fix(overlay): stabilize macOS focus handoff and sidebar Yomitan pause

- Keep overlay visible during macOS foreground probe after overlay blur
- Hold sidebar hover-pause while a Yomitan lookup popup remains open

src/core/services/overlay-visibility.test.ts

@@ -1260,6 +1260,54 @@ test('macOS tracked overlay hides when mpv loses foreground', () => {
   assert.ok(!calls.includes('show'));
 });
 
+test('macOS keeps visible overlay stable while probing frontmost app after overlay blur', () => {
+  const { window, calls } = createMainWindowRecorder();
+  const tracker: WindowTrackerStub = {
+    isTracking: () => true,
+    getGeometry: () => ({ x: 0, y: 0, width: 1280, height: 720 }),
+    isTargetWindowFocused: () => false,
+    isTargetWindowMinimized: () => false,
+  };
+
+  window.show();
+  calls.length = 0;
+
+  updateVisibleOverlayVisibility({
+    visibleOverlayVisible: true,
+    mainWindow: window as never,
+    windowTracker: tracker as never,
+    trackerNotReadyWarningShown: false,
+    setTrackerNotReadyWarningShown: () => {},
+    updateVisibleOverlayBounds: () => {
+      calls.push('update-bounds');
+    },
+    ensureOverlayWindowLevel: () => {
+      calls.push('ensure-level');
+    },
+    syncPrimaryOverlayWindowLayer: () => {
+      calls.push('sync-layer');
+    },
+    enforceOverlayLayerOrder: () => {
+      calls.push('enforce-order');
+    },
+    syncOverlayShortcuts: () => {
+      calls.push('sync-shortcuts');
+    },
+    isMacOSPlatform: true,
+    isWindowsPlatform: false,
+    macOSForegroundProbeActive: true,
+  } as never);
+
+  assert.ok(calls.includes('update-bounds'));
+  assert.ok(calls.includes('sync-layer'));
+  assert.ok(calls.includes('mouse-ignore:true:forward'));
+  assert.ok(calls.includes('ensure-level'));
+  assert.ok(calls.includes('enforce-order'));
+  assert.ok(calls.includes('sync-shortcuts'));
+  assert.ok(!calls.includes('always-on-top:false'));
+  assert.ok(!calls.includes('hide'));
+});
+
 test('macOS keeps tracked overlay visible while overlay interaction is active after mpv loses foreground', () => {
   const { window, calls, setFocused } = createMainWindowRecorder();
   const tracker: WindowTrackerStub = {

src/core/services/overlay-visibility.ts

@@ -71,6 +71,7 @@ export function updateVisibleOverlayVisibility(args: {
   lastKnownWindowsForegroundProcessName?: string | null;
   windowsOverlayProcessName?: string | null;
   windowsFocusHandoffGraceActive?: boolean;
+  macOSForegroundProbeActive?: boolean;
   trackerNotReadyWarningShown: boolean;
   setTrackerNotReadyWarningShown: (shown: boolean) => void;
   updateVisibleOverlayBounds: (geometry: WindowGeometry) => void;
@@ -128,6 +129,12 @@ export function updateVisibleOverlayVisibility(args: {
     const isTrackedMacOSTargetMinimized =
       canReportMacOSTargetMinimized && windowTracker?.isTargetWindowMinimized() === true;
     const trackedMacOSTargetFocused = args.windowTracker?.isTargetWindowFocused?.();
+    const shouldPreserveMacOSOverlayDuringForegroundProbe =
+      args.isMacOSPlatform &&
+      args.macOSForegroundProbeActive === true &&
+      !!windowTracker &&
+      !isTrackedMacOSTargetMinimized &&
+      (windowTracker.isTracking() || windowTracker.getGeometry() !== null);
     const hasTransientMacOSTrackerLoss =
       args.isMacOSPlatform &&
       canReportMacOSTargetMinimized &&
@@ -137,7 +144,10 @@ export function updateVisibleOverlayVisibility(args: {
       trackedMacOSTargetFocused !== false &&
       mainWindow.isVisible();
     const isTrackedMacOSTargetFocused =
-      hasTransientMacOSTrackerLoss || !args.isMacOSPlatform || !args.windowTracker
+      hasTransientMacOSTrackerLoss ||
+      shouldPreserveMacOSOverlayDuringForegroundProbe ||
+      !args.isMacOSPlatform ||
+      !args.windowTracker
         ? true
         : (trackedMacOSTargetFocused ?? true);
     const shouldReleaseMacOSOverlayLevel =

src/main.ts

@@ -2280,6 +2280,7 @@ const overlayVisibilityRuntime = createOverlayVisibilityRuntimeService(
     getLastKnownWindowsForegroundProcessName: () => lastWindowsVisibleOverlayForegroundProcessName,
     getWindowsOverlayProcessName: () => path.parse(process.execPath).name.toLowerCase(),
     getWindowsFocusHandoffGraceActive: () => hasWindowsVisibleOverlayFocusHandoffGrace(),
+    getMacOSForegroundProbeActive: () => macOSVisibleOverlayForegroundProbeActive,
     getTrackerNotReadyWarningShown: () => appState.trackerNotReadyWarningShown,
     setTrackerNotReadyWarningShown: (shown: boolean) => {
       appState.trackerNotReadyWarningShown = shown;
@@ -2323,6 +2324,7 @@ const VISIBLE_OVERLAY_BLUR_REFRESH_DELAYS_MS = [0, 25, 100, 250] as const;
 const WINDOWS_VISIBLE_OVERLAY_Z_ORDER_RETRY_DELAYS_MS = [0, 48, 120, 240, 480] as const;
 const WINDOWS_VISIBLE_OVERLAY_FOREGROUND_POLL_INTERVAL_MS = 75;
 const WINDOWS_VISIBLE_OVERLAY_FOCUS_HANDOFF_GRACE_MS = 200;
+const MACOS_VISIBLE_OVERLAY_FOREGROUND_PROBE_TIMEOUT_MS = 1_200;
 let visibleOverlayBlurRefreshTimeouts: Array<ReturnType<typeof setTimeout>> = [];
 let windowsVisibleOverlayZOrderRetryTimeouts: Array<ReturnType<typeof setTimeout>> = [];
 let windowsVisibleOverlayZOrderSyncInFlight = false;
@@ -2331,6 +2333,9 @@ let windowsVisibleOverlayForegroundPollInterval: ReturnType<typeof setInterval>
 let lastWindowsVisibleOverlayForegroundProcessName: string | null = null;
 let lastWindowsVisibleOverlayBlurredAtMs = 0;
 let visibleOverlayInteractionActive = false;
+let macOSVisibleOverlayForegroundProbeActive = false;
+let macOSVisibleOverlayForegroundProbeToken = 0;
+let macOSVisibleOverlayForegroundProbeTimeout: ReturnType<typeof setTimeout> | null = null;
 
 const handleStatsOverlayVisibilityChanged = createStatsOverlayVisibilityChangeHandler({
   setStatsOverlayVisibleState: (visible) => {
@@ -2357,6 +2362,49 @@ function clearWindowsVisibleOverlayZOrderRetryTimeouts(): void {
   windowsVisibleOverlayZOrderRetryTimeouts = [];
 }
 
+function finishMacOSVisibleOverlayForegroundProbe(token: number): void {
+  if (token !== macOSVisibleOverlayForegroundProbeToken) {
+    return;
+  }
+  if (macOSVisibleOverlayForegroundProbeTimeout !== null) {
+    clearTimeout(macOSVisibleOverlayForegroundProbeTimeout);
+    macOSVisibleOverlayForegroundProbeTimeout = null;
+  }
+  if (!macOSVisibleOverlayForegroundProbeActive) {
+    return;
+  }
+  macOSVisibleOverlayForegroundProbeActive = false;
+  overlayVisibilityRuntime.updateVisibleOverlayVisibility();
+}
+
+function startMacOSVisibleOverlayForegroundProbe(): void {
+  if (process.platform !== 'darwin') {
+    return;
+  }
+  const tracker = appState.windowTracker;
+  if (!tracker) {
+    return;
+  }
+
+  macOSVisibleOverlayForegroundProbeActive = true;
+  const token = ++macOSVisibleOverlayForegroundProbeToken;
+  if (macOSVisibleOverlayForegroundProbeTimeout !== null) {
+    clearTimeout(macOSVisibleOverlayForegroundProbeTimeout);
+  }
+  macOSVisibleOverlayForegroundProbeTimeout = setTimeout(() => {
+    finishMacOSVisibleOverlayForegroundProbe(token);
+  }, MACOS_VISIBLE_OVERLAY_FOREGROUND_PROBE_TIMEOUT_MS);
+
+  void tracker
+    .refreshNow()
+    .catch((error) => {
+      logger.warn('Failed to refresh macOS frontmost app after overlay blur', error);
+    })
+    .finally(() => {
+      finishMacOSVisibleOverlayForegroundProbe(token);
+    });
+}
+
 function getWindowsNativeWindowHandle(window: BrowserWindow): string {
   const handle = window.getNativeWindowHandle();
   return handle.length >= 8
@@ -2555,6 +2603,7 @@ function scheduleVisibleOverlayBlurRefresh(): void {
   if (process.platform === 'win32') {
     lastWindowsVisibleOverlayBlurredAtMs = Date.now();
   }
+  startMacOSVisibleOverlayForegroundProbe();
   clearVisibleOverlayBlurRefreshTimeouts();
   for (const delayMs of VISIBLE_OVERLAY_BLUR_REFRESH_DELAYS_MS) {
     const refreshTimeout = setTimeout(() => {

src/main/overlay-visibility-runtime.ts

@@ -17,6 +17,7 @@ export interface OverlayVisibilityRuntimeDeps {
   getLastKnownWindowsForegroundProcessName?: () => string | null;
   getWindowsOverlayProcessName?: () => string | null;
   getWindowsFocusHandoffGraceActive?: () => boolean;
+  getMacOSForegroundProbeActive?: () => boolean;
   getTrackerNotReadyWarningShown: () => boolean;
   setTrackerNotReadyWarningShown: (shown: boolean) => void;
   updateVisibleOverlayBounds: (geometry: WindowGeometry) => void;
@@ -59,6 +60,7 @@ export function createOverlayVisibilityRuntimeService(
         lastKnownWindowsForegroundProcessName: deps.getLastKnownWindowsForegroundProcessName?.(),
         windowsOverlayProcessName: deps.getWindowsOverlayProcessName?.() ?? null,
         windowsFocusHandoffGraceActive: deps.getWindowsFocusHandoffGraceActive?.() ?? false,
+        macOSForegroundProbeActive: deps.getMacOSForegroundProbeActive?.() ?? false,
         trackerNotReadyWarningShown: deps.getTrackerNotReadyWarningShown(),
         setTrackerNotReadyWarningShown: (shown: boolean) => {
           deps.setTrackerNotReadyWarningShown(shown);

src/main/runtime/overlay-visibility-runtime-main-deps.test.ts

@@ -21,6 +21,7 @@ test('overlay visibility runtime main deps builder maps state and geometry callb
     getLastKnownWindowsForegroundProcessName: () => 'mpv',
     getWindowsOverlayProcessName: () => 'subminer',
     getWindowsFocusHandoffGraceActive: () => true,
+    getMacOSForegroundProbeActive: () => true,
     getTrackerNotReadyWarningShown: () => trackerNotReadyWarningShown,
     setTrackerNotReadyWarningShown: (shown) => {
       trackerNotReadyWarningShown = shown;
@@ -47,6 +48,7 @@ test('overlay visibility runtime main deps builder maps state and geometry callb
   assert.equal(deps.getLastKnownWindowsForegroundProcessName?.(), 'mpv');
   assert.equal(deps.getWindowsOverlayProcessName?.(), 'subminer');
   assert.equal(deps.getWindowsFocusHandoffGraceActive?.(), true);
+  assert.equal(deps.getMacOSForegroundProbeActive?.(), true);
   assert.equal(deps.getTrackerNotReadyWarningShown(), false);
   deps.setTrackerNotReadyWarningShown(true);
   deps.updateVisibleOverlayBounds({ x: 0, y: 0, width: 10, height: 10 });

src/main/runtime/overlay-visibility-runtime-main-deps.ts

@@ -17,6 +17,7 @@ export function createBuildOverlayVisibilityRuntimeMainDepsHandler(
       deps.getLastKnownWindowsForegroundProcessName?.() ?? null,
     getWindowsOverlayProcessName: () => deps.getWindowsOverlayProcessName?.() ?? null,
     getWindowsFocusHandoffGraceActive: () => deps.getWindowsFocusHandoffGraceActive?.() ?? false,
+    getMacOSForegroundProbeActive: () => deps.getMacOSForegroundProbeActive?.() ?? false,
     getTrackerNotReadyWarningShown: () => deps.getTrackerNotReadyWarningShown(),
     setTrackerNotReadyWarningShown: (shown: boolean) => deps.setTrackerNotReadyWarningShown(shown),
     updateVisibleOverlayBounds: (geometry: WindowGeometry) =>

src/renderer/modals/subtitle-sidebar.test.ts

@@ -8,6 +8,7 @@ import {
   createSubtitleSidebarModal,
   findActiveSubtitleCueIndex,
 } from './subtitle-sidebar.js';
+import { YOMITAN_POPUP_HIDDEN_EVENT, YOMITAN_POPUP_SHOWN_EVENT } from '../yomitan-popup.js';
 
 function createClassList(initialTokens: string[] = []) {
   const tokens = new Set(initialTokens);
@@ -1542,6 +1543,137 @@ test('subtitle sidebar hover pause ignores playback-state IPC failures', async (
   }
 });
 
+test('subtitle sidebar keeps hover pause while a Yomitan lookup popup remains open', async () => {
+  const globals = globalThis as typeof globalThis & { window?: unknown; document?: unknown };
+  const previousWindow = globals.window;
+  const previousDocument = globals.document;
+  const mpvCommands: Array<Array<string | number>> = [];
+  const contentListeners = new Map<string, Array<() => Promise<void> | void>>();
+  const windowListeners = new Map<string, Array<() => Promise<void> | void>>();
+
+  const snapshot: SubtitleSidebarSnapshot = {
+    cues: [{ startTime: 1, endTime: 2, text: 'first' }],
+    currentSubtitle: {
+      text: 'first',
+      startTime: 1,
+      endTime: 2,
+    },
+    currentTimeSec: 1.1,
+    config: {
+      enabled: true,
+      autoOpen: false,
+      layout: 'overlay',
+      toggleKey: 'Backslash',
+      pauseVideoOnHover: true,
+      autoScroll: true,
+      maxWidth: 420,
+      opacity: 0.92,
+      backgroundColor: 'rgba(54, 58, 79, 0.88)',
+      textColor: '#cad3f5',
+      fontFamily: '"Iosevka Aile", sans-serif',
+      fontSize: 17,
+      timestampColor: '#a5adcb',
+      activeLineColor: '#f5bde6',
+      activeLineBackgroundColor: 'rgba(138, 173, 244, 0.22)',
+      hoverLineBackgroundColor: 'rgba(54, 58, 79, 0.84)',
+    },
+  };
+
+  Object.defineProperty(globalThis, 'window', {
+    configurable: true,
+    value: {
+      addEventListener: (type: string, listener: () => Promise<void> | void) => {
+        const bucket = windowListeners.get(type) ?? [];
+        bucket.push(listener);
+        windowListeners.set(type, bucket);
+      },
+      removeEventListener: () => {},
+      electronAPI: {
+        getSubtitleSidebarSnapshot: async () => snapshot,
+        getPlaybackPaused: async () => false,
+        sendMpvCommand: (command: Array<string | number>) => {
+          mpvCommands.push(command);
+        },
+      } as unknown as ElectronAPI,
+    },
+  });
+  Object.defineProperty(globalThis, 'document', {
+    configurable: true,
+    value: {
+      createElement: () => createCueRow(),
+      body: {
+        classList: createClassList(),
+      },
+      documentElement: {
+        style: {
+          setProperty: () => {},
+        },
+      },
+    },
+  });
+
+  try {
+    const state = createRendererState();
+    state.autoPauseVideoOnYomitanPopup = true;
+    const ctx = {
+      dom: {
+        overlay: { classList: createClassList() },
+        subtitleSidebarModal: {
+          classList: createClassList(['hidden']),
+          setAttribute: () => {},
+          style: { setProperty: () => {} },
+          addEventListener: () => {},
+        },
+        subtitleSidebarContent: {
+          classList: createClassList(),
+          getBoundingClientRect: () => ({ width: 420 }),
+          addEventListener: (type: string, listener: () => Promise<void> | void) => {
+            const bucket = contentListeners.get(type) ?? [];
+            bucket.push(listener);
+            contentListeners.set(type, bucket);
+          },
+        },
+        subtitleSidebarClose: { addEventListener: () => {} },
+        subtitleSidebarStatus: { textContent: '' },
+        subtitleSidebarList: createListStub(),
+      },
+      state,
+    };
+
+    const modal = createSubtitleSidebarModal(ctx as never, {
+      modalStateReader: { isAnyModalOpen: () => false },
+    });
+    modal.wireDomEvents();
+
+    await modal.openSubtitleSidebarModal();
+    mpvCommands.length = 0;
+    await contentListeners.get('mouseenter')?.[0]?.();
+
+    assert.deepEqual(mpvCommands, [['set_property', 'pause', 'yes']]);
+
+    for (const listener of windowListeners.get(YOMITAN_POPUP_SHOWN_EVENT) ?? []) {
+      await listener();
+    }
+    await contentListeners.get('mouseleave')?.[0]?.();
+
+    assert.deepEqual(mpvCommands, [['set_property', 'pause', 'yes']]);
+    assert.equal(state.subtitleSidebarPausedByHover, true);
+
+    for (const listener of windowListeners.get(YOMITAN_POPUP_HIDDEN_EVENT) ?? []) {
+      await listener();
+    }
+
+    assert.deepEqual(mpvCommands, [
+      ['set_property', 'pause', 'yes'],
+      ['set_property', 'pause', 'no'],
+    ]);
+    assert.equal(state.subtitleSidebarPausedByHover, false);
+  } finally {
+    Object.defineProperty(globalThis, 'window', { configurable: true, value: previousWindow });
+    Object.defineProperty(globalThis, 'document', { configurable: true, value: previousDocument });
+  }
+});
+
 test('subtitle sidebar embedded layout reserves and releases mpv right margin', async () => {
   const globals = globalThis as typeof globalThis & { window?: unknown; document?: unknown };
   const previousWindow = globals.window;

src/renderer/modals/subtitle-sidebar.ts

@@ -1,6 +1,11 @@
 import type { SubtitleCue, SubtitleData, SubtitleSidebarSnapshot } from '../../types';
 import type { ModalStateReader, RendererContext } from '../context';
 import { syncOverlayMouseIgnoreState } from '../overlay-mouse-ignore.js';
+import {
+  YOMITAN_POPUP_HIDDEN_EVENT,
+  YOMITAN_POPUP_SHOWN_EVENT,
+  isYomitanPopupVisible,
+} from '../yomitan-popup.js';
 
 const MANUAL_SCROLL_HOLD_MS = 1500;
 const ACTIVE_CUE_LOOKAHEAD_SEC = 0.18;
@@ -194,6 +199,8 @@ export function createSubtitleSidebarModal(
   let disposeDomEvents: (() => void) | null = null;
   let subtitleSidebarHovered = false;
   let subtitleSidebarFocusedWithin = false;
+  let subtitleSidebarYomitanPopupVisible = false;
+  let subtitleSidebarPauseHeldByYomitanPopup = false;
 
   function restoreEmbeddedSidebarPassthrough(): void {
     syncOverlayMouseIgnoreState(ctx);
@@ -323,18 +330,65 @@ export function createSubtitleSidebarModal(
     return `Jump to subtitle at ${formatCueTimestamp(cue.startTime)}`;
   }
 
+  function isYomitanPopupVisibleForSidebar(): boolean {
+    if (subtitleSidebarYomitanPopupVisible || ctx.state.yomitanPopupVisible) {
+      return true;
+    }
+    if (typeof document === 'undefined') {
+      return false;
+    }
+    return isYomitanPopupVisible(document);
+  }
+
+  function shouldHoldSidebarPauseForYomitanPopup(): boolean {
+    return (
+      ctx.state.autoPauseVideoOnYomitanPopup &&
+      ctx.state.subtitleSidebarPausedByHover &&
+      isYomitanPopupVisibleForSidebar()
+    );
+  }
+
   function resumeSubtitleSidebarHoverPause(): void {
     subtitleSidebarHoverRequestId += 1;
     if (!ctx.state.subtitleSidebarPausedByHover) {
+      subtitleSidebarPauseHeldByYomitanPopup = false;
       restoreEmbeddedSidebarPassthrough();
       return;
     }
 
+    if (shouldHoldSidebarPauseForYomitanPopup()) {
+      subtitleSidebarPauseHeldByYomitanPopup = true;
+      restoreEmbeddedSidebarPassthrough();
+      return;
+    }
+
+    subtitleSidebarPauseHeldByYomitanPopup = false;
     ctx.state.subtitleSidebarPausedByHover = false;
     window.electronAPI.sendMpvCommand(['set_property', 'pause', 'no']);
     restoreEmbeddedSidebarPassthrough();
   }
 
+  function handleYomitanPopupShown(): void {
+    subtitleSidebarYomitanPopupVisible = true;
+    if (ctx.state.autoPauseVideoOnYomitanPopup && ctx.state.subtitleSidebarPausedByHover) {
+      subtitleSidebarPauseHeldByYomitanPopup = true;
+    }
+  }
+
+  function handleYomitanPopupHidden(): void {
+    subtitleSidebarYomitanPopupVisible = false;
+    if (!subtitleSidebarPauseHeldByYomitanPopup) {
+      return;
+    }
+
+    subtitleSidebarPauseHeldByYomitanPopup = false;
+    if (ctx.state.isOverSubtitleSidebar) {
+      restoreEmbeddedSidebarPassthrough();
+      return;
+    }
+    resumeSubtitleSidebarHoverPause();
+  }
+
   function maybeAutoScrollActiveCue(
     previousActiveCueIndex: number,
     behavior: ScrollBehavior = 'smooth',
@@ -660,8 +714,12 @@ export function createSubtitleSidebarModal(
       syncEmbeddedSidebarLayout();
     };
     window.addEventListener('resize', resizeHandler);
+    window.addEventListener(YOMITAN_POPUP_SHOWN_EVENT, handleYomitanPopupShown);
+    window.addEventListener(YOMITAN_POPUP_HIDDEN_EVENT, handleYomitanPopupHidden);
     disposeDomEvents = () => {
       window.removeEventListener('resize', resizeHandler);
+      window.removeEventListener(YOMITAN_POPUP_SHOWN_EVENT, handleYomitanPopupShown);
+      window.removeEventListener(YOMITAN_POPUP_HIDDEN_EVENT, handleYomitanPopupHidden);
       disposeDomEvents = null;
     };
   }

src/window-trackers/base-tracker.ts

@@ -50,6 +50,10 @@ export abstract class BaseWindowTracker {
   abstract start(): void;
   abstract stop(): void;
 
+  refreshNow(): Promise<void> {
+    return Promise.resolve();
+  }
+
   getGeometry(): WindowGeometry | null {
     return this.currentGeometry;
   }

src/window-trackers/macos-tracker.test.ts

@@ -359,6 +359,35 @@ test('MacOSWindowTracker marks target unfocused on explicit inactive helper sign
   assert.deepEqual(focusChanges, [true, false]);
 });
 
+test('MacOSWindowTracker refreshNow immediately samples frontmost mpv state', async () => {
+  let callIndex = 0;
+  const outputs = [
+    { stdout: '10,20,1280,720,0', stderr: '' },
+    { stdout: 'active', stderr: '' },
+  ];
+
+  const tracker = new MacOSWindowTracker('/tmp/mpv.sock', {
+    resolveHelper: () => ({
+      helperPath: 'helper.swift',
+      helperType: 'swift',
+    }),
+    runHelper: async () => outputs[callIndex++] ?? outputs.at(-1)!,
+  });
+
+  await (tracker as unknown as { refreshNow: () => Promise<void> }).refreshNow();
+  assert.equal(tracker.isTargetWindowFocused(), false);
+
+  await (tracker as unknown as { refreshNow: () => Promise<void> }).refreshNow();
+  assert.equal(tracker.isTracking(), true);
+  assert.equal(tracker.isTargetWindowFocused(), true);
+  assert.deepEqual(tracker.getGeometry(), {
+    x: 10,
+    y: 20,
+    width: 1280,
+    height: 720,
+  });
+});
+
 test('MacOSWindowTracker drops tracking after consecutive helper misses', async () => {
   let callIndex = 0;
   const outputs = [

src/window-trackers/macos-tracker.ts

@@ -196,7 +196,7 @@ export function parseMacOSHelperOutput(result: string): MacOSHelperWindowState |
 
 export class MacOSWindowTracker extends BaseWindowTracker {
   private pollTimeout: ReturnType<typeof setTimeout> | null = null;
-  private pollInFlight = false;
+  private pollInFlightPromise: Promise<void> | null = null;
   private started = false;
   private helperPath: string | null = null;
   private helperType: 'binary' | 'swift' | null = null;
@@ -357,7 +357,7 @@ export class MacOSWindowTracker extends BaseWindowTracker {
       return;
     }
     this.started = true;
-    this.pollGeometry();
+    void this.pollGeometry();
   }
 
   stop(): void {
@@ -365,6 +365,11 @@ export class MacOSWindowTracker extends BaseWindowTracker {
     this.clearScheduledPoll();
   }
 
+  override refreshNow(): Promise<void> {
+    this.clearScheduledPoll();
+    return this.pollGeometry();
+  }
+
   override isTargetWindowMinimized(): boolean {
     return this.targetWindowMinimized;
   }
@@ -443,13 +448,19 @@ export class MacOSWindowTracker extends BaseWindowTracker {
     }, this.resolveNextPollIntervalMs());
   }
 
-  private pollGeometry(): void {
-    if (this.pollInFlight || !this.helperPath || !this.helperType) {
-      return;
+  private pollGeometry(): Promise<void> {
+    if (this.pollInFlightPromise) {
+      return this.pollInFlightPromise;
+    }
+    if (!this.helperPath || !this.helperType) {
+      return Promise.resolve();
     }
 
-    this.pollInFlight = true;
-    void this.runHelper(this.helperPath, this.helperType, this.targetMpvSocketPath)
+    this.pollInFlightPromise = this.runHelper(
+      this.helperPath,
+      this.helperType,
+      this.targetMpvSocketPath,
+    )
       .then(({ stdout }) => {
         const parsed = parseMacOSHelperOutput(stdout || '');
         if (parsed) {
@@ -495,8 +506,9 @@ export class MacOSWindowTracker extends BaseWindowTracker {
         this.registerTrackingMiss();
       })
       .finally(() => {
-        this.pollInFlight = false;
+        this.pollInFlightPromise = null;
         this.scheduleNextPoll();
       });
+    return this.pollInFlightPromise;
   }
 }