fix(traffic): показывать причину неполного опроса peers

tests/e2e/traffic-peer-warning.spec.ts

@@ -0,0 +1,32 @@
+import { test, expect, type Page } from "@playwright/test"
+const at = new Date("2026-10-12T12:00:00Z")
+async function setup(page: Page, state: "error" | "current" | "legacy", status = "online") {
+  let calls = 0
+  const observations = { rxNow: state === "current", txNow: state === "current", rxSeries: [false, true], txSeries: [false, true],
+    sampledAt: at.toISOString(), lastAttemptAt: at.toISOString(), lastSucceededAt: at.toISOString(),
+    expiresAt: new Date(at.getTime()+90_000).toISOString(), currentState: state === "legacy" ? "unknown" : state,
+    error: state === "error" ? "CHR: HTTP 401 — опрос не выполнен" : "Измерения WireGuard peers недоступны: HTTP 401" }
+  const server = { id: "1", name: "История CHR", site: "TEST", country: "RU", status,
+    rxNow: state === "current" ? 0 : 17, txNow: 0, rxPeak: 5, txPeak: 6, rxTotal: 1, txTotal: 2, sessions: 1,
+    rxSeries: [0,5], txSeries: [0,6], ...(state !== "legacy" ? {observations} : {}) }
+  await page.clock.install({time:at})
+  await page.route("**/health", r=>r.fulfill({json:{ok:true}}))
+  await page.route("**/api/**", r=> {
+    const path = new URL(r.request().url()).pathname
+    if(path.endsWith("/live")) return r.fulfill({status:503,json:{error:"Live недоступен"}})
+    if(path==="/api/traffic/servers")calls++
+    return r.fulfill({json:path==="/api/auth/config"?{required:false}:path==="/api/traffic/servers"?{servers:[server]}:
+      path==="/api/traffic/servers/1"?{server}:path.endsWith("/interfaces")||path==="/api/traffic/bound-interfaces"?{interfaces:[]}:
+      path==="/api/traffic/users"?{users:[]}:path==="/api/servers"?[]:{}})
+  })
+  await page.goto("/traffic")
+  await expect(page.getByRole("heading",{name:"История CHR",exact:true})).toBeVisible()
+  return ()=>calls
+}
+for(const width of[1440,320])test(`Ошибка peers сохраняет подтверждённые interface rates ${width}`,async({page})=>{
+ await page.setViewportSize({width,height:1000});await setup(page,"current")
+ await expect(page.getByRole("status").filter({hasText:"Часть измерений недоступна"})).toContainText("WireGuard peers недоступны: HTTP 401")
+ await expect(page.getByLabel("Скорость выбранного сервера").getByText("0 Кбит/с",{exact:true})).toHaveCount(2)
+ await expect(page.getByRole("region",{name:"История RX/TX"})).toBeVisible()
+ expect(await page.evaluate(()=>document.documentElement.scrollWidth<=innerWidth+1)).toBe(true)
+})