diff --git a/ui/src/components/input-dialog.test.ts b/ui/src/components/input-dialog.test.ts
new file mode 100644
index 000000000000..4841273d1206
--- /dev/null
+++ b/ui/src/components/input-dialog.test.ts
@@ -0,0 +1,84 @@
+/* @vitest-environment jsdom */
+
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { getRenderedModalDialog, installDialogPolyfill } from "../test-helpers/modal-dialog.ts";
+import { showInputDialog } from "./input-dialog.ts";
+
+let restoreDialogPolyfill: () => void;
+
+function findButton(label: string): HTMLButtonElement {
+  const button = [...document.body.querySelectorAll("button")].find(
+    (candidate) => candidate.textContent?.trim() === label,
+  );
+  if (!(button instanceof HTMLButtonElement)) {
+    throw new Error(`Expected ${label} button`);
+  }
+  return button;
+}
+
+describe("showInputDialog", () => {
+  beforeEach(() => {
+    restoreDialogPolyfill = installDialogPolyfill();
+  });
+
+  afterEach(() => {
+    document.body.replaceChildren();
+    restoreDialogPolyfill();
+  });
+
+  it("renders accessible copy and resolves the submitted value", async () => {
+    const result = showInputDialog({
+      title: "Rename session",
+      label: "Session name",
+      defaultValue: "Original name",
+      submitLabel: "Rename",
+    });
+    const { modal, dialog } = await getRenderedModalDialog(document.body);
+    const input = modal.querySelector<HTMLInputElement>('input[name="value"]');
+
+    expect(dialog.getAttribute("aria-label")).toBe("Rename session");
+    expect(dialog.getAttribute("aria-description")).toBe("Session name");
+    expect(input?.value).toBe("Original name");
+
+    if (!input) {
+      throw new Error("Expected text input");
+    }
+    input.value = "Renamed session";
+    findButton("Rename").click();
+
+    await expect(result).resolves.toBe("Renamed session");
+    expect(document.body.querySelector("openclaw-modal-dialog")).toBeNull();
+  });
+
+  it("treats modal dismissal as cancellation", async () => {
+    const result = showInputDialog({ title: "Rename session" });
+    const { modal } = await getRenderedModalDialog(document.body);
+
+    modal.dispatchEvent(new CustomEvent("modal-cancel"));
+
+    await expect(result).resolves.toBeNull();
+  });
+
+  it("removes the dialog and cancels when its owner aborts", async () => {
+    const controller = new AbortController();
+    const result = showInputDialog({ title: "Rename session", signal: controller.signal });
+    await getRenderedModalDialog(document.body);
+
+    controller.abort();
+
+    await expect(result).resolves.toBeNull();
+    expect(document.body.querySelector("openclaw-modal-dialog")).toBeNull();
+  });
+
+  it("rejects a reentrant input request instead of stacking or replaying it", async () => {
+    const first = showInputDialog({ title: "First" });
+    const second = showInputDialog({ title: "Second" });
+    await getRenderedModalDialog(document.body);
+
+    expect(document.body.textContent).toContain("First");
+    expect(document.body.textContent).not.toContain("Second");
+    await expect(second).resolves.toBeNull();
+    findButton("Cancel").click();
+    await expect(first).resolves.toBeNull();
+  });
+});
diff --git a/ui/src/components/input-dialog.ts b/ui/src/components/input-dialog.ts
new file mode 100644
index 000000000000..6500b242eaf4
--- /dev/null
+++ b/ui/src/components/input-dialog.ts
@@ -0,0 +1,95 @@
+// Control UI helper presents Promise-based text input without relying on a native prompt bridge.
+import { html, nothing, render } from "lit";
+import { t } from "../i18n/index.ts";
+import "./modal-dialog.ts";
+
+type InputDialogOptions = {
+  title: string;
+  label?: string;
+  defaultValue?: string;
+  submitLabel?: string;
+  cancelLabel?: string;
+  signal?: AbortSignal;
+};
+
+let inputActive = false;
+
+function presentInputDialog(options: InputDialogOptions): Promise<string | null> {
+  if (options.signal?.aborted) {
+    return Promise.resolve(null);
+  }
+  const host = document.createElement("div");
+  document.body.append(host);
+  return new Promise((resolve) => {
+    let settled = false;
+    const finish = (value: string | null) => {
+      if (settled) {
+        return;
+      }
+      settled = true;
+      options.signal?.removeEventListener("abort", handleAbort);
+      render(nothing, host);
+      host.remove();
+      resolve(value);
+    };
+    const handleAbort = () => finish(null);
+    const submit = (event: SubmitEvent) => {
+      event.preventDefault();
+      const form = event.currentTarget;
+      if (!(form instanceof HTMLFormElement)) {
+        return;
+      }
+      const input = form.elements.namedItem("value");
+      if (input instanceof HTMLInputElement) {
+        finish(input.value);
+      }
+    };
+    options.signal?.addEventListener("abort", handleAbort, { once: true });
+    const label = options.label ?? options.title;
+    render(
+      html`
+        <openclaw-modal-dialog
+          label=${options.title}
+          description=${label}
+          @modal-cancel=${() => finish(null)}
+        >
+          <form class="exec-approval-card" @submit=${submit}>
+            <div class="exec-approval-header">
+              <div class="exec-approval-title">${options.title}</div>
+            </div>
+            <label class="field">
+              <span>${label}</span>
+              <input
+                name="value"
+                type="text"
+                autocomplete="off"
+                .value=${options.defaultValue ?? ""}
+                autofocus
+              />
+            </label>
+            <div class="exec-approval-actions">
+              <button type="submit" class="btn primary">
+                ${options.submitLabel ?? t("common.save")}
+              </button>
+              <button type="button" class="btn" @click=${() => finish(null)}>
+                ${options.cancelLabel ?? t("common.cancel")}
+              </button>
+            </div>
+          </form>
+        </openclaw-modal-dialog>
+      `,
+      host,
+    );
+  });
+}
+
+/** Native prompts block reentrancy; reject a second request instead of stacking it. */
+export function showInputDialog(options: InputDialogOptions): Promise<string | null> {
+  if (inputActive) {
+    return Promise.resolve(null);
+  }
+  inputActive = true;
+  return presentInputDialog(options).finally(() => {
+    inputActive = false;
+  });
+}
diff --git a/ui/src/components/session-organizer-controller.ts b/ui/src/components/session-organizer-controller.ts
index e69a2e947e10..724027302da4 100644
--- a/ui/src/components/session-organizer-controller.ts
+++ b/ui/src/components/session-organizer-controller.ts
@@ -392,7 +392,11 @@ export class SessionOrganizerController implements ReactiveController {
   }
 
   async renameSession(session: SidebarRecentSession): Promise<void> {
-    const nextLabel = window.prompt(t("sessionsView.renameSessionPrompt"), session.label);
+    const { showInputDialog } = await import("./input-dialog.ts");
+    const nextLabel = await showInputDialog({
+      title: t("sessionsView.renameSessionPrompt"),
+      defaultValue: session.label,
+    });
     if (nextLabel === null) {
       return;
     }
diff --git a/ui/src/e2e/session-management.groups.e2e.test.ts b/ui/src/e2e/session-management.groups.e2e.test.ts
index 71e9f1ad3b02..055777810ca2 100644
--- a/ui/src/e2e/session-management.groups.e2e.test.ts
+++ b/ui/src/e2e/session-management.groups.e2e.test.ts
@@ -1,8 +1,10 @@
+import path from "node:path";
 import { expect, it } from "vitest";
 import {
   actionOpacity,
   activateMenuItem,
   captureUiProof,
+  captureUiProofEnabled,
   collapsedSessionSectionsStorageKey,
   controlUiSessionPath,
   createSessionManagementE2eSuite,
@@ -10,6 +12,7 @@ import {
   requireRecord,
   sessionRow,
   sessionsListResponse,
+  uiProofArtifactDir,
   waitForPatch,
 } from "./session-management.test-support.ts";
 
@@ -77,8 +80,10 @@ suite.define(() => {
       await row.waitFor({ state: "visible", timeout: 10_000 });
       await row.hover();
       await row.getByRole("button", { name: "Open session menu" }).click();
-      page.once("dialog", (dialog) => void dialog.accept("Rejected rename"));
       await page.getByRole("menuitem", { name: "Rename…" }).click();
+      const dialog = page.locator('openclaw-modal-dialog[label="Rename session"]');
+      await dialog.getByRole("textbox", { name: "Rename session" }).fill("Rejected rename");
+      await dialog.getByRole("button", { name: "Save" }).click();
       await gateway.waitForRequest("sessions.patch");
       await gateway.rejectDeferred("sessions.patch", {
         code: "INVALID_REQUEST",
@@ -101,6 +106,62 @@ suite.define(() => {
     }
   });
 
+  it("renames a sidebar session through an in-app dialog", async () => {
+    const context = await suite.browser.newContext({
+      locale: "en-US",
+      serviceWorkers: "block",
+      viewport: { height: 900, width: 1280 },
+      recordVideo: captureUiProofEnabled
+        ? { dir: uiProofArtifactDir, size: { height: 900, width: 1280 } }
+        : undefined,
+    });
+    const page = await context.newPage();
+    const proofVideo = page.video();
+    const gateway = await installMockGateway(page, {
+      methodResponses: {
+        "sessions.list": sessionsListResponse([
+          sessionRow("agent:main:rename-me", "Original name", Date.now()),
+        ]),
+        "sessions.patch": {},
+      },
+      sessionKey: "agent:main:rename-me",
+    });
+
+    try {
+      await page.goto(`${suite.server.baseUrl}chat`);
+      const row = page.locator('[data-session-key="agent:main:rename-me"]');
+      await row.waitFor({ state: "visible", timeout: 10_000 });
+      await row.hover();
+      await row.getByRole("button", { name: "Open session menu" }).click();
+      await page.getByRole("menuitem", { name: "Rename…" }).click();
+
+      await page.getByRole("dialog", { name: "Rename session" }).waitFor({ state: "visible" });
+      const dialog = page.locator('openclaw-modal-dialog[label="Rename session"]');
+      const name = dialog.getByRole("textbox", { name: "Rename session" });
+      await name.waitFor({ state: "visible" });
+      await expect.poll(() => name.inputValue()).toBe("Original name");
+      await captureUiProof(page, "sidebar-session-rename-dialog.png");
+      await name.fill("Renamed session");
+      await dialog.getByRole("button", { name: "Save" }).click();
+
+      const patch = await waitForPatch(
+        gateway,
+        (params) => params.key === "agent:main:rename-me" && params.label === "Renamed session",
+      );
+      expect(patch.params).toMatchObject({
+        key: "agent:main:rename-me",
+        label: "Renamed session",
+      });
+      await expect.poll(() => row.textContent()).toContain("Renamed session");
+      await captureUiProof(page, "sidebar-session-renamed.png");
+    } finally {
+      await context.close();
+      if (proofVideo) {
+        await proofVideo.saveAs(path.join(uiProofArtifactDir, "sidebar-session-rename.webm"));
+      }
+    }
+  });
+
   it("manages sessions through the sidebar groups and command palette", async () => {
     const baseTime = Date.parse("2026-07-01T16:00:00.000Z");
     const context = await suite.browser.newContext({
diff --git a/ui/src/pages/sessions/sessions-page.ts b/ui/src/pages/sessions/sessions-page.ts
index 171ba5ff1138..90faf25439c7 100644
--- a/ui/src/pages/sessions/sessions-page.ts
+++ b/ui/src/pages/sessions/sessions-page.ts
@@ -18,6 +18,7 @@ import {
   resolveCloudWorkerStopAction,
 } from "../../components/cloud-worker-stop.ts";
 import { showConfirmDialog } from "../../components/confirm-dialog.ts";
+import { showInputDialog } from "../../components/input-dialog.ts";
 import { fetchSessionMenuWork } from "../../components/session-menu-work.ts";
 import type {
   SessionMenuAction,
@@ -1078,11 +1079,11 @@ class SessionsPage extends OpenClawLightDomElement {
     }
   }
 
-  private renameSession(row: GatewaySessionRow) {
-    const value = window.prompt(
-      t("sessionsView.renameSessionPrompt"),
-      normalizeOptionalString(row.label) ?? "",
-    );
+  private async renameSession(row: GatewaySessionRow) {
+    const value = await showInputDialog({
+      title: t("sessionsView.renameSessionPrompt"),
+      defaultValue: normalizeOptionalString(row.label) ?? "",
+    });
     if (value === null) {
       return;
     }
@@ -1472,7 +1473,7 @@ class SessionsPage extends OpenClawLightDomElement {
               void this.patchSession(row.key, { unread: row.unread !== true });
               break;
             case "rename":
-              this.renameSession(row);
+              void this.renameSession(row);
               break;
             case "fork":
               void this.forkSession(row.key);
diff --git a/ui/src/test-helpers/app-sidebar-cases/sessions.ts b/ui/src/test-helpers/app-sidebar-cases/sessions.ts
index 361ea35c5ba1..d916bf728cf1 100644
--- a/ui/src/test-helpers/app-sidebar-cases/sessions.ts
+++ b/ui/src/test-helpers/app-sidebar-cases/sessions.ts
@@ -573,26 +573,26 @@ describe("AppSidebar session mutation feedback", () => {
   it("shows and dismisses a fixed sidebar error when a session patch is rejected", async () => {
     const { harness, sidebar } = await mountMutationHarness();
     harness.patch.mockRejectedValueOnce(new Error("rename rejected by Gateway"));
-    const promptSpy = vi.spyOn(window, "prompt").mockReturnValue("Rejected rename");
-    try {
-      const menu = await openSessionMenu(sidebar, "agent:main:a");
-      menu.querySelector<HTMLButtonElement>('[data-shortcut="r"]')?.click();
+    const menu = await openSessionMenu(sidebar, "agent:main:a");
+    menu.querySelector<HTMLButtonElement>('[data-shortcut="r"]')?.click();
+    await waitForFast(() => {
+      expect(document.body.querySelector('input[name="value"]')).toBeInstanceOf(HTMLInputElement);
+    });
+    document.body.querySelector<HTMLInputElement>('input[name="value"]')!.value = "Rejected rename";
+    document.body.querySelector<HTMLButtonElement>('button[type="submit"]')?.click();
 
-      await waitForFast(() => {
-        expect(sidebar.querySelector("[data-sidebar-session-error]")?.textContent).toContain(
-          "rename rejected by Gateway",
-        );
-      });
-      const error = sidebar.querySelector("[data-sidebar-session-error]");
-      expect(error?.parentElement?.classList.contains("sidebar-sessions")).toBe(true);
-      expect(error?.closest(".sidebar-recent-sessions")).toBeNull();
+    await waitForFast(() => {
+      expect(sidebar.querySelector("[data-sidebar-session-error]")?.textContent).toContain(
+        "rename rejected by Gateway",
+      );
+    });
+    const error = sidebar.querySelector("[data-sidebar-session-error]");
+    expect(error?.parentElement?.classList.contains("sidebar-sessions")).toBe(true);
+    expect(error?.closest(".sidebar-recent-sessions")).toBeNull();
 
-      error?.querySelector<HTMLButtonElement>('[aria-label="Dismiss error"]')?.click();
-      await sidebar.updateComplete;
-      expect(sidebar.querySelector("[data-sidebar-session-error]")).toBeNull();
-    } finally {
-      promptSpy.mockRestore();
-    }
+    error?.querySelector<HTMLButtonElement>('[aria-label="Dismiss error"]')?.click();
+    await sidebar.updateComplete;
+    expect(sidebar.querySelector("[data-sidebar-session-error]")).toBeNull();
   });
 
   it("surfaces partial batch-delete errors", async () => {