fix(downloads): sort stalled torrents last when sorting by finish time (#6011)

Stalled torrents have time=0 (infinite/never), which raw numeric sort
places between negative (completed) and positive (active) values.
Add a custom sortingFn on the time column that maps 0 to Infinity so
stalled entries always sort last in ascending order and first in
descending order.

Closes #5416

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

packages/widgets/src/downloads/component.tsx

@@ -529,6 +529,16 @@ export default function DownloadClientsWidget({
       },
       {
         ...columnsDefBase({ key: "time", showHeader: true }),
+        sortingFn: (rowA, rowB) => {
+          const timeA = rowA.getValue<ExtendedDownloadClientItem["time"]>("time");
+          const timeB = rowB.getValue<ExtendedDownloadClientItem["time"]>("time");
+          // Map time values to canonical sort keys:
+          // positive = ETA in ms (sort as-is, smaller = sooner)
+          // 0 = stalled/infinite (sort last in ascending = Infinity)
+          // negative = time since completion in ms (sort first in ascending = very negative)
+          const toSortKey = (time: number) => (time === 0 ? Infinity : time);
+          return toSortKey(timeA) - toSortKey(timeB);
+        },
         Cell: ({ cell }) => {
           const time = cell.getValue<ExtendedDownloadClientItem["time"]>();
           return time === 0 ? <IconInfinity size={16} /> : <Text size="xs">{dayjs().add(time).fromNow()}</Text>;