fix fixbugs

importmap.js

@@ -1,6 +1,7 @@
+const importMapJson = './importmap.json';
 const getCacheKey = () => {
   // 基于import map文件的路径，而不是当前模块的URL
-  const url = new URL('./importmap.json', window.location.href);
+  const url = new URL(importMapJson, window.location.href);
   const basePath = url.pathname.replace('/importmap.json', '');
   return `importMap_${btoa(basePath).replace(/[+/=]/g, '_')}`;
 };
@@ -95,7 +96,7 @@ const loadImportMap = async () => {
 
       return;
     }
-    const response = await fetch('./imports.json');
+    const response = await fetch(importMapJson);
     if (!response.ok) {
       throw new Error(`HTTP error! status: ${response.status}`);
     }
@@ -114,7 +115,7 @@ const loadImportMap = async () => {
 // 后台更新缓存（可选功能）
 export const updateCacheInBackground = async () => {
   try {
-    const response = await fetch('./imports.json');
+    const response = await fetch(importMapJson);
     if (response.ok) {
       const data = await response.json();
       setCachedImportMap(data);