fix: 修复整理弹窗下拉选项无法点击选择的问题

ui/src/app/app.component.ts

@@ -53,6 +53,7 @@ export class AppComponent implements OnInit {
   mode: 'downloads' | 'library' = 'downloads';
   libraryEnabled = false;
   libraryFolders: LibraryFolder[] = [];
+  libraryFolderNames: string[] = [];
   libraryFiles: LibraryFile[] = [];
   libraryFolder = '';  // '' = library root
   libraryLoading = false;
@@ -187,8 +188,11 @@ export class AppComponent implements OnInit {
   loadLibraryFolders(): void {
     if (!this.libraryEnabled) return;
     this.downloads.libraryFolders().subscribe({
-      next: (res) => { this.libraryFolders = res.folders; },
-      error: () => { this.libraryFolders = []; }
+      next: (res) => {
+        this.libraryFolders = res.folders;
+        this.libraryFolderNames = res.folders.map(f => f.name).filter(n => n);
+      },
+      error: () => { this.libraryFolders = []; this.libraryFolderNames = []; }
     });
   }
 
@@ -259,10 +263,6 @@ export class AppComponent implements OnInit {
     this.organizeOpen = false;
   }
 
-  get libraryFolderNames(): string[] {
-    return this.libraryFolders.map(f => f.name).filter(n => n);
-  }
-
   private normalizeName(s: string): string {
     return (s || '').toLowerCase().replace(/[^a-z0-9\u4e00-\u9fff]+/g, ' ').trim();
   }