feat(print): add print-optimized route with server-side portion scaling

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/routes/recipes/[id]/print/+page.svelte

@@ -0,0 +1,140 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+
+  let { data } = $props();
+
+  function formatQty(q: number | null): string {
+    if (q === null) return '';
+    if (Number.isInteger(q)) return String(q);
+    return q.toLocaleString('de-DE', { maximumFractionDigits: 2 });
+  }
+
+  onMount(() => {
+    setTimeout(() => window.print(), 250);
+  });
+</script>
+
+<article class="print">
+  <header>
+    <h1>{data.recipe.title}</h1>
+    <p class="meta">
+      {data.servings} {data.recipe.servings_unit ?? 'Portionen'}
+      {#if data.recipe.prep_time_min}· Vorb. {data.recipe.prep_time_min} min{/if}
+      {#if data.recipe.cook_time_min}· Kochen {data.recipe.cook_time_min} min{/if}
+      {#if data.recipe.source_url}
+        · Quelle: {data.recipe.source_domain}
+      {/if}
+    </p>
+  </header>
+
+  {#if data.recipe.image_path}
+    <img src={`/images/${data.recipe.image_path}`} alt="" />
+  {/if}
+
+  <section>
+    <h2>Zutaten</h2>
+    <ul class="ingredients">
+      {#each data.ingredients as ing, i (i)}
+        <li>
+          <span class="qty">
+            {formatQty(ing.quantity)}{#if ing.unit}{' '}{ing.unit}{/if}
+          </span>
+          <span class="name">
+            {ing.name}{#if ing.note}{' '}<em>({ing.note})</em>{/if}
+          </span>
+        </li>
+      {/each}
+    </ul>
+  </section>
+
+  <section>
+    <h2>Zubereitung</h2>
+    <ol class="steps">
+      {#each data.recipe.steps as step (step.position)}
+        <li>{step.text}</li>
+      {/each}
+    </ol>
+  </section>
+
+  {#if data.recipe.source_url}
+    <footer>
+      <p>Quelle: <a href={data.recipe.source_url}>{data.recipe.source_url}</a></p>
+    </footer>
+  {/if}
+</article>
+
+<style>
+  :global(body) {
+    background: white !important;
+  }
+  :global(header.bar),
+  :global(nav.tabs) {
+    display: none !important;
+  }
+  .print {
+    font-family: Georgia, 'Liberation Serif', serif;
+    color: #111;
+    max-width: 190mm;
+    margin: 0 auto;
+    padding: 1rem;
+  }
+  h1 {
+    font-size: 2rem;
+    margin: 0 0 0.4rem;
+  }
+  .meta {
+    color: #555;
+    margin: 0 0 1rem;
+    font-size: 0.95rem;
+  }
+  img {
+    max-width: 50%;
+    float: right;
+    margin: 0 0 1rem 1rem;
+    border-radius: 6px;
+  }
+  h2 {
+    font-size: 1.15rem;
+    border-bottom: 1px solid #bbb;
+    padding-bottom: 0.25rem;
+    margin-top: 1.5rem;
+  }
+  .ingredients {
+    list-style: none;
+    padding: 0;
+    margin: 0;
+    columns: 2;
+    column-gap: 1.5rem;
+  }
+  .ingredients li {
+    break-inside: avoid;
+    padding: 0.25rem 0;
+    font-size: 0.95rem;
+  }
+  .qty {
+    display: inline-block;
+    min-width: 5rem;
+    font-weight: 600;
+  }
+  .steps {
+    padding-left: 1.25rem;
+  }
+  .steps li {
+    margin-bottom: 0.6rem;
+    line-height: 1.4;
+  }
+  footer {
+    margin-top: 2rem;
+    color: #666;
+    font-size: 0.85rem;
+    text-align: center;
+  }
+  @media print {
+    @page {
+      margin: 15mm;
+    }
+    .print {
+      padding: 0;
+    }
+  }
+</style>