fix(api): сохранить неизвестные значения истории скорости

components/data-grids/uptime-speed-history-data-grid.tsx

@@ -29,8 +29,8 @@ export interface SpeedTestRunRow {
   protocol: "tcp" | "udp"
   direction: "transmit" | "receive" | "both"
   durationSec: number
-  txAvgMbps: number
-  rxAvgMbps: number
+  txAvgMbps: number | null
+  rxAvgMbps: number | null
   status: "running" | "done" | "error"
   afterBtPing?: { rttMs: number | null; lossPct: number | null; error: string | null } | null
   srcInterfaceAddress?: string | null
@@ -136,11 +136,13 @@ function UptimeSpeedHistoryDataGrid({ runs, servers }: UptimeSpeedHistoryDataGri
       },
       {
         id: "txAvgMbps",
-        accessorKey: "txAvgMbps",
+        accessorFn: row => row.txAvgMbps ?? undefined,
+        sortUndefined: "last",
         header: ({ column }) => <DataGridSortHeader column={column} title="TX avg" />,
         cell: ({ row }) => {
           const run = row.original
-          const maxVal = Math.max(run.txAvgMbps, run.rxAvgMbps, 1)
+          if (run.txAvgMbps === null) return <span className="text-xs text-muted-foreground">Неизвестно</span>
+          const maxVal = Math.max(run.txAvgMbps ?? 0, run.rxAvgMbps ?? 0, 1)
           return (
             <div className="flex items-center gap-2 min-w-[120px]">
               <div className="w-16 h-1.5 rounded-full bg-muted overflow-hidden">
@@ -159,11 +161,13 @@ function UptimeSpeedHistoryDataGrid({ runs, servers }: UptimeSpeedHistoryDataGri
       },
       {
         id: "rxAvgMbps",
-        accessorKey: "rxAvgMbps",
+        accessorFn: row => row.rxAvgMbps ?? undefined,
+        sortUndefined: "last",
         header: ({ column }) => <DataGridSortHeader column={column} title="RX avg" />,
         cell: ({ row }) => {
           const run = row.original
-          const maxVal = Math.max(run.txAvgMbps, run.rxAvgMbps, 1)
+          if (run.rxAvgMbps === null) return <span className="text-xs text-muted-foreground">Неизвестно</span>
+          const maxVal = Math.max(run.txAvgMbps ?? 0, run.rxAvgMbps ?? 0, 1)
           return (
             <div className="flex items-center gap-2 min-w-[120px]">
               <div className="w-16 h-1.5 rounded-full bg-muted overflow-hidden">