feat(home): Collapsible Sections fuer Favoriten + Zuletzt hinzugefuegt

Header als <button> mit Chevron + Count-Pill, slide-Transition (180ms).
State in localStorage unter kochwas.collapsed.sections — JSON-Map
{favorites, recent}, default beide offen, corrupt-JSON faellt auf
Default zurueck.

Alle Rezepte bleibt absichtlich nicht-collapsibel — Hauptliste, immer
sichtbar.

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

src/routes/+page.svelte

@@ -1,7 +1,8 @@
 <script lang="ts">
   import { onMount, tick } from 'svelte';
   import { page } from '$app/stores';
-  import { CookingPot, X } from 'lucide-svelte';
+  import { CookingPot, X, ChevronDown } from 'lucide-svelte';
+  import { slide } from 'svelte/transition';
   import type { Snapshot } from './$types';
   import type { SearchHit } from '$lib/server/recipes/search-local';
   import { randomQuote } from '$lib/quotes';
@@ -49,6 +50,20 @@
   let allChips: HTMLElement | undefined = $state();
   let allObserver: IntersectionObserver | null = null;
 
+  type CollapseKey = 'favorites' | 'recent';
+  const COLLAPSE_STORAGE_KEY = 'kochwas.collapsed.sections';
+  let collapsed = $state<Record<CollapseKey, boolean>>({
+    favorites: false,
+    recent: false
+  });
+
+  function toggleCollapsed(key: CollapseKey) {
+    collapsed[key] = !collapsed[key];
+    if (typeof localStorage !== 'undefined') {
+      localStorage.setItem(COLLAPSE_STORAGE_KEY, JSON.stringify(collapsed));
+    }
+  }
+
   // Snapshot persists across history navigation. We capture not only the
   // search store, but also the pagination depth ("user had loaded 60
   // recipes via infinite scroll") so on back-nav we can re-hydrate the
@@ -175,6 +190,16 @@
     // this; if loadAllMore lands first, rehydrateAll's larger result
     // simply overwrites allRecipes once it resolves.
     void loadAllMore();
+    const rawCollapsed = localStorage.getItem(COLLAPSE_STORAGE_KEY);
+    if (rawCollapsed) {
+      try {
+        const parsed = JSON.parse(rawCollapsed) as Partial<Record<CollapseKey, boolean>>;
+        if (typeof parsed.favorites === 'boolean') collapsed.favorites = parsed.favorites;
+        if (typeof parsed.recent === 'boolean') collapsed.recent = parsed.recent;
+      } catch {
+        // Corrupt JSON — keep defaults (both open).
+      }
+    }
   });
 
   // IntersectionObserver an den Sentinel hängen — wenn sichtbar, nachladen.
@@ -376,57 +401,91 @@
 {:else}
   {#if profileStore.active && favorites.length > 0}
     <section class="listing">
-      <h2>Deine Favoriten</h2>
+      <button
-      <ul class="cards">
+        type="button"
-        {#each favorites as r (r.id)}
+        class="section-head"
-          <li class="card-wrap">
+        onclick={() => toggleCollapsed('favorites')}
-            <a href={`/recipes/${r.id}`} class="card">
+        aria-expanded={!collapsed.favorites}
-              {#if r.image_path}
+      >
-                <img src={`/images/${r.image_path}`} alt="" loading="lazy" />
+        <ChevronDown
-              {:else}
+          size={18}
-                <div class="placeholder"><CookingPot size={36} /></div>
+          strokeWidth={2.2}
-              {/if}
+          class={collapsed.favorites ? 'chev rotated' : 'chev'}
-              <div class="card-body">
+        />
-                <div class="title">{r.title}</div>
+        <h2>Deine Favoriten</h2>
-                {#if r.source_domain}
+        <span class="count">{favorites.length}</span>
-                  <div class="domain">{r.source_domain}</div>
+      </button>
-                {/if}
+      {#if !collapsed.favorites}
-              </div>
+        <div transition:slide={{ duration: 180 }}>
-            </a>
+          <ul class="cards">
-          </li>
+            {#each favorites as r (r.id)}
-        {/each}
+              <li class="card-wrap">
-      </ul>
+                <a href={`/recipes/${r.id}`} class="card">
+                  {#if r.image_path}
+                    <img src={`/images/${r.image_path}`} alt="" loading="lazy" />
+                  {:else}
+                    <div class="placeholder"><CookingPot size={36} /></div>
+                  {/if}
+                  <div class="card-body">
+                    <div class="title">{r.title}</div>
+                    {#if r.source_domain}
+                      <div class="domain">{r.source_domain}</div>
+                    {/if}
+                  </div>
+                </a>
+              </li>
+            {/each}
+          </ul>
+        </div>
+      {/if}
     </section>
   {/if}
   {#if recent.length > 0}
     <section class="listing">
-      <h2>Zuletzt hinzugefügt</h2>
+      <button
-      <ul class="cards">
+        type="button"
-        {#each recent as r (r.id)}
+        class="section-head"
-          <li class="card-wrap">
+        onclick={() => toggleCollapsed('recent')}
-            <a href={`/recipes/${r.id}`} class="card">
+        aria-expanded={!collapsed.recent}
-              {#if r.image_path}
+      >
-                <img src={`/images/${r.image_path}`} alt="" loading="lazy" />
+        <ChevronDown
-              {:else}
+          size={18}
-                <div class="placeholder"><CookingPot size={36} /></div>
+          strokeWidth={2.2}
-              {/if}
+          class={collapsed.recent ? 'chev rotated' : 'chev'}
-              <div class="card-body">
+        />
-                <div class="title">{r.title}</div>
+        <h2>Zuletzt hinzugefügt</h2>
-                {#if r.source_domain}
+        <span class="count">{recent.length}</span>
-                  <div class="domain">{r.source_domain}</div>
+      </button>
-                {/if}
+      {#if !collapsed.recent}
-              </div>
+        <div transition:slide={{ duration: 180 }}>
-            </a>
+          <ul class="cards">
-            <button
+            {#each recent as r (r.id)}
-              class="dismiss"
+              <li class="card-wrap">
-              aria-label="Aus Zuletzt-hinzugefügt entfernen"
+                <a href={`/recipes/${r.id}`} class="card">
-              onclick={(e) => dismissFromRecent(r.id, e)}
+                  {#if r.image_path}
-            >
+                    <img src={`/images/${r.image_path}`} alt="" loading="lazy" />
-              <X size={16} strokeWidth={2.5} />
+                  {:else}
-            </button>
+                    <div class="placeholder"><CookingPot size={36} /></div>
-          </li>
+                  {/if}
-        {/each}
+                  <div class="card-body">
-      </ul>
+                    <div class="title">{r.title}</div>
+                    {#if r.source_domain}
+                      <div class="domain">{r.source_domain}</div>
+                    {/if}
+                  </div>
+                </a>
+                <button
+                  class="dismiss"
+                  aria-label="Aus Zuletzt-hinzugefügt entfernen"
+                  onclick={(e) => dismissFromRecent(r.id, e)}
+                >
+                  <X size={16} strokeWidth={2.5} />
+                </button>
+              </li>
+            {/each}
+          </ul>
+        </div>
+      {/if}
     </section>
   {/if}
   <section class="listing">
@@ -546,6 +605,45 @@
     color: #444;
     margin: 0 0 0.75rem;
   }
+  .section-head {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    width: 100%;
+    padding: 0.4rem 0.25rem;
+    background: transparent;
+    border: 0;
+    border-radius: 8px;
+    text-align: left;
+    cursor: pointer;
+    font-family: inherit;
+    color: inherit;
+    min-height: 44px;
+    margin-bottom: 0.4rem;
+  }
+  .section-head:hover {
+    background: #f4f8f5;
+  }
+  .section-head h2 {
+    margin: 0;
+    font-size: 1.05rem;
+    color: #444;
+    font-weight: 600;
+  }
+  .section-head .count {
+    margin-left: auto;
+    color: #888;
+    font-size: 0.85rem;
+    font-variant-numeric: tabular-nums;
+  }
+  :global(.chev) {
+    color: #2b6a3d;
+    flex-shrink: 0;
+    transition: transform 180ms;
+  }
+  :global(.chev.rotated) {
+    transform: rotate(-90deg);
+  }
   .listing-head {
     display: flex;
     align-items: center;