
+import { ArrowDown, ArrowUp, Check, Loader2, Trash2 } from 'lucide-react';
+import { SetPlaceholder } from '@/components/brick/set-placeholder';
 import { toast } from 'sonner';
 import {
  removeWishlistItem,
@@ -122,15 +123,17 @@ export function WishlistItems({

            <Link
              href={`/katalog/${item.setId}`}
-              className="size-16 shrink-0 overflow-hidden rounded-lg border border-border bg-muted"
+              className="size-16 shrink-0 overflow-hidden rounded-lg border-[length:max(1px,var(--edge-w))] border-edge bg-muted"
            >
              {image ? (
                // eslint-disable-next-line @next/next/no-img-element
                <img src={image} alt="" loading="lazy" className="size-full object-contain" />
              ) : (
-                <div className="flex size-full items-center justify-center text-muted-foreground">
-                  <ImageOff className="size-5" aria-hidden />
-                </div>
+                <SetPlaceholder
+                  setNumber={item.setNumber}
+                  manufacturerName={item.manufacturerName}
+                  size="sm"
+                />
              )}
            </Link>

@@ -0,0 +1,48 @@
+/**
+ * The progress row on the dashboard: a fixed number of slots, filled with one
+ * brick per share of the catalog that is already in the collection. Each
+ * brick takes the colour of a collector, in proportion to what they own.
+ */
+
+export type BrickShare = { key: string; count: number };
+
+/**
+ * Returns `slots` entries: a collector key for a filled slot, `null` for an
+ * empty one. Filled slots come first, grouped by collector in input order.
+ */
+export function brickRow(
+  ownedSets: number,
+  totalSets: number,
+  shares: BrickShare[],
+  slots = 10,
+): Array<string | null> {
+  const empty = Array<string | null>(slots).fill(null);
+  if (totalSets <= 0 || ownedSets <= 0) return empty;
+
+  // Never round a non-empty collection down to an empty row, and only show a
+  // full row when everything is really there.
+  const ratio = Math.min(ownedSets, totalSets) / totalSets;
+  let filled = Math.round(ratio * slots);
+  filled = Math.max(1, filled);
+  if (ratio < 1) filled = Math.min(filled, slots - 1);
+
+  const positive = shares.filter((share) => share.count > 0);
+  const shareTotal = positive.reduce((sum, share) => sum + share.count, 0);
+  if (shareTotal === 0) return [...Array<string | null>(filled).fill(''), ...empty].slice(0, slots);
+
+  // Largest remainder: floor first, then hand out the rest by biggest fraction.
+  const exact = positive.map((share) => (share.count / shareTotal) * filled);
+  const counts = exact.map(Math.floor);
+  let rest = filled - counts.reduce((sum, value) => sum + value, 0);
+  const order = exact
+    .map((value, index) => ({ index, fraction: value - Math.floor(value) }))
+    .sort((a, b) => b.fraction - a.fraction || a.index - b.index);
+  for (const { index } of order) {
+    if (rest === 0) break;
+    counts[index]! += 1;
+    rest -= 1;
+  }
+
+  const row = positive.flatMap((share, index) => Array<string>(counts[index]!).fill(share.key));
+  return [...row, ...empty].slice(0, slots);
+}
@@ -0,0 +1,110 @@
+/**
+ * The selectable looks of the app.
+ *
+ * A design is nothing but a set of CSS tokens under `[data-design=...]` in
+ * `src/app/designs.css`; this module only knows the names. The choice lives in
+ * a cookie, so it is per device and also applies to pages without a session
+ * (login, public wishlist).
+ */
+
+export const DESIGNS = ['klemmbaustein', 'warm', 'nacht', 'bonbon', 'bauklotz', 'schlicht'] as const;
+
+export type Design = (typeof DESIGNS)[number];
+
+export const DEFAULT_DESIGN: Design = 'klemmbaustein';
+
+export const DESIGN_COOKIE = 'bricktrack-design';
+
+export type DesignInfo = {
+  label: string;
+  description: string;
+  /** Dark designs also set the `.dark` class so `dark:` variants apply. */
+  dark: boolean;
+  /** Browser chrome colour (address bar, PWA title bar). */
+  themeColor: string;
+  /** Four colours for the preview swatch on the account page. */
+  swatch: [string, string, string, string];
+};
+
+export const DESIGN_INFO: Record<Design, DesignInfo> = {
+  klemmbaustein: {
+    label: 'Klemmbaustein',
+    description: 'Noppen, Konturen und kräftige Steinfarben.',
+    dark: false,
+    themeColor: '#fff6e5',
+    swatch: ['#fff6e5', '#d63a30', '#ffc93c', '#2f6bea'],
+  },
+  warm: {
+    label: 'Warm',
+    description: 'Ruhiger Sandton mit Ziegelrot.',
+    dark: false,
+    themeColor: '#f6f3ec',
+    swatch: ['#f6f3ec', '#c8381f', '#fbe3a6', '#1d1b17'],
+  },
+  nacht: {
+    label: 'Nachtblau',
+    description: 'Dunkel mit gelbem Akzent, schont abends die Augen.',
+    dark: true,
+    themeColor: '#0e1422',
+    swatch: ['#0e1422', '#ffc93c', '#182136', '#60a5fa'],
+  },
+  bonbon: {
+    label: 'Bonbon',
+    description: 'Weiches Lila mit Pastellfarben.',
+    dark: false,
+    themeColor: '#f4f0ff',
+    swatch: ['#f4f0ff', '#6d4aff', '#d3f5e7', '#ffe1d1'],
+  },
+  bauklotz: {
+    label: 'Bauklotz',
+    description: 'Primärfarben und dicke schwarze Konturen.',
+    dark: false,
+    themeColor: '#ffd500',
+    swatch: ['#fffbef', '#1e5eff', '#ffd500', '#e63b2e'],
+  },
+  schlicht: {
+    label: 'Schlicht',
+    description: 'Neutrales Grau, wie bis Version 0.3.',
+    dark: false,
+    themeColor: '#ffffff',
+    swatch: ['#ffffff', '#171717', '#f5f5f5', '#a3a3a3'],
+  },
+};
+
+export function isDesign(value: unknown): value is Design {
+  return typeof value === 'string' && (DESIGNS as readonly string[]).includes(value);
+}
+
+/** Cookie value to design; anything unknown falls back to the default. */
+export function resolveDesign(value: string | null | undefined): Design {
+  return isDesign(value) ? value : DEFAULT_DESIGN;
+}
+
+/** Number of placeholder tones every design defines (`--tone-1` ...). */
+export const TONE_COUNT = 5;
+
+/** The manufacturers named in the brief get a fixed, recognisable tone. */
+const KNOWN_TONES: Record<string, number> = {
+  lego: 1,
+  playmobil: 2,
+  cobi: 3,
+  bluebrixx: 4,
+  megabloks: 5,
+};
+
+/**
+ * Stable tone for a set without an image, derived from its manufacturer, so
+ * all Lego placeholders share a colour and Playmobil gets another one.
+ * Returns 1 ... TONE_COUNT.
+ */
+export function toneIndex(manufacturerName: string): number {
+  const key = manufacturerName.toLowerCase().replace(/[^a-z0-9]/g, '');
+  const known = KNOWN_TONES[key];
+  if (known) return known;
+
+  let hash = 0;
+  for (const char of key) {
+    hash = (hash * 31 + char.codePointAt(0)!) >>> 0;
+  }
+  return (hash % TONE_COUNT) + 1;
+}
@@ -0,0 +1,380 @@
+import { isValidEan, normalizeEan } from './ean';
+
+/**
+ * Reads set data out of a pasted link and, where the page can be fetched, out
+ * of its structured data (schema.org JSON-LD, Open Graph).
+ *
+ * Pure: no network, no database. The server action in katalog/link-actions.ts
+ * does the fetching and decides what to trust.
+ */
+
+export type LinkHints = {
+  manufacturer?: string;
+  setNumber?: string;
+  name?: string;
+  ean?: string;
+  imageUrl?: string;
+  pieceCount?: number;
+  year?: number;
+};
+
+/** Brands we recognise in links and page data, with how we spell them. */
+const BRANDS: Array<{ name: string; aliases: string[] }> = [
+  { name: 'Lego', aliases: ['lego'] },
+  { name: 'Playmobil', aliases: ['playmobil'] },
+  { name: 'Cobi', aliases: ['cobi'] },
+  { name: 'BlueBrixx', aliases: ['bluebrixx', 'bluebrixxpro', 'bb'] },
+  { name: 'Mega Bloks', aliases: ['megabloks', 'megaconstrux', 'mega'] },
+  { name: 'Mould King', aliases: ['mouldking'] },
+  { name: 'Cada', aliases: ['cada'] },
+  { name: 'Sluban', aliases: ['sluban'] },
+  { name: 'Qman', aliases: ['qman', 'keeppley'] },
+  { name: 'Xingbao', aliases: ['xingbao'] },
+];
+
+function key(value: string): string {
+  return value.toLowerCase().replace(/[^a-z0-9]/g, '');
+}
+
+/** "LEGO®", "lego", "BlueBrixx Pro" -> "Lego", "BlueBrixx". */
+export function canonicalBrand(value: string | undefined | null): string | undefined {
+  if (!value) return undefined;
+  const wanted = key(value);
+  if (!wanted) return undefined;
+  for (const brand of BRANDS) {
+    if (brand.aliases.some((alias) => wanted === alias || (alias.length > 3 && wanted.startsWith(alias)))) {
+      return brand.name;
+    }
+  }
+  return undefined;
+}
+
+/** Where a link points, in words for the UI. */
+export function sourceLabel(url: URL): string {
+  const host = url.hostname.replace(/^www\./, '');
+  if (/(^|\.)amazon\./.test(host) || /^amzn\./.test(host)) return 'Amazon';
+  if (/(^|\.)idealo\./.test(host)) return 'idealo';
+  if (/(^|\.)geizhals\./.test(host)) return 'geizhals';
+  if (/(^|\.)brickmerge\./.test(host)) return 'brickmerge';
+  if (/(^|\.)brickfact\./.test(host)) return 'Brickfact';
+  if (/(^|\.)merlinsbricks\./.test(host)) return 'Merlins Bricks';
+  if (/(^|\.)ebay\./.test(host)) return 'eBay';
+  return host;
+}
+
+// Words that sit in shop slugs but never in a set name.
+const STOPWORDS = new Set([
+  'set', 'sets', 'bausatz', 'bausteine', 'klemmbausteine', 'baustein', 'spielzeug', 'spielset',
+  'kinder', 'jungen', 'maedchen', 'mädchen', 'ab', 'jahre', 'jahren', 'jahr', 'teile', 'teilig',
+  'geschenk', 'geschenkidee', 'the', 'and', 'for', 'kids', 'boys',
+  'girls', 'toy', 'toys', 'building', 'kit', 'bricks', 'brick', 'preisvergleich', 'dp', 'html',
+  'neu', 'ovp', 'new', 'sealed',
+]);
+
+const KEEP_LOWER = new Set(['und', 'mit', 'der', 'die', 'das', 'von', 'im', 'am', 'zum', 'zur']);
+
+function looksLikeYear(value: string): boolean {
+  const year = Number(value);
+  return year >= 1950 && year <= 2040;
+}
+
+/**
+ * A set number in a list of slug tokens: 4 to 7 digits, longer ones first,
+ * and four-digit years only as a last resort. Cobi's "2-30500" style is kept.
+ */
+function findSetNumber(tokens: string[]): string | undefined {
+  const joined = tokens.join('-');
+  const cobi = /(?:^|-)(\d-\d{5})(?:-|$)/.exec(joined);
+  if (cobi) return cobi[1];
+
+  const numbers = tokens.filter((token) => /^\d{4,7}$/.test(token));
+  const best =
+    numbers.find((token) => token.length >= 5) ?? numbers.find((token) => !looksLikeYear(token));
+  return best;
+}
+
+function titleCase(word: string): string {
+  if (KEEP_LOWER.has(word)) return word;
+  return word.charAt(0).toUpperCase() + word.slice(1);
+}
+
+/** The descriptive part of a shop URL, split into words. */
+function slugTokens(url: URL): string[] {
+  const segments = decodeURIComponent(url.pathname)
+    .split('/')
+    .filter(Boolean)
+    .map((segment) => segment.replace(/\.html?$/i, ''));
+
+  let slug = '';
+  const host = url.hostname;
+
+  if (/amazon\./.test(host)) {
+    // amazon.de/LEGO-60398-Familienhaus-Elektroauto/dp/B0...: the part before /dp/.
+    const dp = segments.findIndex((segment) => segment === 'dp' || segment === 'gp');
+    slug = dp > 0 ? segments[dp - 1]! : '';
+  } else if (/idealo\./.test(host)) {
+    // .../OffersOfProduct/202595377_-familienhaus-mit-elektroauto-60398-lego
+    slug = (segments.at(-1) ?? '').replace(/^\d+_-?/, '');
+  } else if (/geizhals\./.test(host)) {
+    // geizhals.de/lego-city-familienhaus-...-60398-a2875000
+    slug = (segments.at(-1) ?? '').replace(/-a\d+$/, '');
+  } else {
+    // Generic: the longest segment with dashes is usually the product slug.
+    slug = [...segments].sort((a, b) => b.split(/[-_]/).length - a.split(/[-_]/).length)[0] ?? '';
+  }
+
+  return slug
+    .toLowerCase()
+    .split(/[-_+\s]+/)
+    .map((token) => token.replace(/[^\p{L}\p{N}]/gu, ''))
+    .filter(Boolean);
+}
+
+/** Everything the address alone tells us - useful when the page blocks us. */
+export function hintsFromUrl(url: URL): LinkHints {
+  const host = url.hostname.replace(/^www\./, '');
+
+  // merlinsbricks.com/sets/bb-108782, /sets/cobi-2400: brand and number in one.
+  const merlin = /merlinsbricks\./.test(host)
+    ? /\/sets\/([a-z]+)-([\w-]+?)\/?$/i.exec(url.pathname)
+    : null;
+  if (merlin) {
+    return { manufacturer: canonicalBrand(merlin[1]), setNumber: merlin[2] };
+  }
+
+  const tokens = slugTokens(url);
+  const setNumber = findSetNumber(tokens);
+
+  let manufacturer: string | undefined;
+  for (const token of tokens) {
+    manufacturer = canonicalBrand(token);
+    if (manufacturer) break;
+  }
+  manufacturer ??= canonicalBrand(host.split('.').at(-2));
+
+  const words = tokens.filter(
+    (token) =>
+      token !== setNumber &&
+      !/^\d+$/.test(token) &&
+      !STOPWORDS.has(token) &&
+      !canonicalBrand(token) &&
+      token.length > 1,
+  );
+  const name = words.length > 0 ? words.slice(0, 8).map(titleCase).join(' ') : undefined;
+
+  return { manufacturer, setNumber, name };
+}
+
+// --- page data ------------------------------------------------------------
+
+const ENTITIES: Record<string, string> = {
+  amp: '&', lt: '<', gt: '>', quot: '"', apos: "'", nbsp: ' ', '#39': "'",
+  auml: 'ä', ouml: 'ö', uuml: 'ü', Auml: 'Ä', Ouml: 'Ö', Uuml: 'Ü', szlig: 'ß',
+};
+
+function decodeEntities(value: string): string {
+  return value
+    .replace(/&#(\d+);/g, (_, code: string) => String.fromCodePoint(Number(code)))
+    .replace(/&#x([\da-f]+);/gi, (_, code: string) => String.fromCodePoint(parseInt(code, 16)))
+    .replace(/&([a-z]+|#39);/gi, (match, name: string) => ENTITIES[name] ?? match);
+}
+
+function metaContent(html: string, property: string): string | undefined {
+  const escaped = property.replace(/[.:]/g, '\\$&');
+  const pattern = new RegExp(
+    `<meta[^>]+(?:property|name)=["']${escaped}["'][^>]*content=["']([^"']*)["']|<meta[^>]+content=["']([^"']*)["'][^>]*(?:property|name)=["']${escaped}["']`,
+    'i',
+  );
+  const match = pattern.exec(html);
+  const value = match?.[1] ?? match?.[2];
+  return value ? decodeEntities(value).trim() : undefined;
+}
+
+type JsonObject = Record<string, unknown>;
+
+function isObject(value: unknown): value is JsonObject {
+  return typeof value === 'object' && value !== null && !Array.isArray(value);
+}
+
+/** All schema.org Product objects on the page, however they are nested. */
+function jsonLdProducts(html: string): JsonObject[] {
+  const products: JsonObject[] = [];
+  const pattern = /<script[^>]+application\/ld\+json[^>]*>([\s\S]*?)<\/script>/gi;
+
+  const visit = (node: unknown) => {
+    if (Array.isArray(node)) return node.forEach(visit);
+    if (!isObject(node)) return;
+    const type = node['@type'];
+    const types = Array.isArray(type) ? type : [type];
+    if (types.includes('Product') || types.includes('ProductGroup')) products.push(node);
+    if (node['@graph']) visit(node['@graph']);
+  };
+
+  for (const match of html.matchAll(pattern)) {
+    try {
+      visit(JSON.parse(match[1]!.trim()));
+    } catch {
+      // A broken block on someone else's page is not our problem.
+    }
+  }
+  return products;
+}
+
+function text(value: unknown): string | undefined {
+  if (typeof value === 'string') return decodeEntities(value).trim() || undefined;
+  if (typeof value === 'number') return String(value);
+  if (isObject(value)) return text(value.name) ?? text(value.url);
+  if (Array.isArray(value)) return text(value[0]);
+  return undefined;
+}
+
+function cleanEan(value: unknown): string | undefined {
+  const raw = text(value);
+  if (!raw) return undefined;
+  const ean = normalizeEan(raw);
+  return isValidEan(ean) ? ean : undefined;
+}
+
+function absoluteUrl(value: string | undefined, base: URL): string | undefined {
+  if (!value) return undefined;
+  try {
+    const url = new URL(value, base);
+    return url.protocol === 'https:' || url.protocol === 'http:' ? url.toString() : undefined;
+  } catch {
+    return undefined;
+  }
+}
+
+/** "462 Teile", "450 pieces" in a description. */
+function piecesFrom(value: string | undefined): number | undefined {
+  const match = value && /(\d{1,3}(?:[.,]\d{3})*|\d+)\s*(?:teilen?|pieces|pcs|steinen?|bausteinen?|parts)\b/i.exec(value);
+  if (!match) return undefined;
+  const pieces = Number(match[1]!.replace(/[.,]/g, ''));
+  return pieces > 0 && pieces < 100_000 ? pieces : undefined;
+}
+
+/** "from 2025", "aus 2023", "Jahr: 2021" in a description. */
+function yearFrom(value: string | undefined): number | undefined {
+  const match = value && /\b(?:from|aus|jahr:?|released|erschienen)\s+((?:19|20)\d{2})\b/i.exec(value);
+  return match ? Number(match[1]) : undefined;
+}
+
+function stripTags(value: string): string {
+  return decodeEntities(value.replace(/<[^>]+>/g, ' '))
+    .replace(/[‎‏]/g, '')
+    .replace(/\s+/g, ' ')
+    .trim();
+}
+
+/**
+ * Amazon has no schema.org data, but a stable page skeleton: the title in
+ * #productTitle, the brand in the byline, pictures as "hiRes" in a script and
+ * the facts in the "Produktinformation" table or bullet list.
+ */
+function hintsFromAmazon(html: string): LinkHints {
+  const facts = new Map<string, string>();
+  for (const match of html.matchAll(/<th[^>]*>([\s\S]*?)<\/th>\s*<td[^>]*>([\s\S]*?)<\/td>/gi)) {
+    facts.set(stripTags(match[1]!).toLowerCase(), stripTags(match[2]!));
+  }
+  for (const match of html.matchAll(
+    /<span class="a-text-bold">([\s\S]*?)<\/span>\s*<span[^>]*>([\s\S]*?)<\/span>/gi,
+  )) {
+    facts.set(stripTags(match[1]!).replace(/[:\s]+$/, '').toLowerCase(), stripTags(match[2]!));
+  }
+  const fact = (...labels: string[]) => {
+    for (const [label, value] of facts) {
+      if (labels.some((wanted) => label.includes(wanted))) return value;
+    }
+    return undefined;
+  };
+
+  const title = /id="productTitle"[^>]*>([\s\S]*?)<\/span>/i.exec(html);
+  const byline = /id="bylineInfo"[^>]*>([\s\S]*?)<\/a>/i.exec(html);
+  const brandText = byline
+    ? stripTags(byline[1]!).replace(/^(marke|brand):\s*/i, '').replace(/^besuche den\s+|-store$|\s+store$/gi, '')
+    : fact('marke', 'hersteller');
+  const image = /"hiRes":"(https:[^"]+)"/.exec(html) ?? /data-old-hires="(https:[^"]+)"/.exec(html);
+  const pieces = Number((fact('anzahl der teile', 'teileanzahl', 'anzahl teile') ?? '').replace(/\D/g, ''));
+
+  return {
+    manufacturer: canonicalBrand(brandText),
+    setNumber: fact('modellnummer', 'herstellerreferenz')?.replace(/\s/g, ''),
+    name: title ? stripTags(title[1]!) : undefined,
+    ean: cleanEan(fact('ean', 'gtin')),
+    imageUrl: image?.[1],
+    pieceCount: pieces > 0 && pieces < 100_000 ? pieces : undefined,
+  };
+}
+
+export function hintsFromHtml(html: string, pageUrl: URL): LinkHints {
+  const hints = /(^|\.)amazon\./.test(pageUrl.hostname) ? hintsFromAmazon(html) : hintsFromStructuredData(html, pageUrl);
+
+  // A shop's own article number (an ASIN, a long SKU) is not a set number.
+  if (hints.setNumber && !/^[\d-]{3,12}$/.test(hints.setNumber)) delete hints.setNumber;
+
+  // Titles usually carry the number: "LEGO City 60398 Familienhaus".
+  if (!hints.setNumber && hints.name) {
+    const fromName = findSetNumber(hints.name.toLowerCase().split(/[\s()[\]:,/|]+/).filter(Boolean));
+    if (fromName) hints.setNumber = fromName;
+  }
+  return hints;
+}
+
+function hintsFromStructuredData(html: string, pageUrl: URL): LinkHints {
+  const product = jsonLdProducts(html)[0];
+  const description = text(product?.description) ?? metaContent(html, 'og:description');
+
+  const hints: LinkHints = {
+    manufacturer: canonicalBrand(text(product?.brand)) ?? canonicalBrand(metaContent(html, 'product:brand')),
+    setNumber: text(product?.mpn) ?? text(product?.sku),
+    name: text(product?.name) ?? metaContent(html, 'og:title'),
+    ean: cleanEan(product?.gtin13) ?? cleanEan(product?.gtin) ?? cleanEan(product?.gtin12) ?? cleanEan(product?.gtin8),
+    imageUrl: absoluteUrl(text(product?.image) ?? metaContent(html, 'og:image'), pageUrl),
+    pieceCount: piecesFrom(description),
+    year: yearFrom(description),
+  };
+  return hints;
+}
+
+/** First value wins per field: pass the most trusted source first. */
+export function mergeHints(...sources: Array<LinkHints | null | undefined>): LinkHints {
+  const merged: LinkHints = {};
+  for (const source of sources) {
+    if (!source) continue;
+    for (const [field, value] of Object.entries(source) as Array<[keyof LinkHints, never]>) {
+      if (merged[field] === undefined && value !== undefined && value !== '') merged[field] = value;
+    }
+  }
+  return merged;
+}
+
+/**
+ * Shop titles carry everything: "LEGO® City Familienhaus mit Elektroauto
+ * 60398", "BlueBrixx - Technisches Hilfswerk™ Vehicle | Set 108782". Keeps
+ * the part that is the set's own name.
+ */
+export function cleanSetName(name: string, manufacturer?: string, setNumber?: string): string {
+  let result = name.replace(/[®™©]/g, '');
+
+  // Site names and set references after a separator.
+  result = result.split(/\s+[|•·]\s+/)[0]!;
+
+  // Price-comparison titles: "... ab € 4,20 (2026)", "... ab 52,99 €".
+  result = result.replace(/\s+ab\s+(?:€\s*)?\d[\d.,]*\s*(?:€|EUR)?.*$/i, '');
+
+  if (setNumber) {
+    const escaped = setNumber.replace(/[-]/g, '\\-');
+    result = result.replace(new RegExp(`\\(?\\b${escaped}\\b\\)?`, 'g'), '');
+  }
+
+  if (manufacturer) {
+    for (const brand of BRANDS.filter((entry) => entry.name === manufacturer)) {
+      for (const alias of [brand.name, ...brand.aliases]) {
+        if (alias.length < 3) continue;
+        result = result.replace(new RegExp(`^\\s*${alias}\\b\\s*[-–:]?\\s*`, 'i'), '');
+      }
+    }
+  }
+
+  return result.replace(/\s{2,}/g, ' ').replace(/^[\s\-–:]+|[\s\-–:,]+$/g, '').trim();
+}
@@ -0,0 +1,66 @@
+import { BlockList, isIP } from 'node:net';
+
+/**
+ * Which addresses the server may fetch on a user's behalf.
+ *
+ * The link import downloads pages and pictures from URLs people paste. Without
+ * a guard, a link to http://192.168.1.1/ would make the server talk to the
+ * router - or to any other device in the home network. Only public unicast
+ * addresses pass. Pure, so it is unit tested.
+ */
+
+const blocked = new BlockList();
+
+for (const [network, prefix] of [
+  ['0.0.0.0', 8], // "this" network
+  ['10.0.0.0', 8], // private
+  ['100.64.0.0', 10], // carrier-grade NAT
+  ['127.0.0.0', 8], // loopback
+  ['169.254.0.0', 16], // link-local, cloud metadata
+  ['172.16.0.0', 12], // private
+  ['192.0.0.0', 24], // IETF protocol assignments
+  ['192.0.2.0', 24], // documentation
+  ['192.168.0.0', 16], // private
+  ['198.18.0.0', 15], // benchmarking
+  ['198.51.100.0', 24], // documentation
+  ['203.0.113.0', 24], // documentation
+  ['224.0.0.0', 4], // multicast
+  ['240.0.0.0', 4], // reserved, broadcast
+] as const) {
+  blocked.addSubnet(network, prefix, 'ipv4');
+}
+
+for (const [network, prefix] of [
+  ['::', 128], // unspecified
+  ['::1', 128], // loopback
+  ['64:ff9b::', 96], // NAT64 - would reach IPv4 space behind it
+  ['100::', 64], // discard
+  ['2001:db8::', 32], // documentation
+  ['fc00::', 7], // unique local
+  ['fe80::', 10], // link-local
+  ['ff00::', 8], // multicast
+] as const) {
+  blocked.addSubnet(network, prefix, 'ipv6');
+}
+
+export function isPublicAddress(address: string): boolean {
+  const version = isIP(address);
+  if (version === 0) return false;
+
+  if (version === 6) {
+    // An IPv4 address in IPv6 clothing is judged as what it really is.
+    const mapped = /^::ffff:(\d+\.\d+\.\d+\.\d+)$/i.exec(address);
+    if (mapped) return isPublicAddress(mapped[1]!);
+    return !blocked.check(address, 'ipv6');
+  }
+
+  return !blocked.check(address, 'ipv4');
+}
+
+/** Only plain web URLs on the standard ports; no credentials in the URL. */
+export function isAllowedWebUrl(url: URL): boolean {
+  if (url.protocol !== 'https:' && url.protocol !== 'http:') return false;
+  if (url.username || url.password) return false;
+  if (url.port && url.port !== '80' && url.port !== '443') return false;
+  return true;
+}
@@ -0,0 +1,167 @@
+import 'server-only';
+import { lookup as dnsLookup, type LookupAddress } from 'node:dns';
+import http from 'node:http';
+import https from 'node:https';
+import { isIP, type LookupFunction } from 'node:net';
+import { Readable } from 'node:stream';
+import zlib from 'node:zlib';
+import { isAllowedWebUrl, isPublicAddress } from './net-guard';
+
+/**
+ * Fetches a URL a user pasted - and nothing else.
+ *
+ * - Every hostname is resolved first and refused if any of its addresses is
+ *   not public (see net-guard.ts). The check happens inside the socket's DNS
+ *   lookup, so a second resolution cannot swap in a private address.
+ * - Redirects are followed by hand, and every hop passes the same checks.
+ * - Size and time are capped, compressed bodies included.
+ */
+
+export class SafeFetchError extends Error {}
+
+export type SafeResponse = {
+  status: number;
+  url: string;
+  contentType: string;
+  body: Buffer;
+};
+
+type Options = {
+  maxBytes?: number;
+  timeoutMs?: number;
+  accept?: string;
+};
+
+const MAX_REDIRECTS = 4;
+
+// A regular browser identity: some shops answer anything else with an error
+// page. It is one request per paste, the same a browser preview would make.
+const USER_AGENT =
+  'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0 Safari/537.36';
+
+const guardedLookup = ((
+  hostname: string,
+  options: { all?: boolean; family?: number },
+  callback: (error: Error | null, address: string | LookupAddress[], family?: number) => void,
+) => {
+  dnsLookup(hostname, { family: options.family ?? 0, all: true }, (error, addresses) => {
+    if (error) return callback(error, '', 4);
+    if (addresses.length === 0 || addresses.some((entry) => !isPublicAddress(entry.address))) {
+      return callback(new SafeFetchError(`${hostname} zeigt auf eine interne Adresse.`), '', 4);
+    }
+    if (options.all) return callback(null, addresses);
+    callback(null, addresses[0]!.address, addresses[0]!.family);
+  });
+}) as unknown as LookupFunction;
+
+function checkUrl(url: URL) {
+  if (!isAllowedWebUrl(url)) throw new SafeFetchError('Nur normale http- und https-Links.');
+
+  // Literal IPs never reach the DNS lookup, so they are checked here.
+  const host = url.hostname.replace(/^\[|\]$/g, '');
+  if (isIP(host) && !isPublicAddress(host)) {
+    throw new SafeFetchError('Interne Adressen werden nicht abgerufen.');
+  }
+}
+
+function decode(response: http.IncomingMessage): Readable {
+  switch ((response.headers['content-encoding'] ?? '').toLowerCase()) {
+    case 'gzip':
+    case 'x-gzip':
+      return response.pipe(zlib.createGunzip());
+    case 'deflate':
+      return response.pipe(zlib.createInflate());
+    case 'br':
+      return response.pipe(zlib.createBrotliDecompress());
+    default:
+      return response;
+  }
+}
+
+function requestOnce(url: URL, options: Required<Options>, signal: AbortSignal) {
+  return new Promise<{ status: number; location: string | null; contentType: string; body: Buffer }>(
+    (resolve, reject) => {
+      const client = url.protocol === 'https:' ? https : http;
+      const request = client.get(
+        url,
+        {
+          lookup: guardedLookup,
+          signal,
+          headers: {
+            'user-agent': USER_AGENT,
+            accept: options.accept,
+            'accept-language': 'de-DE,de;q=0.9,en;q=0.6',
+            'accept-encoding': 'gzip, deflate, br',
+          },
+        },
+        (response) => {
+          const status = response.statusCode ?? 0;
+          const location = response.headers.location ?? null;
+          const contentType = response.headers['content-type'] ?? '';
+
+          if (status >= 300 && status < 400 && location) {
+            response.resume();
+            resolve({ status, location, contentType, body: Buffer.alloc(0) });
+            return;
+          }
+
+          const chunks: Buffer[] = [];
+          let size = 0;
+          const stream = decode(response);
+          stream.on('data', (chunk: Buffer) => {
+            size += chunk.byteLength;
+            if (size > options.maxBytes) {
+              request.destroy();
+              stream.destroy();
+              reject(new SafeFetchError('Die Seite ist zu groß.'));
+              return;
+            }
+            chunks.push(chunk);
+          });
+          stream.on('end', () =>
+            resolve({ status, location: null, contentType, body: Buffer.concat(chunks) }),
+          );
+          stream.on('error', reject);
+        },
+      );
+      request.on('error', reject);
+    },
+  );
+}
+
+export async function safeFetch(rawUrl: string | URL, options: Options = {}): Promise<SafeResponse> {
+  const settings: Required<Options> = {
+    maxBytes: options.maxBytes ?? 3 * 1024 * 1024,
+    timeoutMs: options.timeoutMs ?? 10_000,
+    accept: options.accept ?? 'text/html,application/xhtml+xml;q=0.9,*/*;q=0.5',
+  };
+  const signal = AbortSignal.timeout(settings.timeoutMs);
+
+  let url = new URL(rawUrl);
+  for (let hop = 0; hop <= MAX_REDIRECTS; hop += 1) {
+    checkUrl(url);
+
+    let result;
+    try {
+      result = await requestOnce(url, settings, signal);
+    } catch (error) {
+      if (error instanceof SafeFetchError) throw error;
+      if (signal.aborted) throw new SafeFetchError('Die Seite hat zu lange gebraucht.');
+      throw new SafeFetchError('Die Seite war nicht erreichbar.');
+    }
+
+    if (result.location) {
+      url = new URL(result.location, url);
+      continue;
+    }
+
+    return {
+      status: result.status,
+      url: url.toString(),
+      contentType: result.contentType,
+      body: result.body,
+    };
+  }
+
+  throw new SafeFetchError('Zu viele Weiterleitungen.');
+}
@@ -0,0 +1,80 @@
+import { describe, expect, it } from 'vitest';
+import { brickRow } from '@/lib/brick-row';
+import { DEFAULT_DESIGN, DESIGNS, DESIGN_INFO, resolveDesign, TONE_COUNT, toneIndex } from '@/lib/design';
+
+describe('Design aus dem Cookie', () => {
+  it('nimmt ein bekanntes Design', () => {
+    expect(resolveDesign('nacht')).toBe('nacht');
+    expect(resolveDesign('schlicht')).toBe('schlicht');
+  });
+
+  it('faellt bei Unbekanntem auf Klemmbaustein zurueck', () => {
+    expect(DEFAULT_DESIGN).toBe('klemmbaustein');
+    expect(resolveDesign(undefined)).toBe('klemmbaustein');
+    expect(resolveDesign('')).toBe('klemmbaustein');
+    expect(resolveDesign('"><script>')).toBe('klemmbaustein');
+  });
+
+  it('beschreibt jedes Design', () => {
+    for (const design of DESIGNS) {
+      expect(DESIGN_INFO[design].label.length).toBeGreaterThan(0);
+      expect(DESIGN_INFO[design].themeColor).toMatch(/^#[0-9a-f]{6}$/);
+    }
+    expect(DESIGNS.filter((design) => DESIGN_INFO[design].dark)).toEqual(['nacht']);
+  });
+});
+
+describe('Farbton fuer Sets ohne Bild', () => {
+  it('gibt den bekannten Herstellern feste, verschiedene Toene', () => {
+    const tones = ['Lego', 'Playmobil', 'Cobi', 'BlueBrixx', 'Mega Bloks'].map(toneIndex);
+    expect(new Set(tones).size).toBe(5);
+    expect(toneIndex('Lego')).toBe(1);
+    expect(toneIndex('LEGO')).toBe(1);
+  });
+
+  it('bleibt fuer andere Hersteller stabil und im Bereich', () => {
+    expect(toneIndex('Sluban')).toBe(toneIndex('Sluban'));
+    for (const name of ['Sluban', 'Qman', 'Wange', '', 'Ölfabrik']) {
+      const tone = toneIndex(name);
+      expect(tone).toBeGreaterThanOrEqual(1);
+      expect(tone).toBeLessThanOrEqual(TONE_COUNT);
+    }
+  });
+});
+
+describe('Steinreihe auf der Startseite', () => {
+  it('ist leer ohne Katalog oder ohne Sammlung', () => {
+    expect(brickRow(0, 10, [])).toEqual(Array(10).fill(null));
+    expect(brickRow(3, 0, [])).toEqual(Array(10).fill(null));
+  });
+
+  it('verteilt die Steine nach Anteil auf die Sammler', () => {
+    const row = brickRow(4, 10, [
+      { key: 'max', count: 2 },
+      { key: 'mia', count: 2 },
+    ]);
+    expect(row).toEqual(['max', 'max', 'mia', 'mia', null, null, null, null, null, null]);
+  });
+
+  it('zeigt mindestens einen Stein, aber nie eine volle Reihe vor dem Ziel', () => {
+    expect(brickRow(1, 500, [{ key: 'max', count: 1 }]).filter(Boolean)).toHaveLength(1);
+    expect(brickRow(499, 500, [{ key: 'max', count: 499 }]).filter(Boolean)).toHaveLength(9);
+    expect(brickRow(500, 500, [{ key: 'max', count: 500 }]).filter(Boolean)).toHaveLength(10);
+  });
+
+  it('vergibt Reststeine nach dem groessten Bruchteil', () => {
+    const row = brickRow(10, 20, [
+      { key: 'a', count: 1 },
+      { key: 'b', count: 1 },
+      { key: 'c', count: 1 },
+    ]);
+    // 5 Steine auf drei gleiche Anteile: 2, 2, 1 - die vorderen zuerst.
+    expect(row.filter((key) => key === 'a')).toHaveLength(2);
+    expect(row.filter((key) => key === 'b')).toHaveLength(2);
+    expect(row.filter((key) => key === 'c')).toHaveLength(1);
+  });
+
+  it('fuellt ohne Sammler-Zuordnung neutral', () => {
+    expect(brickRow(5, 10, []).slice(0, 5)).toEqual(['', '', '', '', '']);
+  });
+});
@@ -0,0 +1,209 @@
+import { describe, expect, it } from 'vitest';
+import {
+  canonicalBrand,
+  cleanSetName,
+  hintsFromHtml,
+  hintsFromUrl,
+  mergeHints,
+  sourceLabel,
+} from '@/lib/link-import';
+import { isAllowedWebUrl, isPublicAddress } from '@/lib/net-guard';
+
+describe('Hersteller erkennen', () => {
+  it('kennt die gaengigen Schreibweisen', () => {
+    expect(canonicalBrand('LEGO®')).toBe('Lego');
+    expect(canonicalBrand('Blue Brixx')).toBe('BlueBrixx');
+    expect(canonicalBrand('BlueBrixx Pro')).toBe('BlueBrixx');
+    expect(canonicalBrand('Mega Construx')).toBe('Mega Bloks');
+    expect(canonicalBrand('COBI')).toBe('Cobi');
+  });
+
+  it('raet nicht bei Unbekanntem', () => {
+    expect(canonicalBrand('Ravensburger')).toBeUndefined();
+    expect(canonicalBrand('')).toBeUndefined();
+    expect(canonicalBrand('legoland')).toBe('Lego');
+  });
+});
+
+describe('Daten aus dem Link', () => {
+  it('liest Amazon-Links mit Produktnamen', () => {
+    const url = new URL(
+      'https://www.amazon.de/LEGO-60398-Familienhaus-Elektroauto-Spielzeug/dp/B0BYZJXGZQ/ref=sr_1_1?keywords=lego',
+    );
+    expect(sourceLabel(url)).toBe('Amazon');
+    expect(hintsFromUrl(url)).toEqual({
+      manufacturer: 'Lego',
+      setNumber: '60398',
+      name: 'Familienhaus Elektroauto',
+    });
+  });
+
+  it('nimmt aus einem Amazon-Link ohne Namen nicht die ASIN', () => {
+    const hints = hintsFromUrl(new URL('https://www.amazon.de/dp/B0BYZJXGZQ'));
+    expect(hints.setNumber).toBeUndefined();
+  });
+
+  it('liest idealo und geizhals', () => {
+    expect(
+      hintsFromUrl(
+        new URL(
+          'https://www.idealo.de/preisvergleich/OffersOfProduct/202595377_-familienhaus-mit-elektroauto-60398-lego.html',
+        ),
+      ),
+    ).toEqual({ manufacturer: 'Lego', setNumber: '60398', name: 'Familienhaus mit Elektroauto' });
+
+    expect(
+      hintsFromUrl(new URL('https://geizhals.de/bluebrixx-burg-blaustein-101400-a2101234.html')),
+    ).toEqual({ manufacturer: 'BlueBrixx', setNumber: '101400', name: 'Burg Blaustein' });
+  });
+
+  it('erkennt Cobi-Nummern mit Bindestrich und Jahreszahlen nicht als Setnummer', () => {
+    expect(hintsFromUrl(new URL('https://example.com/shop/cobi-2-30500-ford-mustang-gt')).setNumber).toBe(
+      '2-30500',
+    );
+    expect(
+      hintsFromUrl(new URL('https://example.com/p/playmobil-adventskalender-2024-71472')).setNumber,
+    ).toBe('71472');
+  });
+
+  it('liest Marke und Nummer aus Merlins-Bricks-Adressen', () => {
+    expect(hintsFromUrl(new URL('https://www.merlinsbricks.com/sets/bb-108782/'))).toEqual({
+      manufacturer: 'BlueBrixx',
+      setNumber: '108782',
+    });
+    expect(hintsFromUrl(new URL('https://www.merlinsbricks.com/sets/cobi-2400'))).toEqual({
+      manufacturer: 'Cobi',
+      setNumber: '2400',
+    });
+  });
+
+  it('erkennt den Hersteller am Shop', () => {
+    expect(hintsFromUrl(new URL('https://www.bluebrixx.com/de/star-trek/108123/raumstation')).manufacturer).toBe(
+      'BlueBrixx',
+    );
+  });
+});
+
+describe('Daten aus der Seite', () => {
+  const page = new URL('https://brickfact.com/de-de/sets/lego-city-familienhaus-60398');
+
+  it('nimmt schema.org-Produktdaten', () => {
+    const html = `<html><head>
+      <script type="application/ld+json">{"@context":"https://schema.org","@graph":[
+        {"@type":"WebSite","name":"Brickfact"},
+        {"@type":"Product","name":"LEGO&#174; City Familienhaus mit Elektroauto 60398",
+         "sku":"60398","mpn":"60398","gtin13":"5702017462363",
+         "brand":{"@type":"Brand","name":"LEGO"},
+         "image":["/img/60398.webp"],
+         "description":"Ein Set mit 462 Teilen aus 2023."}]}
+      </script></head></html>`;
+
+    expect(hintsFromHtml(html, page)).toEqual({
+      manufacturer: 'Lego',
+      setNumber: '60398',
+      name: 'LEGO® City Familienhaus mit Elektroauto 60398',
+      ean: '5702017462363',
+      imageUrl: 'https://brickfact.com/img/60398.webp',
+      pieceCount: 462,
+      year: 2023,
+    });
+  });
+
+  it('faellt auf Open Graph zurueck und verwirft ungueltige EAN', () => {
+    const html = `<meta property="og:title" content="Burg Blaustein &amp; Zubeh&ouml;r">
+      <meta content="https://cdn.example.com/burg.jpg" property="og:image">
+      <script type="application/ld+json">{"@type":"Product","gtin13":"1234567890123"}</script>`;
+
+    const hints = hintsFromHtml(html, new URL('https://example.com/burg'));
+    expect(hints.name).toBe('Burg Blaustein & Zubehör');
+    expect(hints.imageUrl).toBe('https://cdn.example.com/burg.jpg');
+    expect(hints.ean).toBeUndefined();
+  });
+
+  it('haelt Shop-Artikelnummern nicht fuer Setnummern', () => {
+    const html = '<script type="application/ld+json">{"@type":"Product","sku":"B0BYZJXGZQ"}</script>';
+    expect(hintsFromHtml(html, page).setNumber).toBeUndefined();
+  });
+
+  it('liest Amazon-Seiten ohne schema.org', () => {
+    const html = `
+      <span id="productTitle" class="a-size-large"> LEGO City Familienhaus mit Elektroauto, 60398 </span>
+      <a id="bylineInfo" href="/stores/LEGO">Besuche den LEGO-Store</a>
+      <script>var data = {"hiRes":"https://m.media-amazon.com/images/I/81abc.jpg","thumb":"x"};</script>
+      <table><tr><th class="prodDetSectionEntry"> Modellnummer </th><td> &lrm;60398 </td></tr>
+      <tr><th class="prodDetSectionEntry"> Anzahl der Teile </th><td> 462 </td></tr></table>`;
+
+    expect(hintsFromHtml(html, new URL('https://www.amazon.de/dp/B0BYZJXGZQ'))).toEqual({
+      manufacturer: 'Lego',
+      setNumber: '60398',
+      name: 'LEGO City Familienhaus mit Elektroauto, 60398',
+      ean: undefined,
+      imageUrl: 'https://m.media-amazon.com/images/I/81abc.jpg',
+      pieceCount: 462,
+    });
+  });
+
+  it('findet die Setnummer im Produktnamen', () => {
+    const html = '<meta property="og:title" content="Cobi 2400 Ford GP ab € 12,90 (2026)">';
+    const hints = hintsFromHtml(html, new URL('https://geizhals.de/x-a1.html'));
+    expect(hints.setNumber).toBe('2400');
+    expect(cleanSetName(hints.name!, 'Cobi', hints.setNumber)).toBe('Ford GP');
+  });
+
+  it('uebersteht kaputtes JSON', () => {
+    const html = '<script type="application/ld+json">{ kaputt </script><meta property="og:title" content="X">';
+    expect(hintsFromHtml(html, page).name).toBe('X');
+  });
+});
+
+describe('Zusammenfuehren und Namen putzen', () => {
+  it('nimmt pro Feld die erste Quelle mit Wert', () => {
+    expect(
+      mergeHints({ name: 'Seite', pieceCount: undefined }, { name: 'Link', pieceCount: 450 }, null),
+    ).toEqual({ name: 'Seite', pieceCount: 450 });
+  });
+
+  it('entfernt Marke, Nummer und Seitennamen', () => {
+    expect(cleanSetName('LEGO® City Familienhaus mit Elektroauto 60398', 'Lego', '60398')).toBe(
+      'City Familienhaus mit Elektroauto',
+    );
+    expect(
+      cleanSetName('BlueBrixx - Technisches Hilfswerk™ Bi-Directional Vehicle | Set 108782', 'BlueBrixx', '108782'),
+    ).toBe('Technisches Hilfswerk Bi-Directional Vehicle');
+    expect(cleanSetName('Cobi Ford GP • Set 2400 • SetDB • Merlins Bricks', 'Cobi', '2400')).toBe('Ford GP');
+  });
+});
+
+describe('Nur oeffentliche Adressen', () => {
+  it('sperrt Heimnetz, Loopback und Metadaten-Adressen', () => {
+    for (const address of [
+      '127.0.0.1',
+      '10.0.0.5',
+      '172.16.3.4',
+      '192.168.178.1',
+      '169.254.169.254',
+      '100.64.0.1',
+      '0.0.0.0',
+      '::1',
+      'fd00::1',
+      'fe80::1',
+      '::ffff:192.168.1.1',
+    ]) {
+      expect(isPublicAddress(address), address).toBe(false);
+    }
+  });
+
+  it('laesst oeffentliche Adressen durch', () => {
+    expect(isPublicAddress('93.184.216.34')).toBe(true);
+    expect(isPublicAddress('2a00:1450:4001:80b::200e')).toBe(true);
+    expect(isPublicAddress('::ffff:93.184.216.34')).toBe(true);
+  });
+
+  it('erlaubt nur normale Web-Links', () => {
+    expect(isAllowedWebUrl(new URL('https://example.com/a'))).toBe(true);
+    expect(isAllowedWebUrl(new URL('http://example.com:80/a'))).toBe(true);
+    expect(isAllowedWebUrl(new URL('file:///etc/passwd'))).toBe(false);
+    expect(isAllowedWebUrl(new URL('https://example.com:8443/'))).toBe(false);
+    expect(isAllowedWebUrl(new URL('https://user:pw@example.com/'))).toBe(false);
+  });
+});
Author	SHA1	Message	Date
unknownandClaude Opus 5.5	d578eac743	docs: link-import in anleitung, changelog und screenshots Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 16:03:00 +01:00
unknownandClaude Opus 5.5	95a28640e1	feat(katalog): set aus einem link uebernehmen Amazon, idealo, geizhals, Hersteller-Shops und Set-Datenbanken: Produkt- daten aus der Seite (schema.org, Open Graph, Amazon-Produktseite), sonst aus dem Link selbst, ergaenzt ueber Rebrickable (Lego) und Merlins Bricks (BlueBrixx, Cobi). Fuellt das Formular vor, das Bild wird beim Speichern lokal abgelegt. Abrufe nur an oeffentliche Adressen (safeFetch). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 16:03:00 +01:00
unknown	498a5c6226	Merge: Release 0.4.0 - Design und Sicherheit	2026-10-25 15:39:55 +01:00
unknownandClaude Opus 5.5	78ae755761	chore(release): version 0.4.0 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 15:39:55 +01:00
unknownandClaude Opus 5.5	62045468ce	fix(deps): abhaengigkeiten mit sicherheitsluecken aktualisieren Next.js 15.5.28, nodemailer 10.2, better-auth 1.7.12, sharp 0.35.5, zod 4.6.7 und drizzle-orm 0.45.4. Transitive Pakete der Entwicklungswerkzeuge (postcss, vite, shadcn-CLI) per pnpm.overrides. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 15:39:55 +01:00
unknown	bac948fcb8	Merge: Designauswahl mit Klemmbaustein-Look	2026-10-25 15:26:27 +01:00
unknown	2d3ddc4dae	Merge: update.sh ausfuehrbar einchecken	2026-10-25 15:26:27 +01:00
unknownandClaude Opus 5.5	604a8ac113	fix(sammlung): status-badge gruen statt in der aktionsfarbe Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 15:26:27 +01:00
unknownandClaude Opus 5.5	f2304b28e5	fix(update): update.sh als ausfuehrbar einchecken Bisher lag das Skript mit Modus 100644 im Repo. Ein chmod +x auf dem Server galt dann als lokale Aenderung, und update.sh brach vor dem Pull mit "Es gibt lokale Aenderungen" ab. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 15:20:53 +01:00
unknownandClaude Opus 5.5	d009230dc2	docs: anleitung, changelog und screenshots zum neuen design Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 15:01:33 +01:00
unknownandClaude Opus 5.5	1b825b44c4	feat(design): designauswahl mit klemmbaustein-look als standard Sechs Designs (Klemmbaustein, Warm, Nachtblau, Bonbon, Bauklotz, Schlicht) als Tokens je data-design, gewaehlt unter Konto und pro Geraet im Cookie gespeichert. Dazu Noppen, Steinkontur, Platzhalter fuer Sets ohne Bild, neues Logo, lokal gebuendelte Schriften und eine Startseite mit Steinreihe und naechstem Termin. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-25 15:01:33 +01:00