fix: keep Mol database layers explicit on map

frontend/src/styles/app.css

@@ -4969,7 +4969,7 @@ section {
 }
 
 .map-workspace-shell .map-toolbar {
-  grid-template-columns: minmax(13rem, 1.25fr) minmax(10rem, 1fr) repeat(2, minmax(8rem, 0.85fr)) minmax(11rem, 1fr);
+  grid-template-columns: minmax(10rem, 0.9fr) minmax(13rem, 1.25fr) minmax(10rem, 1fr) repeat(2, minmax(8rem, 0.85fr)) minmax(11rem, 1fr);
   gap: 0.5rem;
 }
 
@@ -4977,6 +4977,55 @@ section {
   margin-top: 0;
 }
 
+.map-layer-mode {
+  display: grid;
+  align-content: start;
+  gap: 0.34rem;
+  min-width: 0;
+}
+
+.map-layer-mode > span {
+  color: var(--muted);
+  font-size: 0.7rem;
+  font-weight: 700;
+}
+
+.map-layer-mode > div {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  overflow: hidden;
+  border: 1px solid var(--line-strong);
+  border-radius: 6px;
+  background: var(--panel-soft);
+}
+
+.map-layer-mode button {
+  min-width: 0;
+  min-height: 2.2rem;
+  border: 0;
+  border-radius: 0;
+  padding: 0.36rem 0.42rem;
+  background: transparent;
+  color: var(--muted);
+  font-size: 0.68rem;
+  font-weight: 750;
+  line-height: 1.15;
+}
+
+.map-layer-mode button + button {
+  border-left: 1px solid var(--line-strong);
+}
+
+.map-layer-mode button[aria-pressed='true'] {
+  background: var(--accent-strong);
+  color: #ffffff;
+}
+
+.map-layer-mode button:disabled {
+  cursor: not-allowed;
+  opacity: 0.45;
+}
+
 .layer-control-card,
 .map-status {
   border-radius: 6px;