Release v1.4.37 with DLC filenames, instant delete, version display

- Parse <filename> tags from DLC XML for proper file names instead of
  deriving from opaque URLs (fixes download.bin display)
- Optimistic UI removal for package/item delete (instant feedback)
- Show app version in header ("Multi Debrid Downloader vX.X.X")

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/app-controller.ts

@@ -165,7 +165,8 @@ export class AppController {
     const packages = await importDlcContainers(filePaths);
     const merged: ParsedPackageInput[] = packages.map((pkg) => ({
       name: pkg.name,
-      links: pkg.links
+      links: pkg.links,
+      ...(pkg.fileNames ? { fileNames: pkg.fileNames } : {})
     }));
     const result = this.manager.addPackages(merged);
     return result;