feat: manage pluggable search services

src/index.css

@@ -577,6 +577,44 @@ body,
   justify-self: stretch;
 }
 
+.search-service-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr));
+  gap: 14px;
+  margin: 14px 0;
+}
+
+.search-service-card {
+  min-width: 0;
+  padding: 14px;
+  border: 1px solid var(--color-border-input);
+  border-radius: var(--radius-md);
+}
+
+.search-service-card legend {
+  padding: 0 6px;
+  font-weight: 600;
+}
+
+.search-service-toggle {
+  display: flex !important;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 12px;
+  color: var(--color-text-primary) !important;
+}
+
+.search-service-toggle input {
+  width: auto;
+  margin: 0;
+}
+
+.search-service-actions {
+  display: flex;
+  gap: 8px;
+  margin-top: 12px;
+}
+
 .form-span-all {
   grid-column: 1 / -1;
 }