fix(ui): использовать серверное время и не подменять отсутствующий Ping

app/(main)/uptime/page.tsx

@@ -1739,6 +1739,7 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
           : ""
         setSpeedRuns((prev) => prev.map((r) => r.id === runId ? ({
           ...r,
+          startedAt: result.createdAt ? Date.parse(result.createdAt) : r.startedAt,
           txAvgMbps: tx,
           rxAvgMbps: rx,
           status: "done",
@@ -1752,7 +1753,8 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
             ...(pingNote ? [pingNote] : []),
           ],
         }) : r))
-        const ts = new Date().toISOString()
+        // Legacy receipts have no server timestamp; retain receipt time for compatibility.
+        const ts = result.createdAt ?? new Date().toISOString()
         setSpeedProbes((prev) => prev.map((p) => p.id === probe.id ? ({
           ...p,
           lastRunAt: ts,
@@ -1762,7 +1764,7 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
           lastError: "",
           lastPingRttMs: ap?.rttMs ?? null,
           lastPingLossPct: ap?.lossPct ?? null,
-          lastPingAt: ts,
+          lastPingAt: ap ? ts : null,
           lastPingError: ap?.error ?? "",
         }) : p))
       } else {
@@ -2166,8 +2168,8 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
                           const maxVal = Math.max(viewTx ?? 0, viewRx ?? 0, 1)
                           const canRun = probe.enabled && !!probe.srcServerId && !!probe.dstServerId && probe.srcServerId !== probe.dstServerId
                           const viewAfterBtPing =
-                            useRun && run.status === "done" && run.afterBtPing
-                              ? run.afterBtPing
+                            useRun && run.status === "done"
+                              ? run.afterBtPing ?? null
                               : probe.lastPingAt
                                 ? {
                                     rttMs: probe.lastPingRttMs ?? null,