fix import zst create dir

app/app-detail.component.ts

@@ -217,6 +217,7 @@ export class AppDetailComponent implements OnInit, OnChanges {
         if (ext === '.zst') {
             try {
                 console.log('extracting import file');
+                await this.appsService.createDirectory(option.installDir);
                 await new Promise((resolve, reject) => {
                     targetApp.status.status = 'installing';
                     this.appsService.extract(this.import_path, option.installDir).subscribe(
@@ -251,6 +252,7 @@ export class AppDetailComponent implements OnInit, OnChanges {
         } catch (e) {
             console.error(e);
             new Notification(targetApp.name, {body: '导入失败 ' + e.message});
+            targetApp.reset();
         }
     }