refactor(search): local search ignores domain filter

Der Domain-Filter im Header-Dropdown wirkt ab jetzt ausschliesslich auf
die Web-Suche (SearXNG). Die Suche in gespeicherten Rezepten liefert
immer alle Treffer, unabhaengig von der Quelldomain -- wer ein Rezept
gespeichert hat, will es finden, selbst wenn er die Domain aus dem
Filter ausgeschlossen hat.

- SearchStore: filterParam -> webFilterParam, nur noch an Web-Calls
- /api/recipes/search: domains-Query-Param wird nicht mehr gelesen
- searchLocal(): domains-Parameter + SQL-Branch entfernt
- Tests entsprechend angepasst

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

tests/unit/search-store.test.ts

@@ -202,7 +202,7 @@ describe('SearchStore', () => {
     expect(round).toEqual(snap);
   });
 
-  it('filterParam option: gets appended to both local and web requests', async () => {
+  it('webFilterParam option: only appended to web requests, never to local', async () => {
     vi.useFakeTimers();
     const fetchImpl = mockFetch([
       { body: { hits: [] } },
@@ -211,13 +211,15 @@ describe('SearchStore', () => {
     const store = new SearchStore({
       fetchImpl,
       debounceMs: 10,
-      filterParam: () => '&domains=chefkoch.de'
+      webFilterParam: () => '&domains=chefkoch.de'
     });
     store.query = 'curry';
     store.runDebounced();
     await vi.advanceTimersByTimeAsync(15);
     await vi.waitFor(() => expect(fetchImpl).toHaveBeenCalledTimes(2));
-    expect(fetchImpl.mock.calls[0][0]).toMatch(/&domains=chefkoch\.de/);
+    expect(fetchImpl.mock.calls[0][0]).not.toMatch(/domains=/);
+    expect(fetchImpl.mock.calls[0][0]).toMatch(/\/api\/recipes\/search\?/);
+    expect(fetchImpl.mock.calls[1][0]).toMatch(/\/api\/recipes\/search\/web\?/);
     expect(fetchImpl.mock.calls[1][0]).toMatch(/&domains=chefkoch\.de/);
   });
 
@@ -243,22 +245,25 @@ describe('SearchStore', () => {
     const fetchImpl = mockFetch([
       { body: { hits: [] } },
       { body: { hits: [] } },
-      { body: { hits: [{ id: 1, title: 'filtered', description: null, image_path: null, source_domain: null, avg_stars: null, last_cooked_at: null }] } }
+      { body: { hits: [] } },
+      { body: { hits: [{ url: 'https://chefkoch.de/x', title: 'filtered', domain: 'chefkoch.de', snippet: null, thumbnail: null }] } }
     ]);
     const store = new SearchStore({
       fetchImpl,
       debounceMs: 10,
       filterDebounceMs: 5,
-      filterParam: () => filter
+      webFilterParam: () => filter
     });
     store.query = 'broth';
     store.runDebounced();
     await vi.advanceTimersByTimeAsync(15);
+    await vi.waitFor(() => expect(fetchImpl).toHaveBeenCalledTimes(2));
     filter = '&domains=chefkoch.de';
     store.reSearch();
     await vi.advanceTimersByTimeAsync(10);
-    await vi.waitFor(() => expect(store.hits).toHaveLength(1));
+    await vi.waitFor(() => expect(store.webHits).toHaveLength(1));
     const last = fetchImpl.mock.calls.at(-1)?.[0] as string;
+    expect(last).toMatch(/\/api\/recipes\/search\/web\?/);
     expect(last).toMatch(/&domains=chefkoch\.de/);
   });
 });