修改

public/css/style.css

@@ -237,6 +237,31 @@ body {
   box-shadow: inset 0 -2px 0 var(--stop);
 }
 
+.mode-btn.has-marker::after {
+  content: "●";
+  margin-left: 4px;
+  font-size: 0.55rem;
+  vertical-align: super;
+  opacity: 0.85;
+}
+
+.mode-btn[data-mode="entry"].has-marker::after {
+  color: var(--entry);
+}
+
+.mode-btn[data-mode="exit"].has-marker::after {
+  color: var(--exit);
+}
+
+.mode-btn[data-mode="stop"].has-marker::after {
+  color: var(--stop);
+}
+
+.viewport.is-panning,
+.viewport.is-panning #overlay-canvas {
+  cursor: grabbing;
+}
+
 .workspace {
   flex: 1;
   display: flex;
@@ -325,7 +350,11 @@ body {
   position: absolute;
   top: 0;
   left: 0;
-  cursor: crosshair;
+  cursor: grab;
+}
+
+#overlay-canvas.can-pan {
+  cursor: grab;
 }
 
 #overlay-canvas.can-drag {