diff --git a/packages/ui/src/primitives/toast.test.ts b/packages/ui/src/primitives/toast.test.ts
index 7f81820d58..48b439f9e7 100644
--- a/packages/ui/src/primitives/toast.test.ts
+++ b/packages/ui/src/primitives/toast.test.ts
@@ -1,4 +1,4 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 const quill = vi.hoisted(() => {
   let n = 0;
@@ -32,6 +32,7 @@ import { toast } from "./toast";
 
 beforeEach(() => {
   vi.clearAllMocks();
+  vi.useFakeTimers();
   quill._reset();
   settings.toastNotifications = true;
   // clearAllMocks resets the level fns to undefined returns; restore ids.
@@ -47,6 +48,12 @@ beforeEach(() => {
   }
 });
 
+afterEach(() => {
+  vi.clearAllTimers();
+  vi.useRealTimers();
+  vi.restoreAllMocks();
+});
+
 describe("toast wrapper", () => {
   it("creates without an id and forwards title/description/timeout", () => {
     toast.success("Saved", { description: "All good", duration: 1000 });
@@ -128,4 +135,55 @@ describe("toast wrapper", () => {
     expect(quill.success).toHaveBeenCalledTimes(2);
     expect(quill.update).not.toHaveBeenCalled();
   });
+
+  // base-ui pauses auto-dismiss while the window is unfocused, so on the desktop
+  // app a toast can hang until closed by hand. The wrapper backs it with a
+  // blur-only fallback.
+  describe("blur fallback", () => {
+    it("dismisses a duration toast once its time is up while the window is unfocused", () => {
+      vi.spyOn(document, "hasFocus").mockReturnValue(false);
+      toast.success("Task archived", { id: "archive-x", duration: 8000 });
+      expect(quill.dismiss).not.toHaveBeenCalled();
+      vi.advanceTimersByTime(8000);
+      expect(quill.dismiss).toHaveBeenCalledWith("q1");
+    });
+
+    it("falls back on the provider default when no duration is set", () => {
+      vi.spyOn(document, "hasFocus").mockReturnValue(false);
+      toast.success("Task deleted");
+      vi.advanceTimersByTime(4999);
+      expect(quill.dismiss).not.toHaveBeenCalled();
+      vi.advanceTimersByTime(1);
+      expect(quill.dismiss).toHaveBeenCalledWith("q1");
+    });
+
+    it("leaves base-ui's own timer in charge while the window is focused", () => {
+      vi.spyOn(document, "hasFocus").mockReturnValue(true);
+      toast.success("Task archived", { duration: 8000 });
+      vi.advanceTimersByTime(8000);
+      expect(quill.dismiss).not.toHaveBeenCalled();
+      // Simulate the toast closing so its pending blur listener is cleaned up.
+      quill.success.mock.calls[0]?.[0]?.onClose?.();
+    });
+
+    it("dismisses on a later blur when the window was focused at the deadline", () => {
+      const hasFocus = vi.spyOn(document, "hasFocus").mockReturnValue(true);
+      toast.success("Task archived", { id: "archive-y", duration: 8000 });
+      vi.advanceTimersByTime(8000);
+      expect(quill.dismiss).not.toHaveBeenCalled();
+      // Window loses focus while the toast is still up — base-ui re-pauses, so
+      // the fallback must still clear it rather than having given up already.
+      hasFocus.mockReturnValue(false);
+      window.dispatchEvent(new Event("blur"));
+      expect(quill.dismiss).toHaveBeenCalledWith("q1");
+    });
+
+    it("never force-dismisses loading or never-expiring toasts", () => {
+      vi.spyOn(document, "hasFocus").mockReturnValue(false);
+      toast.loading("Working…");
+      toast.error("Offline", { duration: Number.POSITIVE_INFINITY });
+      vi.advanceTimersByTime(60_000);
+      expect(quill.dismiss).not.toHaveBeenCalled();
+    });
+  });
 });
diff --git a/packages/ui/src/primitives/toast.tsx b/packages/ui/src/primitives/toast.tsx
index e752a213ea..f949cd79bb 100644
--- a/packages/ui/src/primitives/toast.tsx
+++ b/packages/ui/src/primitives/toast.tsx
@@ -35,10 +35,58 @@ type Level = "success" | "error" | "info" | "warning" | "loading";
 // stacking; `dismiss(id)` resolves through here. Entries self-clean on close.
 const idRegistry = new Map<string, string>();
 
+// Mirrors quill's <ToastProvider> default; used to time the blur fallback for
+// toasts that don't set their own duration. Keep in sync with the provider in
+// App.tsx, which mounts <ToastProvider> without a timeout override.
+const PROVIDER_DEFAULT_TIMEOUT_MS = 5000;
+
 function normalize(detail?: Detail): ToastOptions {
   return typeof detail === "string" ? { description: detail } : (detail ?? {});
 }
 
+// base-ui pauses a toast's auto-dismiss timer whenever the app window isn't
+// OS-focused — not only while it's hovered. On the Electron app the window is
+// often not frontmost, so a toast can hang on screen until it's closed by hand.
+// Back base-ui's timer with one that still clears the toast once its time is up
+// while the window is unfocused; when the window is focused we leave base-ui's
+// own timer (and its hover-to-pause) in charge. Returns a cleanup to wire into
+// the toast's onClose so nothing is left pending once it goes away.
+function armBlurDismiss(
+  level: Level,
+  timeout: number | undefined,
+  quillId: string,
+): (() => void) | undefined {
+  if (level === "loading" || typeof document === "undefined") {
+    return undefined;
+  }
+  const dismissAfter =
+    typeof timeout === "number" ? timeout : PROVIDER_DEFAULT_TIMEOUT_MS;
+  // timeout 0 is the "never auto-dismiss" contract (e.g. the offline toast).
+  if (dismissAfter <= 0) {
+    return undefined;
+  }
+  let onBlur: (() => void) | undefined;
+  const timer = setTimeout(() => {
+    if (!document.hasFocus()) {
+      quillToast.dismiss(quillId);
+      return;
+    }
+    // Focused at the deadline (base-ui is holding it, e.g. hover-paused). Once
+    // it's no longer hovered while focused base-ui dismisses it — but if the
+    // window loses focus first, base-ui re-pauses and it would hang, so dismiss
+    // on the next blur instead of giving up after this single check.
+    onBlur = () => quillToast.dismiss(quillId);
+    window.addEventListener("blur", onBlur, { once: true });
+  }, dismissAfter);
+  return () => {
+    clearTimeout(timer);
+    if (onBlur) {
+      window.removeEventListener("blur", onBlur);
+      onBlur = undefined;
+    }
+  };
+}
+
 function emit(
   level: Level,
   title: string,
@@ -70,17 +118,26 @@ function emit(
       quillToast.update(existing, { type: level, ...fields });
       return stableId;
     }
+    let cleanupBlurDismiss: (() => void) | undefined;
     const quillId = quillToast[level]({
       ...fields,
       onClose: () => {
+        cleanupBlurDismiss?.();
         if (idRegistry.get(stableId) === quillId) idRegistry.delete(stableId);
       },
     });
     idRegistry.set(stableId, quillId);
+    cleanupBlurDismiss = armBlurDismiss(level, timeout, quillId);
     return stableId;
   }
 
-  return quillToast[level](fields);
+  let cleanupBlurDismiss: (() => void) | undefined;
+  const quillId = quillToast[level]({
+    ...fields,
+    onClose: () => cleanupBlurDismiss?.(),
+  });
+  cleanupBlurDismiss = armBlurDismiss(level, timeout, quillId);
+  return quillId;
 }
 
 export const toast = {