diff --git a/e2e/binance-orderbook/fixtures/binance-futures.js b/e2e/binance-orderbook/fixtures/binance-futures.js
index 96f2db2..af3c5b9 100644
--- a/e2e/binance-orderbook/fixtures/binance-futures.js
+++ b/e2e/binance-orderbook/fixtures/binance-futures.js
@@ -161,30 +161,65 @@ export function renderBinanceFuturesFixture(scenario) {
       }
 
       function closeDialog(action) {
+        document.removeEventListener('keydown', handleDialogKeydown);
         document.querySelector('.bn-modal-root')?.remove();
         state.dialogOpen = false;
         record('dialog-closed', { action });
       }
 
+      function handleDialogKeydown(event) {
+        if (event.key === 'Escape' && state.dialogOpen) closeDialog('escape');
+      }
+
+      function attachDialogHandlers(root) {
+        root.addEventListener('click', (event) => {
+          if (event.target === root) closeDialog('backdrop');
+        });
+        root.querySelector('[data-dialog-action="cancel"]').addEventListener('click', () => closeDialog('cancel'));
+        root.querySelector('[data-dialog-action="confirm"]').addEventListener('click', () => {
+          record('cancel-requested', { symbol: scenario.currentSymbol });
+          setTimeout(() => {
+            if (scenario.host.clearMode === 'currentSymbol') {
+              state.orders = state.orders.filter((item) => item.symbol !== scenario.currentSymbol);
+            }
+            closeDialog('confirm');
+            renderAccountWidget();
+          }, scenario.host.clearDelayMs);
+        });
+      }
+
       function openCancelDialog() {
         if (state.dialogOpen) throw new Error('Fixture opened a duplicate cancel dialog');
+        if (scenario.host.dialogMode === 'missing') {
+          record('dialog-missing');
+          return;
+        }
         state.dialogOpen = true;
         record('dialog-opened');
         const root = document.createElement('div');
         root.className = 'bn-modal-root';
+        const primaryClass = scenario.host.dialogMode === 'missingPrimary'
+          ? ''
+          : ' class="bn-button bn-button__primary"';
+        const extraAction = scenario.host.dialogMode === 'extraAction'
+          ? '<button type="button" data-dialog-action="extra">稍后</button>'
+          : '';
         root.innerHTML = '<div role="dialog"><div class="bn-modal-title">确定取消全部订单？</div>' +
           '<button type="button" data-dialog-action="cancel">取消</button>' +
-          '<button type="button" class="bn-button bn-button__primary" data-dialog-action="confirm"><span>确认</span></button></div>';
+          '<button type="button"' + primaryClass + ' data-dialog-action="confirm"><span>确认</span></button>' +
+          extraAction + '</div>';
         document.body.append(root);
-        root.querySelector('[data-dialog-action="cancel"]').addEventListener('click', () => closeDialog('cancel'));
-        root.querySelector('[data-dialog-action="confirm"]').addEventListener('click', () => {
-          record('cancel-requested', { symbol: scenario.currentSymbol });
+        document.addEventListener('keydown', handleDialogKeydown);
+        attachDialogHandlers(root);
+        if (scenario.host.dialogReplacementDelayMs !== null) {
           setTimeout(() => {
-            state.orders = state.orders.filter((item) => item.symbol !== scenario.currentSymbol);
-            closeDialog('confirm');
-            renderAccountWidget();
-          }, scenario.host.clearDelayMs);
-        });
+            if (!state.dialogOpen || !root.isConnected) return;
+            const replacement = root.cloneNode(true);
+            root.replaceWith(replacement);
+            attachDialogHandlers(replacement);
+            record('dialog-replaced');
+          }, scenario.host.dialogReplacementDelayMs);
+        }
       }
 
       const chart = {
diff --git a/e2e/binance-orderbook/helpers/userscript-page.js b/e2e/binance-orderbook/helpers/userscript-page.js
index 70de455..71b5ccd 100644
--- a/e2e/binance-orderbook/helpers/userscript-page.js
+++ b/e2e/binance-orderbook/helpers/userscript-page.js
@@ -32,14 +32,14 @@ export async function openUserscriptScenario(page, scenario) {
       status: 200,
       contentType: 'application/json',
       body: JSON.stringify({
-        symbols: [{
-          symbol: scenario.currentSymbol,
+        symbols: [scenario.currentSymbol, 'BTCUSDT'].map((symbol) => ({
+          symbol,
           filters: [
             { filterType: 'LOT_SIZE', minQty: '0.01', stepSize: '0.01' },
             { filterType: 'MARKET_LOT_SIZE', minQty: '0.01', stepSize: '0.01' },
             { filterType: 'MIN_NOTIONAL', notional: '5' },
           ],
-        }],
+        })),
       }),
     });
   });
diff --git a/e2e/binance-orderbook/scenarios/cancel-current-symbol.js b/e2e/binance-orderbook/scenarios/cancel-current-symbol.js
index a805125..3d866a1 100644
--- a/e2e/binance-orderbook/scenarios/cancel-current-symbol.js
+++ b/e2e/binance-orderbook/scenarios/cancel-current-symbol.js
@@ -50,6 +50,9 @@ export function createCancelScenario(overrides = {}) {
     host: {
       mutationDelayMs: 0,
       clearDelayMs: 0,
+      dialogMode: 'normal',
+      dialogReplacementDelayMs: null,
+      clearMode: 'currentSymbol',
       ...overrides.host,
     },
   };
@@ -63,5 +66,18 @@ export function createCancelScenario(overrides = {}) {
   if (!Array.isArray(scenario.positions) || !Array.isArray(scenario.orders)) {
     throw new Error('Scenario positions and orders must be arrays');
   }
+  if (!['normal', 'missing', 'extraAction', 'missingPrimary'].includes(scenario.host.dialogMode)) {
+    throw new Error(`Unsupported dialog mode: ${scenario.host.dialogMode}`);
+  }
+  if (!['currentSymbol', 'none'].includes(scenario.host.clearMode)) {
+    throw new Error(`Unsupported clear mode: ${scenario.host.clearMode}`);
+  }
+  if (
+    scenario.host.dialogReplacementDelayMs !== null
+    && (!Number.isInteger(scenario.host.dialogReplacementDelayMs)
+      || scenario.host.dialogReplacementDelayMs < 0)
+  ) {
+    throw new Error('Dialog replacement delay must be a non-negative integer or null');
+  }
   return scenario;
 }
diff --git a/e2e/binance-orderbook/specs/cancel-current-symbol.pw.js b/e2e/binance-orderbook/specs/cancel-current-symbol.pw.js
index 100f60b..ce79c35 100644
--- a/e2e/binance-orderbook/specs/cancel-current-symbol.pw.js
+++ b/e2e/binance-orderbook/specs/cancel-current-symbol.pw.js
@@ -1,6 +1,7 @@
 import { test, expect } from '@playwright/test';
 
 import {
+  OTHER_SYMBOL,
   ORDER_SETS,
   POSITION_SETS,
   createCancelScenario,
@@ -166,3 +167,208 @@ test('the cancel workflow remains single-flight during rapid repeated clicks', a
   await expectRestoredState(page, scenario);
   expect(errors).toEqual([]);
 });
+
+for (const closeMethod of ['Escape', 'backdrop']) {
+  test(`closing the native dialog with ${closeMethod} is a cancellation and restores UI`, async ({ page }) => {
+    const scenario = createCancelScenario({
+      positions: POSITION_SETS.both,
+      orders: ORDER_SETS.both,
+      ui: {
+        hideOtherSymbols: false,
+        accountTab: 'positions',
+        openOrdersSubTab: 'conditional',
+        showOrders: true,
+      },
+    });
+    const { errors } = await openUserscriptScenario(page, scenario);
+
+    await page.getByRole('button', { name: '撤本币挂单' }).click();
+    await expect(page.getByRole('dialog')).toBeVisible();
+    if (closeMethod === 'Escape') {
+      await page.keyboard.press('Escape');
+    } else {
+      await page.locator('.bn-modal-root').click({ position: { x: 4, y: 4 } });
+    }
+    await expect(page.getByText('HYPEUSDT 已取消撤单，已恢复页面状态')).toBeVisible();
+
+    const state = await readFixtureState(page);
+    expect(state.orders).toEqual(ORDER_SETS.both);
+    expect(state.events.filter((event) => event.type === 'cancel-requested')).toEqual([]);
+    await expectRestoredState(page, scenario);
+    expect(errors).toEqual([]);
+  });
+}
+
+test('a BFCache pagehide does not abort the active native dialog', async ({ page }) => {
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.current,
+    orders: ORDER_SETS.current,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await expect(page.getByRole('dialog')).toBeVisible();
+  await page.evaluate(() => window.dispatchEvent(new PageTransitionEvent('pagehide', {
+    persisted: true,
+  })));
+  await expect(page.getByRole('dialog')).toBeVisible();
+  await page.getByRole('button', { name: '取消' }).click();
+  await expect(page.getByText('HYPEUSDT 已取消撤单，已恢复页面状态')).toBeVisible();
+  await expectRestoredState(page, scenario);
+  expect(errors).toEqual([]);
+});
+
+test('a real pagehide aborts dialog tracking without mutating orders', async ({ page }) => {
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.current,
+    orders: ORDER_SETS.current,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await expect(page.getByRole('dialog')).toBeVisible();
+  await page.evaluate(() => window.dispatchEvent(new PageTransitionEvent('pagehide', {
+    persisted: false,
+  })));
+  await expect(page.getByText('HYPEUSDT 页面已离开，撤单确认跟踪已停止')).toBeVisible();
+
+  const state = await readFixtureState(page);
+  expect(state.orders).toEqual(ORDER_SETS.current);
+  expect(state.events.filter((event) => event.type === 'cancel-requested')).toEqual([]);
+  expect(state.showOrders).toBe(false);
+  expect(state.hideOtherSymbols).toBe(true);
+  expect(errors).toEqual([]);
+});
+
+test('a missing native dialog stops cleanly and restores temporary UI state', async ({ page }) => {
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.current,
+    orders: ORDER_SETS.current,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+    host: { dialogMode: 'missing' },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await expect(page.getByText('HYPEUSDT 未识别到撤单确认弹窗，未继续撤单流程')).toBeVisible({
+    timeout: 3_000,
+  });
+
+  const state = await readFixtureState(page);
+  expect(state.orders).toEqual(ORDER_SETS.current);
+  await expectRestoredState(page, scenario);
+  expect(errors).toEqual([]);
+});
+
+for (const dialogMode of ['extraAction', 'missingPrimary']) {
+  test(`an invalid ${dialogMode} dialog contract fails explicitly and preserves recovery state`, async ({ page }) => {
+    const scenario = createCancelScenario({
+      positions: POSITION_SETS.current,
+      orders: ORDER_SETS.current,
+      ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+      host: { dialogMode },
+    });
+    const { errors } = await openUserscriptScenario(page, scenario);
+
+    await page.getByRole('button', { name: '撤本币挂单' }).click();
+    await expect(page.getByText(
+      'HYPEUSDT 撤单确认弹窗结构异常，图表当前委托保持隐藏',
+    )).toBeVisible();
+
+    const state = await readFixtureState(page);
+    expect(state.orders).toEqual(ORDER_SETS.current);
+    expect(state.showOrders).toBe(false);
+    expect(state.hideOtherSymbols).toBe(true);
+    expect(errors).toEqual([]);
+  });
+}
+
+test('a delayed confirmation keeps visible progress and clears only the current symbol', async ({ page }) => {
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.both,
+    orders: ORDER_SETS.both,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+    host: { clearDelayMs: 250 },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await page.getByRole('button', { name: '确认' }).click();
+  await expect(page.getByText('HYPEUSDT 已确认撤单，等待当前币挂单清空')).toBeVisible();
+  await expect(page.getByText('HYPEUSDT 撤单流程结束，已恢复筛选状态')).toBeVisible();
+
+  const state = await readFixtureState(page);
+  expect(state.orders).toEqual(otherSymbolOrders(scenario));
+  await expectRestoredState(page, scenario);
+  expect(errors).toEqual([]);
+});
+
+test('dialog tracking survives React replacing the native dialog subtree', async ({ page }) => {
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.current,
+    orders: ORDER_SETS.current,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+    host: { dialogReplacementDelayMs: 20 },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await expect.poll(async () => (
+    await readFixtureState(page)
+  ).events.filter((event) => event.type === 'dialog-replaced').length).toBe(1);
+  await page.getByRole('button', { name: '取消' }).click();
+  await expect(page.getByText('HYPEUSDT 已取消撤单，已恢复页面状态')).toBeVisible();
+
+  const state = await readFixtureState(page);
+  expect(state.orders).toEqual(ORDER_SETS.current);
+  await expectRestoredState(page, scenario);
+  expect(errors).toEqual([]);
+});
+
+test('a confirmed dialog that does not clear current orders reports incomplete cancellation', async ({ page }) => {
+  test.setTimeout(15_000);
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.current,
+    orders: ORDER_SETS.current,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+    host: { clearMode: 'none' },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await page.getByRole('button', { name: '确认' }).click();
+  await expect(page.getByText('HYPEUSDT 当前币挂单仍存在，撤单流程未完成')).toBeVisible({
+    timeout: 10_000,
+  });
+
+  const state = await readFixtureState(page);
+  expect(state.orders).toEqual(ORDER_SETS.current);
+  await expectRestoredState(page, scenario);
+  expect(errors).toEqual([]);
+});
+
+test('a symbol change before the dialog decision stops the captured-symbol workflow', async ({ page }) => {
+  const scenario = createCancelScenario({
+    positions: POSITION_SETS.both,
+    orders: ORDER_SETS.both,
+    ui: { hideOtherSymbols: false, accountTab: 'positions', showOrders: true },
+  });
+  const { errors } = await openUserscriptScenario(page, scenario);
+
+  await page.getByRole('button', { name: '撤本币挂单' }).click();
+  await expect(page.getByRole('dialog')).toBeVisible();
+  await page.evaluate((symbol) => {
+    history.pushState({}, '', `/zh-CN/futures/${symbol}`);
+  }, OTHER_SYMBOL);
+  await expect.poll(() => page.evaluate(() => location.pathname)).toContain(OTHER_SYMBOL);
+  await page.waitForTimeout(600);
+  await page.getByRole('button', { name: '取消' }).click();
+  await expect(page.getByText('确认撤单前交易对已变化')).toBeVisible();
+
+  const state = await readFixtureState(page);
+  expect(state.orders).toEqual(ORDER_SETS.both);
+  expect(state.events.filter((event) => event.type === 'cancel-requested')).toEqual([]);
+  expect(errors).toEqual([]);
+});