feat(InterfaceSpeedTest, MikrotikConfigRoutes): enhance speed test functionality with cache handling and force refresh options

backend/routes/mikrotikConfigRoutes.js

@@ -851,7 +851,7 @@ function parseSpeedToBps(val) {
  */
 async function speedTestViaTunnel(req, res) {
   try {
-    const { serverId, interfaceName } = req.body || {};
+    const { serverId, interfaceName, cacheOnly, forceRefresh } = req.body || {};
     let { durationSeconds } = req.body || {};
 
     if (!serverId || !interfaceName) {
@@ -864,6 +864,39 @@ async function speedTestViaTunnel(req, res) {
     }
 
     const uiSettings = await loadUiSettings();
+    const cacheMinutes = Math.max(
+      0,
+      parseInt(uiSettings.interfaceSpeedTestCacheMinutes, 10) || 0
+    );
+    const cacheKey =
+      cacheMinutes > 0
+        ? speedTestCacheKey(serverId, interfaceName)
+        : null;
+
+    // При выборе сервера/интерфейса — только кеш. При нажатии «Замерить» — принудительно новый замер (forceRefresh).
+    const skipCacheRead = forceRefresh === true;
+
+    if (!skipCacheRead && cacheKey) {
+      try {
+        const raw = await readS3TextObject(cacheKey).catch(() => null);
+        if (raw?.body) {
+          const cached = JSON.parse(raw.body);
+          const cachedAt =
+            typeof cached.cachedAt === 'number' ? cached.cachedAt : 0;
+          const ttlMs = cacheMinutes * 60 * 1000;
+          if (cachedAt && Date.now() - cachedAt < ttlMs) {
+            return res.json({ ...cached, cached: true });
+          }
+        }
+      } catch (_) {
+        // Если кеш не прочитался — продолжаем без него
+      }
+    }
+
+    if (cacheOnly === true) {
+      return res.json({ ok: false, notInCache: true });
+    }
+
     const defaultDuration = Math.max(
       1,
       Math.min(
@@ -882,32 +915,6 @@ async function speedTestViaTunnel(req, res) {
       )
     );
 
-    const cacheMinutes = Math.max(
-      0,
-      parseInt(uiSettings.interfaceSpeedTestCacheMinutes, 10) || 0
-    );
-    const cacheKey =
-      cacheMinutes > 0
-        ? speedTestCacheKey(serverId, interfaceName)
-        : null;
-
-    if (cacheKey) {
-      try {
-        const raw = await readS3TextObject(cacheKey).catch(() => null);
-        if (raw?.body) {
-          const cached = JSON.parse(raw.body);
-          const cachedAt =
-            typeof cached.cachedAt === 'number' ? cached.cachedAt : 0;
-          const ttlMs = cacheMinutes * 60 * 1000;
-          if (cachedAt && Date.now() - cachedAt < ttlMs) {
-            return res.json({ ...cached, cached: true });
-          }
-        }
-      } catch (_) {
-        // Если кеш не прочитался — продолжаем без него
-      }
-    }
-
     const config = await loadNetworkConfig();
     const tunnelIfaces = Array.isArray(config.tunnelInterfaces)
       ? config.tunnelInterfaces