feat: add debounced search dropdown with quick results

static/css/style.css

@@ -76,6 +76,11 @@ header {
   text-decoration: underline;
 }
 
+.header-search-wrapper {
+  margin-left: auto;
+  position: relative;
+}
+
 .header-search {
   margin-left: auto;
 }
@@ -99,6 +104,108 @@ header {
   color: var(--text-muted);
 }
 
+/* Search Dropdown */
+.search-dropdown {
+  position: absolute;
+  top: 100%;
+  right: 0;
+  width: 320px;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-top: none;
+  margin-top: -1px;
+  max-height: 480px;
+  overflow-y: auto;
+  z-index: 1000;
+}
+
+.search-results {
+  display: flex;
+  flex-direction: column;
+}
+
+.search-results-title {
+  padding: 8px 12px;
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  border-bottom: 1px solid var(--border);
+}
+
+.search-result-item {
+  display: flex;
+  gap: 10px;
+  padding: 8px 12px;
+  border-bottom: 1px solid var(--border);
+  text-decoration: none;
+  color: inherit;
+  transition: background 0.15s;
+}
+
+.search-result-item:hover {
+  background: var(--surface-hover);
+}
+
+.search-result-thumb {
+  width: 40px;
+  height: 60px;
+  object-fit: cover;
+  border: 1px solid var(--border);
+  flex-shrink: 0;
+}
+
+.search-result-no-image {
+  width: 40px;
+  height: 60px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--surface-hover);
+  border: 1px solid var(--border);
+  font-size: 10px;
+  color: var(--text-muted);
+  flex-shrink: 0;
+}
+
+.search-result-info {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+  flex: 1;
+}
+
+.search-result-title {
+  font-size: 12px;
+  color: var(--text);
+  font-weight: 500;
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+}
+
+.search-result-type {
+  font-size: 11px;
+  color: var(--text-muted);
+}
+
+.search-result-view-all {
+  display: block;
+  padding: 10px 12px;
+  text-align: center;
+  color: var(--link);
+  font-size: 12px;
+  border-top: 1px solid var(--border);
+  text-decoration: none;
+}
+
+.search-result-view-all:hover {
+  background: var(--surface-hover);
+  text-decoration: underline;
+}
+
 /* Main */
 main {
   padding: 16px;