style(keys): widen the desktop quota column

Increase the quota column width and minimum width from 220px to 260px to give the side-by-side amounts more room.

Validation: all 26 API key listing tests, TypeScript, scoped lint, formatting, and git diff checks passed.

web/src/features/keys/components/api-keys-columns.tsx

@@ -137,8 +137,8 @@ export function useApiKeysColumns(now: number): ColumnDef<ApiKey>[] {
       accessorKey: 'remain_quota',
       header: `${t('Quota')} (${quotaUnit})`,
       cell: ({ row }) => <ApiKeyQuotaCell apiKey={row.original} now={now} />,
-      size: 220,
-      minSize: 220,
+      size: 260,
+      minSize: 260,
     },
     {
       accessorKey: 'group',