feat: unify asset/rule interop and add toolbar asset manager

src/components/flow/PropertyPanel.vue

@@ -66,7 +66,10 @@ const currentAssetLibrary = computed({
     </div>
 
     <div v-if="!hasNodeSelected" class="no-selection">
-      <p>请选择一个节点以编辑其属性</p>
+      <div class="no-selection-text">
+        <p>请选择一个节点以编辑其属性</p>
+        <p class="no-selection-tip">素材入口：添加并选中 assetSelector 节点后，点击“选择资产”。</p>
+      </div>
     </div>
 
     <div v-else class="property-content">
@@ -155,6 +158,18 @@ const currentAssetLibrary = computed({
   text-align: center;
 }
 
+.no-selection-text {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.no-selection-tip {
+  font-size: 12px;
+  color: #606266;
+  margin: 0;
+}
+
 .property-content {
   padding: 10px;
   flex: 1;