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/shared/types.ts

@@ -135,6 +135,7 @@ export interface DownloadSummary {
 export interface ParsedPackageInput {
   name: string;
   links: string[];
+  fileNames?: string[];
 }
 
 export interface ContainerImportResult {