diff --git a/shine-UI/js/app.js b/shine-UI/js/app.js
index bd84128..d1795f1 100644
--- a/shine-UI/js/app.js
+++ b/shine-UI/js/app.js
@@ -103,14 +103,11 @@ const screenEl = document.getElementById('app-screen');
 const toolbarEl = document.getElementById('toolbar-slot');
 const appShellEl = document.querySelector('.app-shell');
 
-const VERSION_CHECK_INTERVAL_MS = 10 * 60 * 1000;
 const CONNECTION_CHECK_INTERVAL_MS = 20 * 1000;
 const CURRENT_BUILD_HASH = String(window.__SHINE_BUILD_HASH__ || '').trim();
 
 let currentCleanup = null;
 let pingIntervalId = null;
-let versionCheckIntervalId = null;
-let versionCheckInFlight = false;
 let reconnectIntervalId = null;
 let sessionRuntimeStarted = false;
 let connectionState = '';
@@ -120,6 +117,7 @@ let connectionStatusCountdownId = null;
 let connectionNextRetryAtMs = 0;
 let connectionCheckInFlight = false;
 let wsSessionRestoreInFlight = null;
+let uiUpdateReloadScheduled = false;
 
 setClientErrorTransport((payload) => authService.reportClientError(payload));
 initPwaInstallPromptHandling();
@@ -236,48 +234,21 @@ async function triggerImmediateConnectionRetry() {
   await checkConnectionHealth();
 }
 
-function parseBuildHashFromHtml(html) {
-  const text = String(html || '');
-  const m = text.match(/window\.__SHINE_BUILD_HASH__\s*=\s*'([^']+)'/);
-  return String(m?.[1] || '').trim();
-}
+function checkAndReloadIfUiUpdated(remoteHashRaw) {
+  if (uiUpdateReloadScheduled) return;
+  const remoteHash = String(remoteHashRaw || '').trim();
+  if (!remoteHash || !CURRENT_BUILD_HASH || remoteHash === CURRENT_BUILD_HASH) return;
 
-async function checkUiVersionAndReload() {
-  if (versionCheckInFlight) return;
-  versionCheckInFlight = true;
-  try {
-    const resp = await fetch(`./index.html?versionCheckTs=${Date.now()}`, { cache: 'no-store' });
-    if (!resp.ok) return;
-    const html = await resp.text();
-    const remoteHash = parseBuildHashFromHtml(html);
-    if (!remoteHash || !CURRENT_BUILD_HASH) return;
-    if (remoteHash === CURRENT_BUILD_HASH) return;
-
-    addAppLogEntry({
-      level: 'info',
-      source: 'version-check',
-      message: `Обнаружена новая версия UI: ${CURRENT_BUILD_HASH} -> ${remoteHash}`,
-    });
-    setConnectionStatus('updating');
-    window.setTimeout(() => {
-      window.location.reload();
-    }, 600);
-  } catch {
-    // ignore transient network/version-check errors
-  } finally {
-    versionCheckInFlight = false;
-  }
-}
-
-function startVersionMonitor() {
-  if (versionCheckIntervalId) {
-    window.clearInterval(versionCheckIntervalId);
-    versionCheckIntervalId = null;
-  }
-  void checkUiVersionAndReload();
-  versionCheckIntervalId = window.setInterval(() => {
-    void checkUiVersionAndReload();
-  }, VERSION_CHECK_INTERVAL_MS);
+  uiUpdateReloadScheduled = true;
+  addAppLogEntry({
+    level: 'info',
+    source: 'version-check',
+    message: `Обнаружена новая версия UI (через Ping): ${CURRENT_BUILD_HASH} -> ${remoteHash}`,
+  });
+  setConnectionStatus('updating');
+  window.setTimeout(() => {
+    window.location.reload();
+  }, 600);
 }
 
 async function checkConnectionHealth() {
@@ -297,7 +268,9 @@ async function checkConnectionHealth() {
         return;
       }
     }
-    await authService.ws.request('Ping', { ts: Date.now() }, 7000);
+    const pingResp = await authService.ws.request('Ping', { ts: Date.now() }, 7000);
+    const remoteUiBuildHash = pingResp?.payload?.uiBuildHash || pingResp?.uiBuildHash || '';
+    checkAndReloadIfUiUpdated(remoteUiBuildHash);
     setConnectionStatus('connected');
   } catch {
     connectionStatusText = '';
@@ -817,7 +790,6 @@ async function init() {
 
   await tryAutoLogin();
   await hydrateMessagesFromStore();
-  startVersionMonitor();
   startConnectionMonitor();
   await ensureSessionRuntimeStarted();
 
@@ -830,7 +802,6 @@ async function init() {
   window.addEventListener('hashchange', renderApp);
   document.addEventListener('visibilitychange', () => {
     if (document.visibilityState !== 'visible') return;
-    void checkUiVersionAndReload();
     void checkConnectionHealth();
   });
 }
diff --git a/shine-UI/js/services/pwa-push-service.js b/shine-UI/js/services/pwa-push-service.js
index ff5d971..2e2eb1b 100644
--- a/shine-UI/js/services/pwa-push-service.js
+++ b/shine-UI/js/services/pwa-push-service.js
@@ -1,49 +1,4 @@
 const LS_KEY = 'shine-ui-webpush-subscription-v1';
-const SW_UPDATE_CHECK_INTERVAL_MS = 5 * 60 * 1000;
-let swUpdateIntervalId = null;
-let controllerChangeHandled = false;
-
-function setupServiceWorkerAutoUpdate(registration, log) {
-  if (!registration) return;
-
-  if (!controllerChangeHandled && 'serviceWorker' in navigator) {
-    controllerChangeHandled = true;
-    navigator.serviceWorker.addEventListener('controllerchange', () => {
-      log({
-        level: 'info',
-        source: 'web-push',
-        message: 'Service Worker обновился, перезагружаем UI',
-      });
-      window.location.reload();
-    });
-  }
-
-  registration.addEventListener('updatefound', () => {
-    const installing = registration.installing;
-    if (!installing) return;
-    log({
-      level: 'info',
-      source: 'web-push',
-      message: 'Найдено обновление Service Worker',
-    });
-  });
-
-  if (swUpdateIntervalId) {
-    window.clearInterval(swUpdateIntervalId);
-    swUpdateIntervalId = null;
-  }
-
-  const checkNow = () => {
-    registration.update().catch(() => {});
-  };
-
-  checkNow();
-  swUpdateIntervalId = window.setInterval(checkNow, SW_UPDATE_CHECK_INTERVAL_MS);
-  document.addEventListener('visibilitychange', () => {
-    if (document.visibilityState !== 'visible') return;
-    checkNow();
-  });
-}
 
 function urlBase64ToUint8Array(base64String) {
   const padding = '='.repeat((4 - (base64String.length % 4)) % 4);
@@ -81,16 +36,13 @@ export async function initPwaPush({ authService, onLog = null }) {
   }
 
   try {
-    const registration = await navigator.serviceWorker.register('./firebase-messaging-sw.js', {
-      updateViaCache: 'none',
-    });
+    const registration = await navigator.serviceWorker.register('./firebase-messaging-sw.js');
     log({
       level: 'info',
       source: 'web-push',
       message: 'Service Worker зарегистрирован',
       details: { scope: registration.scope },
     });
-    setupServiceWorkerAutoUpdate(registration, log);
 
     const permission = await Notification.requestPermission();
     if (permission !== 'granted') {
diff --git a/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/Net_Ping_Handler.java b/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/Net_Ping_Handler.java
index e106a41..afb122d 100644
--- a/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/Net_Ping_Handler.java
+++ b/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/Net_Ping_Handler.java
@@ -7,12 +7,26 @@ import server.logic.ws_protocol.JSON.handlers.JsonMessageHandler;
 import server.logic.ws_protocol.JSON.handlers.system.entyties.Net_Ping_Request;
 import server.logic.ws_protocol.JSON.handlers.system.entyties.Net_Ping_Response;
 import server.logic.ws_protocol.WireCodes;
+import utils.config.AppConfig;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * Ping — keep-alive.
- * В ответ кладём только ts (текущее время сервера в мс).
+ * В ответ кладём:
+ * - ts (текущее время сервера в мс)
+ * - uiBuildHash (текущий build hash UI, если удалось определить)
  */
 public class Net_Ping_Handler implements JsonMessageHandler {
+    private static final AppConfig CONFIG = AppConfig.getInstance();
+    private static final String DEFAULT_UI_INDEX_PATH = "/home/user/docker/caddyFile/sites/shine-UI/index.html";
+    private static final Pattern UI_HASH_PATTERN = Pattern.compile("window\\.__SHINE_BUILD_HASH__\\s*=\\s*'([^']+)'");
+    private static volatile String cachedUiBuildHash = "";
+    private static volatile long cachedUiIndexMtimeMs = -1L;
 
     @Override
     public Net_Response handle(Net_Request baseRequest, ConnectionContext ctx) {
@@ -25,7 +39,33 @@ public class Net_Ping_Handler implements JsonMessageHandler {
 
         // ничего не проверяем, просто отдаём серверное время
         resp.setTs(System.currentTimeMillis());
+        resp.setUiBuildHash(resolveUiBuildHash());
 
         return resp;
     }
-}
\ No newline at end of file
+
+    private static String resolveUiBuildHash() {
+        String indexPathRaw = CONFIG.getParam("server.ui.indexPath");
+        String indexPath = (indexPathRaw == null || indexPathRaw.isBlank())
+                ? DEFAULT_UI_INDEX_PATH
+                : indexPathRaw.trim();
+        try {
+            Path path = Path.of(indexPath);
+            long mtime = Files.getLastModifiedTime(path).toMillis();
+            if (mtime == cachedUiIndexMtimeMs && !cachedUiBuildHash.isBlank()) {
+                return cachedUiBuildHash;
+            }
+
+            String html = Files.readString(path, StandardCharsets.UTF_8);
+            Matcher matcher = UI_HASH_PATTERN.matcher(html);
+            String found = matcher.find() ? String.valueOf(matcher.group(1)).trim() : "";
+
+            cachedUiIndexMtimeMs = mtime;
+            cachedUiBuildHash = found;
+            return found;
+        } catch (Exception ignored) {
+            String fallback = CONFIG.getParam("server.ui.buildHash");
+            return fallback == null ? "" : fallback.trim();
+        }
+    }
+}
diff --git a/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/entyties/Net_Ping_Response.java b/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/entyties/Net_Ping_Response.java
index 9f443cd..f85145a 100644
--- a/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/entyties/Net_Ping_Response.java
+++ b/shine-server-net-protocol/src/main/java/server/logic/ws_protocol/JSON/handlers/system/entyties/Net_Ping_Response.java
@@ -8,13 +8,20 @@ import server.logic.ws_protocol.JSON.entyties.Net_Response;
  *   "op": "Ping",
  *   "requestId": "req-1",
  *   "status": 200,
- *   "payload": { "ts": 1700000000123 }
+ *   "payload": {
+ *     "ts": 1700000000123,
+ *     "uiBuildHash": "20260422164933"
+ *   }
  * }
  */
 public class Net_Ping_Response extends Net_Response {
 
     private long ts;
+    private String uiBuildHash;
 
     public long getTs() { return ts; }
     public void setTs(long ts) { this.ts = ts; }
-}
\ No newline at end of file
+
+    public String getUiBuildHash() { return uiBuildHash; }
+    public void setUiBuildHash(String uiBuildHash) { this.uiBuildHash = uiBuildHash; }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index b1e9e86..7143818 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -12,6 +12,8 @@ server.info.physicalRegion=
 server.info.description=
 server.info.origin=
 server.info.extraInfo=
+server.ui.indexPath=/home/user/docker/caddyFile/sites/shine-UI/index.html
+server.ui.buildHash=
 
 # Web Push (VAPID)
 webpush.vapid.public=BOdoWZndZRaNe9kyUFsJ5-xEfFABXNKennAKg15Z7ycAwUIQ7yDV_sIWWYJCwJriN4g9oU-CyJPrn1U6lfxuDbI