fix: remove duplicate search bar from PC sidebar

The magnifier icon in the top-right already opens search.
Having a second search box in the sidebar was redundant.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

index.html

@@ -49,12 +49,6 @@
           <span>Nova<em>Sonic</em></span>
         </div>
       </div>
-      <div class="search-wrap">
-        <div class="search-box" onclick="document.getElementById('search-input').focus()">
-          <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="11" cy="11" r="8"/><path d="m21 21-4.35-4.35"/></svg>
-          <input id="search-input" type="text" placeholder="Lokale Suche…" oninput="onLocalSearch(this.value)">
-        </div>
-      </div>
       <nav>
         <div class="nav-section">
           <div class="nav-section-title">Bibliothek</div>