support nip94 and fix some bugs

src/utils/createBlobFromFile.tsx

@@ -1,6 +1,6 @@
 import { readBinaryFile } from '@tauri-apps/plugin-fs';
 
-export async function createBlobFromFile(path: string): Promise<Uint8Array> {
+export async function createBlobFromFile(path: string): Promise<Blob> {
   const file = await readBinaryFile(path);
-  return file;
+  return new Blob([file]);
 }