refactor(layout): Header-Dropdown nutzt SearchStore

Ersetzt die 10 lokalen $state-Felder, den Debounce-$effect und die
lokalen Search-Funktionen durch eine SearchStore-Instanz. Nav-Open-
Toggle, Click-outside und Menu-State bleiben lokal — UI-Concerns.

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

src/routes/+layout.svelte

@@ -17,26 +17,20 @@
   import { network } from '$lib/client/network.svelte';
   import { installPrompt } from '$lib/client/install-prompt.svelte';
   import { registerServiceWorker } from '$lib/client/sw-register';
-  import type { SearchHit } from '$lib/server/recipes/search-local';
+  import { SearchStore } from '$lib/client/search.svelte';
-  import type { WebHit } from '$lib/server/search/searxng';
 
   let { children } = $props();
 
-  const NAV_PAGE_SIZE = 30;
+  const navStore = new SearchStore({
+    pageSize: 30,
+    filterParam: () => {
+      const p = searchFilterStore.queryParam;
+      return p ? `&domains=${encodeURIComponent(p)}` : '';
+    }
+  });
 
-  let navQuery = $state('');
-  let navHits = $state<SearchHit[]>([]);
-  let navWebHits = $state<WebHit[]>([]);
-  let navSearching = $state(false);
-  let navWebSearching = $state(false);
-  let navWebError = $state<string | null>(null);
   let navOpen = $state(false);
-  let navLocalExhausted = $state(false);
-  let navWebPageno = $state(0);
-  let navWebExhausted = $state(false);
-  let navLoadingMore = $state(false);
   let navContainer: HTMLElement | undefined = $state();
-  let debounceTimer: ReturnType<typeof setTimeout> | null = null;
   let menuOpen = $state(false);
   let menuContainer: HTMLElement | undefined = $state();
 
@@ -44,123 +38,21 @@
     $page.url.pathname.startsWith('/recipes/') || $page.url.pathname === '/preview'
   );
 
-  function filterParam(): string {
-    const p = searchFilterStore.queryParam;
-    return p ? `&domains=${encodeURIComponent(p)}` : '';
-  }
-
   $effect(() => {
-    const q = navQuery.trim();
+    // Bare reads register the reactive deps; then kick the store.
-    if (debounceTimer) clearTimeout(debounceTimer);
+    const q = navStore.query;
-    if (q.length <= 3) {
+    navStore.runDebounced();
-      navHits = [];
+    // navOpen follows query length: open while typing, close when cleared.
-      navWebHits = [];
+    navOpen = q.trim().length > 3;
-      navSearching = false;
-      navWebSearching = false;
-      navWebError = null;
-      navOpen = false;
-      navLocalExhausted = false;
-      navWebPageno = 0;
-      navWebExhausted = false;
-      return;
-    }
-    navSearching = true;
-    navWebHits = [];
-    navWebSearching = false;
-    navWebError = null;
-    navOpen = true;
-    navLocalExhausted = false;
-    navWebPageno = 0;
-    navWebExhausted = false;
-    debounceTimer = setTimeout(async () => {
-      try {
-        const res = await fetch(
-          `/api/recipes/search?q=${encodeURIComponent(q)}&limit=${NAV_PAGE_SIZE}${filterParam()}`
-        );
-        const body = await res.json();
-        if (navQuery.trim() !== q) return;
-        navHits = body.hits;
-        if (navHits.length < NAV_PAGE_SIZE) navLocalExhausted = true;
-        if (navHits.length === 0) {
-          navWebSearching = true;
-          try {
-            const wres = await fetch(
-              `/api/recipes/search/web?q=${encodeURIComponent(q)}&pageno=1${filterParam()}`
-            );
-            if (navQuery.trim() !== q) return;
-            if (!wres.ok) {
-              const err = await wres.json().catch(() => ({}));
-              navWebError = err.message ?? `HTTP ${wres.status}`;
-              navWebExhausted = true;
-            } else {
-              const wbody = await wres.json();
-              navWebHits = wbody.hits;
-              navWebPageno = 1;
-              if (navWebHits.length === 0) navWebExhausted = true;
-            }
-          } finally {
-            if (navQuery.trim() === q) navWebSearching = false;
-          }
-        }
-      } finally {
-        if (navQuery.trim() === q) navSearching = false;
-      }
-    }, 300);
   });
 
-  async function loadMoreNav() {
+  function loadMoreNav() {
-    if (navLoadingMore) return;
+    return navStore.loadMore();
-    const q = navQuery.trim();
-    if (!q) return;
-    navLoadingMore = true;
-    try {
-      if (!navLocalExhausted) {
-        const res = await fetch(
-          `/api/recipes/search?q=${encodeURIComponent(q)}&limit=${NAV_PAGE_SIZE}&offset=${navHits.length}${filterParam()}`
-        );
-        const body = await res.json();
-        if (navQuery.trim() !== q) return;
-        const more = body.hits as SearchHit[];
-        const seen = new Set(navHits.map((h) => h.id));
-        const deduped = more.filter((h) => !seen.has(h.id));
-        navHits = [...navHits, ...deduped];
-        if (more.length < NAV_PAGE_SIZE) navLocalExhausted = true;
-      } else if (!navWebExhausted) {
-        const nextPage = navWebPageno + 1;
-        navWebSearching = navWebHits.length === 0;
-        try {
-          const wres = await fetch(
-            `/api/recipes/search/web?q=${encodeURIComponent(q)}&pageno=${nextPage}${filterParam()}`
-          );
-          if (navQuery.trim() !== q) return;
-          if (!wres.ok) {
-            const err = await wres.json().catch(() => ({}));
-            navWebError = err.message ?? `HTTP ${wres.status}`;
-            navWebExhausted = true;
-            return;
-          }
-          const wbody = await wres.json();
-          const more = wbody.hits as WebHit[];
-          const seen = new Set(navWebHits.map((h) => h.url));
-          const deduped = more.filter((h) => !seen.has(h.url));
-          if (deduped.length === 0) {
-            navWebExhausted = true;
-          } else {
-            navWebHits = [...navWebHits, ...deduped];
-            navWebPageno = nextPage;
-          }
-        } finally {
-          if (navQuery.trim() === q) navWebSearching = false;
-        }
-      }
-    } finally {
-      navLoadingMore = false;
-    }
   }
 
   function submitNav(e: SubmitEvent) {
     e.preventDefault();
-    const q = navQuery.trim();
+    const q = navStore.query.trim();
     if (!q) return;
     navOpen = false;
     void goto(`/?q=${encodeURIComponent(q)}`);
@@ -184,15 +76,11 @@
 
   function pickHit() {
     navOpen = false;
-    navQuery = '';
+    navStore.reset();
-    navHits = [];
-    navWebHits = [];
   }
 
   afterNavigate(() => {
-    navQuery = '';
+    navStore.reset();
-    navHits = [];
-    navWebHits = [];
     navOpen = false;
     menuOpen = false;
     // Badge nach jeder Client-Navigation frisch halten — sonst kann er
@@ -239,9 +127,9 @@
           <SearchFilter inline />
           <input
             type="search"
-            bind:value={navQuery}
+            bind:value={navStore.query}
             onfocus={() => {
-              if (navHits.length > 0 || navQuery.trim().length > 3) navOpen = true;
+              if (navStore.hits.length > 0 || navStore.query.trim().length > 3) navOpen = true;
             }}
             placeholder="Rezept suchen…"
             autocomplete="off"
@@ -251,12 +139,12 @@
         </form>
         {#if navOpen}
           <div class="dropdown" role="listbox">
-            {#if navSearching && navHits.length === 0 && navWebHits.length === 0}
+            {#if navStore.searching && navStore.hits.length === 0 && navStore.webHits.length === 0}
               <SearchLoader scope="local" size="sm" />
             {:else}
-              {#if navHits.length > 0}
+              {#if navStore.hits.length > 0}
                 <ul class="dd-list">
-                  {#each navHits as r (r.id)}
+                  {#each navStore.hits as r (r.id)}
                     <li>
                       <a
                         href={`/recipes/${r.id}`}
@@ -282,14 +170,14 @@
                 </ul>
               {/if}
 
-              {#if navWebHits.length > 0}
+              {#if navStore.webHits.length > 0}
-                {#if navHits.length > 0}
+                {#if navStore.hits.length > 0}
                   <p class="dd-section">Aus dem Internet</p>
                 {:else}
                   <p class="dd-section">Keine lokalen Rezepte – aus dem Internet:</p>
                 {/if}
                 <ul class="dd-list">
-                  {#each navWebHits as w (w.url)}
+                  {#each navStore.webHits as w (w.url)}
                     <li>
                       <a
                         href={`/preview?url=${encodeURIComponent(w.url)}`}
@@ -313,23 +201,23 @@
                 </ul>
               {/if}
 
-              {#if navWebSearching}
+              {#if navStore.webSearching}
                 <SearchLoader scope="web" size="sm" />
-              {:else if navWebError && navWebHits.length === 0}
+              {:else if navStore.webError && navStore.webHits.length === 0}
                 <p class="dd-status dd-error">Internet-Suche zurzeit nicht möglich.</p>
-              {:else if navHits.length === 0 && navWebHits.length === 0 && !navSearching}
+              {:else if navStore.hits.length === 0 && navStore.webHits.length === 0 && !navStore.searching}
                 <p class="dd-status">Auch im Internet nichts gefunden.</p>
               {/if}
 
-              {#if !(navLocalExhausted && navWebExhausted) && (navHits.length > 0 || navWebHits.length > 0)}
+              {#if !(navStore.localExhausted && navStore.webExhausted) && (navStore.hits.length > 0 || navStore.webHits.length > 0)}
                 <button
                   class="dd-web"
                   type="button"
                   onclick={loadMoreNav}
-                  disabled={navLoadingMore || navWebSearching}
+                  disabled={navStore.loadingMore || navStore.webSearching}
                 >
                   <span
-                    >{navLoadingMore || navWebSearching
+                    >{navStore.loadingMore || navStore.webSearching
                       ? 'Lade …'
                       : '+ weitere Ergebnisse'}</span
                   >