fix(ui): различать нулевые и неизвестные счётчики WireGuard

backend/src/services/wireguard-live.ts

@@ -1,3 +1,4 @@
+import { parseWireGuardBytes as parseBytes } from "./wireguard-observed-values.js"
 import {boundedCompleteCount,completeCollectionCount} from "./complete-count.js"
 import { eq } from "drizzle-orm"
 import { db } from "../db/index.js"
@@ -53,12 +54,6 @@ interface RosIpAddress {
   disabled?: string
 }
 
-function parseBytes(v: string | undefined): number | undefined {
-  if (v == null || v === "") return undefined
-  const n = Number.parseInt(v, 10)
-  return Number.isFinite(n) ? n : undefined
-}
-
 function mapPeer(p: RosWireGuardPeer, idx: number): WgPeerDto {
   const rosId = String(p[".id"] ?? `peer-${idx}`)
   const allowed = (p["allowed-address"] ?? "")

backend/src/services/wireguard-observed-values.test.ts

@@ -0,0 +1,9 @@
+import { test } from "node:test"
+import assert from "node:assert/strict"
+import { parseWireGuardBytes } from "./wireguard-observed-values.js"
+test("WireGuard byte counters preserve zero and reject partial, negative or unsafe values", () => {
+  assert.equal(parseWireGuardBytes("0"), 0)
+  assert.equal(parseWireGuardBytes(" 1234 "), 1234)
+  assert.equal(parseWireGuardBytes("9007199254740991"), Number.MAX_SAFE_INTEGER)
+  for (const raw of [undefined, null, 0, {}, "", " ", "12junk", "1.5", "-1", "Infinity", "1e3", "9007199254740992"]) assert.equal(parseWireGuardBytes(raw), undefined)
+})

backend/src/services/wireguard-observed-values.ts

@@ -0,0 +1,6 @@
+// RouterOS byte counters are whole decimal values; absent or malformed values are unknown.
+export function parseWireGuardBytes(raw: unknown): number | undefined {
+  if (typeof raw !== "string" || !/^[0-9]+$/.test(raw.trim())) return undefined
+  const value = Number(raw.trim())
+  return Number.isSafeInteger(value) && value >= 0 ? value : undefined
+}