diff --git a/lib/common/static/instance_live.js b/lib/common/static/instance_live.js
index 23aa5cf..f51b3be 100644
--- a/lib/common/static/instance_live.js
+++ b/lib/common/static/instance_live.js
@@ -1,17 +1,12 @@
 /**
- * embed 壳:SSE 收到后台 tick 后拉 JSON 快照更新 DOM.
- * 同时为 standalone/embed 提供:回前台强制刷新、SSE 假连接兜底.
+ * embed 壳:SSE 收到后台 tick 后拉 JSON 快照更新 DOM,切换 tab 不再重复请求 HTML.
  */
 (function (global) {
   let liveEventSource = null;
   let liveReconnectTimer = null;
   let localLiveVersion = -1;
   let sseConnected = false;
-  let lastLiveEventAt = 0;
   let refreshTimer = null;
-  let pendingWhileHidden = false;
-  /** 超过该毫秒无 live 事件则视为断流,允许 interval 兜底轮询 */
-  const LIVE_STALE_MS = 45000;
 
   function isEmbedShell() {
     return document.body && document.body.getAttribute("data-embed-shell") === "1";
@@ -35,37 +30,20 @@
     if (tab === "options" && global.OptionsPanelLive && typeof global.OptionsPanelLive.refreshSoft === "function") {
       global.OptionsPanelLive.refreshSoft(options);
     }
+    // 数据看板自有 SSE + 快照,不跟 embed live tick 重拉.
   }
 
   function scheduleRefresh(opts) {
-    if (document.hidden) {
-      pendingWhileHidden = true;
-      return;
-    }
     if (refreshTimer) return;
     const options = opts || {};
     refreshTimer = setTimeout(function () {
       refreshTimer = null;
-      if (document.hidden) {
-        pendingWhileHidden = true;
-        return;
-      }
-      pendingWhileHidden = false;
+      if (document.hidden) return;
       refreshTabData(currentTab(), { silent: true, force: !!options.force });
     }, 80);
   }
 
-  function kickRefresh(opts) {
-    pendingWhileHidden = false;
-    if (refreshTimer) {
-      clearTimeout(refreshTimer);
-      refreshTimer = null;
-    }
-    refreshTabData(currentTab(), opts || { silent: true, force: true });
-  }
-
   function onLiveEvent(data) {
-    lastLiveEventAt = Date.now();
     const reason = data && data.reason;
     const ver = Number(data && data.live_version) || 0;
     if (!ver) return;
@@ -81,9 +59,7 @@
 
   function closeLiveStream() {
     if (liveEventSource) {
-      try {
-        liveEventSource.close();
-      } catch (_) {}
+      liveEventSource.close();
       liveEventSource = null;
     }
     if (liveReconnectTimer) {
@@ -104,7 +80,6 @@
     });
     liveEventSource.onopen = function () {
       sseConnected = true;
-      lastLiveEventAt = Date.now();
     };
     liveEventSource.onerror = function () {
       sseConnected = false;
@@ -115,23 +90,7 @@
     };
   }
 
-  function isConnectedFresh() {
-    if (!sseConnected || !liveEventSource) return false;
-    if (!lastLiveEventAt) return false;
-    return Date.now() - lastLiveEventAt < LIVE_STALE_MS;
-  }
-
   function startLive() {
-    document.addEventListener("visibilitychange", function () {
-      if (document.hidden) return;
-      if (isEmbedShell()) {
-        if (!isConnectedFresh()) connectLiveStream();
-      }
-      kickRefresh({ silent: true, force: true });
-    });
-    window.addEventListener("pageshow", function (ev) {
-      if (ev.persisted) kickRefresh({ silent: true, force: true });
-    });
     if (!isEmbedShell()) return;
     connectLiveStream();
   }
@@ -139,8 +98,9 @@
   global.InstanceLive = {
     start: startLive,
     refreshTabData: refreshTabData,
-    kickRefresh: kickRefresh,
-    isConnected: isConnectedFresh,
+    isConnected: function () {
+      return sseConnected;
+    },
   };
 
   if (document.readyState === "loading") {
diff --git a/lib/instance/templates/embed_boot_scripts.html b/lib/instance/templates/embed_boot_scripts.html
index 47581fb..8241233 100644
--- a/lib/instance/templates/embed_boot_scripts.html
+++ b/lib/instance/templates/embed_boot_scripts.html
@@ -1173,17 +1173,6 @@ function accountSnapshotFundingMissing(data){
     return !hasFunding && !hasTotal && !hasTrading;
 }
 let accountSnapshotRetryCount = 0;
-let accountSnapshotInflight = false;
-let priceSnapshotInflight = false;
-
-function fetchJsonWithTimeout(url, timeoutMs) {
-  const ms = timeoutMs != null ? timeoutMs : 25000;
-  const ac = new AbortController();
-  const timer = setTimeout(function () { ac.abort(); }, ms);
-  return fetch(url, { signal: ac.signal, credentials: "same-origin" })
-    .then(function (r) { return r.json(); })
-    .finally(function () { clearTimeout(timer); });
-}
 function applyAccountSnapshot(data){
     if(!data || typeof data !== "object") return;
     if(typeof data.show_perp_funds !== "undefined"){
@@ -1274,10 +1263,8 @@ function applyAccountSnapshot(data){
 }
 function refreshAccountSnapshot(opts){
     const options = opts || {};
-    if(accountSnapshotInflight && !options.force) return;
-    accountSnapshotInflight = true;
     const qs = options.force ? "?force=1" : "";
-    fetchJsonWithTimeout("/api/account_snapshot" + qs, 25000).then(data=>{
+    fetch("/api/account_snapshot" + qs).then(r=>r.json()).then(data=>{
         applyAccountSnapshot(data);
         if(accountSnapshotFundingMissing(data) && !options.force && accountSnapshotRetryCount < 3){
             accountSnapshotRetryCount += 1;
@@ -1290,7 +1277,7 @@ function refreshAccountSnapshot(opts){
             accountSnapshotRetryCount += 1;
             setTimeout(() => refreshAccountSnapshot({ silent: true }), 1200 * accountSnapshotRetryCount);
         }
-    }).finally(()=>{ accountSnapshotInflight = false; });
+    });
 }
 
 const orderSymbolEl = document.getElementById("order-symbol");
@@ -1432,10 +1419,8 @@ refreshOrderDefaults();
 if(typeof initOrderEntryModelSelect === "function") initOrderEntryModelSelect();
 refreshPriceSnapshotConditional();
 function refreshPriceSnapshotConditional(){
-    if(priceSnapshotInflight) return;
-    priceSnapshotInflight = true;
     const page = document.body.getAttribute("data-page") || "";
-    fetchJsonWithTimeout("/api/price_snapshot", 25000).then(data=>{
+    fetch("/api/price_snapshot").then(r=>r.json()).then(data=>{
         const updatedEl = document.getElementById("price-last-updated");
         if(data.updated_at && updatedEl) updatedEl.innerText = data.updated_at;
         if(data.force_close && window.TimeCloseUI && TimeCloseUI.paintForceCloseHeader){
@@ -1489,7 +1474,7 @@ function refreshPriceSnapshotConditional(){
         } else if (typeof data.options_unrealized_pnl !== "undefined") {
             paintRealtimePnlFromSnapshot(data);
         }
-    }).catch(()=>{}).finally(()=>{ priceSnapshotInflight = false; });
+    }).catch(()=>{});
 }
 function formatLiveHoldDurationFromMs(openedMs, nowMs){
     if(openedMs == null || openedMs === "" || !Number.isFinite(Number(openedMs))) return "—";
diff --git a/lib/instance/templates/embed_shell.html b/lib/instance/templates/embed_shell.html
index 619c2bc..07cbbe4 100644
--- a/lib/instance/templates/embed_shell.html
+++ b/lib/instance/templates/embed_shell.html
@@ -171,7 +171,7 @@ const ORDER_ENTRY_MODEL_CODE_TO_CATEGORY = {{ entry_model_code_to_category | toj
 window.__INSTANCE_DISPLAY__ = {{ display | tojson }};
 </script>
 <script src="/static/instance_settings_prefs.js?v=21"></script>
-<script src="/static/instance_live.js?v=7"></script>
+<script src="/static/instance_live.js?v=6"></script>
 <script src="/static/instance_embed.js?v=31"></script>
 <script src="/static/instance_mobile_nav.js?v=2"></script>
 </body>
diff --git a/lib/instance/templates/index.html b/lib/instance/templates/index.html
index 89efc5a..0153cf4 100644
--- a/lib/instance/templates/index.html
+++ b/lib/instance/templates/index.html
@@ -1654,17 +1654,6 @@ function accountSnapshotFundingMissing(data){
     return !hasFunding && !hasTotal && !hasTrading;
 }
 let accountSnapshotRetryCount = 0;
-let accountSnapshotInflight = false;
-let priceSnapshotInflight = false;
-
-function fetchJsonWithTimeout(url, timeoutMs) {
-  const ms = timeoutMs != null ? timeoutMs : 25000;
-  const ac = new AbortController();
-  const timer = setTimeout(function () { ac.abort(); }, ms);
-  return fetch(url, { signal: ac.signal, credentials: "same-origin" })
-    .then(function (r) { return r.json(); })
-    .finally(function () { clearTimeout(timer); });
-}
 function applyAccountSnapshot(data){
     if(!data || typeof data !== "object") return;
     if(typeof data.show_perp_funds !== "undefined"){
@@ -1764,10 +1753,8 @@ function applyAccountSnapshot(data){
 }
 function refreshAccountSnapshot(opts){
     const options = opts || {};
-    if(accountSnapshotInflight && !options.force) return;
-    accountSnapshotInflight = true;
     const qs = options.force ? "?force=1" : "";
-    fetchJsonWithTimeout("/api/account_snapshot" + qs, 25000).then(data=>{
+    fetch("/api/account_snapshot" + qs).then(r=>r.json()).then(data=>{
         applyAccountSnapshot(data);
         if(accountSnapshotFundingMissing(data) && !options.force && accountSnapshotRetryCount < 3){
             accountSnapshotRetryCount += 1;
@@ -1780,7 +1767,7 @@ function refreshAccountSnapshot(opts){
             accountSnapshotRetryCount += 1;
             setTimeout(() => refreshAccountSnapshot({ silent: true }), 1200 * accountSnapshotRetryCount);
         }
-    }).finally(()=>{ accountSnapshotInflight = false; });
+    });
 }
 
 {% if ui_open_guard_enabled %}
@@ -1938,10 +1925,8 @@ refreshOrderDefaults();
 refreshPriceSnapshotConditional();
 setInterval(refreshAccountSnapshot, {{ balance_refresh_seconds * 1000 }});
 function refreshPriceSnapshotConditional(){
-    if(priceSnapshotInflight) return;
-    priceSnapshotInflight = true;
     const page = document.body.getAttribute("data-page") || "";
-    fetchJsonWithTimeout("/api/price_snapshot", 25000).then(data=>{
+    fetch("/api/price_snapshot").then(r=>r.json()).then(data=>{
         const updatedEl = document.getElementById("price-last-updated");
         if(data.updated_at && updatedEl) updatedEl.innerText = data.updated_at;
         if(data.force_close && window.TimeCloseUI && TimeCloseUI.paintForceCloseHeader){
@@ -2015,7 +2000,7 @@ function refreshPriceSnapshotConditional(){
         } else if (typeof data.options_unrealized_pnl !== "undefined") {
             paintRealtimePnlFromSnapshot(data);
         }
-    }).catch(()=>{}).finally(()=>{ priceSnapshotInflight = false; });
+    }).catch(()=>{});
 }
 function formatLiveHoldDurationFromMs(openedMs, nowMs){
     if(openedMs == null || openedMs === "" || !Number.isFinite(Number(openedMs))) return "—";
@@ -2048,7 +2033,6 @@ setInterval(refreshPriceSnapshotConditional, {{ price_refresh_seconds * 1000 }})
 <script src="/static/records_review_page.js?v=4"></script>
 <script src="/static/options_expiry_countdown.js?v=1"></script>
 <script src="/static/instance_dashboard.js?v=5"></script>
-<script src="/static/instance_live.js?v=7"></script>
 <script src="/static/account_ledger.js?v=1"></script>
 <script>
 window.__INSTANCE_DISPLAY__ = {{ display | tojson }};