ui: move search results below download/extract controls

Search bar stays at top as the "command center".
Download queue and extract controls follow.
Results render at the bottom — the main scrolling area.

web/ui/app.js

@@ -29,6 +29,7 @@ async function doSearch() {
     const resp = await fetch(`${API}/search?${params}`);
     const data = await resp.json();
     status.textContent = `Found ${data.length} items`;
+    document.getElementById('result-count').textContent = `(${data.length})`;
     renderResults(data);
   } catch (e) {
     status.textContent = 'Search failed: ' + e.message;