perf: 完善黑夜模式的表现效果，工作流编排幕布和节点在黑夜模式正常表现

easyflow-ui-admin/packages/tinyflow-vue/src/Tinyflow.vue

@@ -5,7 +5,7 @@
 <script setup lang="ts">
 import {Tinyflow as TinyflowNative, TinyflowOptions} from '@tinyflow-ai/ui';
 import '@tinyflow-ai/ui/dist/index.css';
-import {onMounted, onUnmounted, ref} from 'vue';
+import {onMounted, onUnmounted, ref, watch} from 'vue';
 
 const props = defineProps<
     {
@@ -55,6 +55,15 @@ onUnmounted(() => {
     }
 });
 
+watch(
+    () => props.theme,
+    (theme) => {
+        if (tinyflow) {
+            tinyflow.setTheme(theme || 'light');
+        }
+    }
+);
+
 const getData = () => {
     if (tinyflow) {
         return tinyflow.getData();
@@ -71,8 +80,17 @@ const getInstance = () => {
     return null;
 };
 
+const focusNode = async (nodeId: string, options?: { duration?: number; zoom?: number }) => {
+    if (tinyflow) {
+        return tinyflow.focusNode(nodeId, options);
+    }
+    console.warn('Tinyflow instance is not initialized');
+    return false;
+};
+
 defineExpose({
     getData,
-    getInstance
+    getInstance,
+    focusNode
 });
 </script>