Fixed download sizes and directory highlighting

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Backend/Main.py

@@ -800,12 +800,9 @@ def GetDownloadEndpoint(Root: str, Path: str, CurrentUser: dict = Depends(GetCur
     EncodedName = quote(DownloadName)
     Headers = {"Content-Disposition": f"attachment; filename*=UTF-8''{EncodedName}"}
 
-    def IterateDownload():
-        with EntryPath.open("rb") as SourceFile:
-            while Chunk := SourceFile.read(1024 * 1024):
-                yield Chunk
-
-    return StreamingResponse(IterateDownload(), media_type=MimeType, headers=Headers)
+    # FileResponse sends Content-Length, so browsers can show the size and
+    # time left (a plain stream showed them as unknown).
+    return FileResponse(EntryPath, media_type=MimeType, headers=Headers)
 
 
 @Application.get("/api/book")