Batch-adding multiple .torrent files can rename one torrent to another torrent's name

The issue also appears to still be present in the current master source.

This can be reproduced without using a tracker:

1. Create two different single-file .torrent files locally, e.g.:

   • torrent A with internal name A.bin
   • torrent B with internal name B.bin

2. In TrguiNG, select both .torrent files at the same time in the Add Torrent dialog.

3. Add them, preferably with "Start torrent" disabled.

4. Check their names/files in Transmission.

One torrent may be renamed to the name belonging to another torrent from the batch.

Suspected cause

AddTorrent stores a single torrentName for the entire batch:

useEffect(() => {
    if (torrentData === undefined || torrentData.length < 1) setTorrentName("");
    else setTorrentName(fileSystemSafeName(torrentData[0].name.replace(/\.torrent$/i, "")));
}, [torrentData]);

But while adding multiple torrents, this same torrentName is passed for every td:

Promise.all(torrentData.map(async (td) => {
    return await addMutation.mutateAsync({
        ...
        metainfo: td.metadata,
        ...
        name: torrentName,
        filePath: td.torrentPath,
    });
}));

Then, after Transmission successfully adds each torrent, TrguiNG compares the torrent's actual name against that shared name and issues torrent-rename-path:

const safeName = fileSystemSafeName(vars.name ?? "_");

if (TAURI && added.name != safeName) {
    pathMutation.mutate({
        client: vars.client,
        torrentId: added.id,
        path: added.name,
        name: safeName,
    });
}

As a result, every torrent whose original name differs from the single shared torrentName can be renamed to that name.

For batch additions, it seems the rename name should instead be derived from the corresponding td.name, while the editable torrentName field should probably only apply when exactly one torrent is being added.

For example, something along the lines of:

name: torrentData.length === 1
    ? torrentName
    : fileSystemSafeName(td.name),

or otherwise disabling the custom rename mechanism entirely for multi-torrent additions.