Update project file download logic to use fetch POST request

src/routes/home/ProjectManager.tsx

@@ -20,19 +20,15 @@ function ProjectManager() {
   const appState = useAppState();
   const projects = useProjectsList();
 
-  const downloadProjectFile = () => {
+  const downloadProjectFile = async () => {
     if (!data?.projectFile) {
       return;
     }
 
-    const url = URL.createObjectURL(data.projectFile);
-    const link = document.createElement('a');
-    link.href = url;
-    link.download = data.projectFile.name;
-    document.body.appendChild(link);
-    link.click();
-    link.remove();
-    URL.revokeObjectURL(url);
+    await fetch('http://127.0.0.1:5174/project-05.tar', {
+      method: 'POST',
+      body: data.projectFile,
+    });
   };
 
   return (