diff --git a/package.json b/package.json
index c1b68821083..92e04fb7def 100644
--- a/package.json
+++ b/package.json
@@ -87,12 +87,13 @@
     "ios:gen": "bash -lc './scripts/ios-configure-signing.sh && cd apps/ios && xcodegen generate'",
     "ios:open": "bash -lc './scripts/ios-configure-signing.sh && cd apps/ios && xcodegen generate && open OpenClaw.xcodeproj'",
     "ios:run": "bash -lc './scripts/ios-configure-signing.sh && cd apps/ios && xcodegen generate && xcodebuild -project OpenClaw.xcodeproj -scheme OpenClaw -destination \"${IOS_DEST:-platform=iOS Simulator,name=iPhone 17}\" -configuration Debug build && xcrun simctl boot \"${IOS_SIM:-iPhone 17}\" || true && xcrun simctl launch booted ai.openclaw.ios'",
-    "lint": "oxlint --type-aware",
+    "lint": "oxlint --type-aware && pnpm lint:ui:no-raw-window-open",
     "lint:all": "pnpm lint && pnpm lint:swift",
     "lint:docs": "pnpm dlx markdownlint-cli2",
     "lint:docs:fix": "pnpm dlx markdownlint-cli2 --fix",
     "lint:fix": "oxlint --type-aware --fix && pnpm format",
     "lint:swift": "swiftlint lint --config .swiftlint.yml && (cd apps/ios && swiftlint lint --config .swiftlint.yml)",
+    "lint:ui:no-raw-window-open": "node scripts/check-no-raw-window-open.mjs",
     "mac:open": "open dist/OpenClaw.app",
     "mac:package": "bash scripts/package-mac-app.sh",
     "mac:restart": "bash scripts/restart-mac.sh",
diff --git a/scripts/check-no-raw-window-open.mjs b/scripts/check-no-raw-window-open.mjs
new file mode 100644
index 00000000000..55334549ba1
--- /dev/null
+++ b/scripts/check-no-raw-window-open.mjs
@@ -0,0 +1,87 @@
+#!/usr/bin/env node
+
+import { promises as fs } from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const uiSourceDir = path.join(repoRoot, "ui", "src", "ui");
+const allowedCallsites = new Set([path.join(uiSourceDir, "open-external-url.ts")]);
+
+function isTestFile(filePath) {
+  return (
+    filePath.endsWith(".test.ts") ||
+    filePath.endsWith(".browser.test.ts") ||
+    filePath.endsWith(".node.test.ts")
+  );
+}
+
+async function collectTypeScriptFiles(dir) {
+  const entries = await fs.readdir(dir, { withFileTypes: true });
+  const out = [];
+  for (const entry of entries) {
+    const entryPath = path.join(dir, entry.name);
+    if (entry.isDirectory()) {
+      out.push(...(await collectTypeScriptFiles(entryPath)));
+      continue;
+    }
+    if (!entry.isFile()) {
+      continue;
+    }
+    if (!entryPath.endsWith(".ts")) {
+      continue;
+    }
+    if (isTestFile(entryPath)) {
+      continue;
+    }
+    out.push(entryPath);
+  }
+  return out;
+}
+
+function lineNumberAt(content, index) {
+  let lines = 1;
+  for (let i = 0; i < index; i++) {
+    if (content.charCodeAt(i) === 10) {
+      lines++;
+    }
+  }
+  return lines;
+}
+
+async function main() {
+  const files = await collectTypeScriptFiles(uiSourceDir);
+  const violations = [];
+  const rawWindowOpenRe = /\bwindow\s*\.\s*open\s*\(/g;
+
+  for (const filePath of files) {
+    if (allowedCallsites.has(filePath)) {
+      continue;
+    }
+
+    const content = await fs.readFile(filePath, "utf8");
+    let match = rawWindowOpenRe.exec(content);
+    while (match) {
+      const line = lineNumberAt(content, match.index);
+      const relPath = path.relative(repoRoot, filePath);
+      violations.push(`${relPath}:${line}`);
+      match = rawWindowOpenRe.exec(content);
+    }
+  }
+
+  if (violations.length === 0) {
+    return;
+  }
+
+  console.error("Found raw window.open usage outside safe helper:");
+  for (const violation of violations) {
+    console.error(`- ${violation}`);
+  }
+  console.error("Use openExternalUrlSafe(...) from ui/src/ui/open-external-url.ts instead.");
+  process.exit(1);
+}
+
+main().catch((error) => {
+  console.error(error);
+  process.exit(1);
+});
diff --git a/ui/src/ui/chat/grouped-render.ts b/ui/src/ui/chat/grouped-render.ts
index e8993f0c29d..df4689b0fa4 100644
--- a/ui/src/ui/chat/grouped-render.ts
+++ b/ui/src/ui/chat/grouped-render.ts
@@ -2,10 +2,10 @@ import { html, nothing } from "lit";
 import { unsafeHTML } from "lit/directives/unsafe-html.js";
 import type { AssistantIdentity } from "../assistant-identity.ts";
 import { toSanitizedMarkdownHtml } from "../markdown.ts";
+import { openExternalUrlSafe } from "../open-external-url.ts";
 import { detectTextDirection } from "../text-direction.ts";
 import type { MessageGroup } from "../types/chat-types.ts";
 import { renderCopyAsMarkdownButton } from "./copy-as-markdown.ts";
-import { resolveSafeImageOpenUrl } from "./image-open.ts";
 import {
   extractTextCached,
   extractThinkingCached,
@@ -202,15 +202,7 @@ function renderMessageImages(images: ImageBlock[]) {
   }
 
   const openImage = (url: string) => {
-    const safeUrl = resolveSafeImageOpenUrl(url, window.location.href);
-    if (!safeUrl) {
-      return;
-    }
-
-    const opened = window.open(safeUrl, "_blank", "noopener,noreferrer");
-    if (opened) {
-      opened.opener = null;
-    }
+    openExternalUrlSafe(url, { allowDataImage: true });
   };
 
   return html`
diff --git a/ui/src/ui/chat/image-open.test.ts b/ui/src/ui/chat/image-open.test.ts
deleted file mode 100644
index 180e909bb09..00000000000
--- a/ui/src/ui/chat/image-open.test.ts
+++ /dev/null
@@ -1,48 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { resolveSafeImageOpenUrl } from "./image-open.ts";
-
-describe("resolveSafeImageOpenUrl", () => {
-  const baseHref = "https://openclaw.ai/chat";
-
-  it("allows absolute https URLs", () => {
-    expect(resolveSafeImageOpenUrl("https://example.com/a.png?x=1#y", baseHref)).toBe(
-      "https://example.com/a.png?x=1#y",
-    );
-  });
-
-  it("allows relative URLs resolved against the current origin", () => {
-    expect(resolveSafeImageOpenUrl("/assets/pic.png", baseHref)).toBe(
-      "https://openclaw.ai/assets/pic.png",
-    );
-  });
-
-  it("allows blob URLs", () => {
-    expect(resolveSafeImageOpenUrl("blob:https://openclaw.ai/abc-123", baseHref)).toBe(
-      "blob:https://openclaw.ai/abc-123",
-    );
-  });
-
-  it("allows data image URLs", () => {
-    expect(resolveSafeImageOpenUrl("data:image/png;base64,iVBORw0KGgo=", baseHref)).toBe(
-      "data:image/png;base64,iVBORw0KGgo=",
-    );
-  });
-
-  it("rejects non-image data URLs", () => {
-    expect(
-      resolveSafeImageOpenUrl("data:text/html,<script>alert(1)</script>", baseHref),
-    ).toBeNull();
-  });
-
-  it("rejects javascript URLs", () => {
-    expect(resolveSafeImageOpenUrl("javascript:alert(1)", baseHref)).toBeNull();
-  });
-
-  it("rejects file URLs", () => {
-    expect(resolveSafeImageOpenUrl("file:///tmp/x.png", baseHref)).toBeNull();
-  });
-
-  it("rejects empty values", () => {
-    expect(resolveSafeImageOpenUrl("   ", baseHref)).toBeNull();
-  });
-});
diff --git a/ui/src/ui/chat/image-open.ts b/ui/src/ui/chat/image-open.ts
deleted file mode 100644
index fd096c67184..00000000000
--- a/ui/src/ui/chat/image-open.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-const DATA_URL_PREFIX = "data:";
-const ALLOWED_OPEN_PROTOCOLS = new Set(["http:", "https:", "blob:"]);
-
-function isAllowedDataImageUrl(url: string): boolean {
-  if (!url.toLowerCase().startsWith(DATA_URL_PREFIX)) {
-    return false;
-  }
-
-  const commaIndex = url.indexOf(",");
-  if (commaIndex < DATA_URL_PREFIX.length) {
-    return false;
-  }
-
-  const metadata = url.slice(DATA_URL_PREFIX.length, commaIndex);
-  const mimeType = metadata.split(";")[0]?.trim().toLowerCase() ?? "";
-  return mimeType.startsWith("image/");
-}
-
-export function resolveSafeImageOpenUrl(rawUrl: string, baseHref: string): string | null {
-  const candidate = rawUrl.trim();
-  if (!candidate) {
-    return null;
-  }
-
-  if (isAllowedDataImageUrl(candidate)) {
-    return candidate;
-  }
-
-  if (candidate.toLowerCase().startsWith(DATA_URL_PREFIX)) {
-    return null;
-  }
-
-  try {
-    const parsed = new URL(candidate, baseHref);
-    return ALLOWED_OPEN_PROTOCOLS.has(parsed.protocol.toLowerCase()) ? parsed.toString() : null;
-  } catch {
-    return null;
-  }
-}
diff --git a/ui/src/ui/open-external-url.test.ts b/ui/src/ui/open-external-url.test.ts
new file mode 100644
index 00000000000..8972516ed57
--- /dev/null
+++ b/ui/src/ui/open-external-url.test.ts
@@ -0,0 +1,56 @@
+import { describe, expect, it } from "vitest";
+import { resolveSafeExternalUrl } from "./open-external-url.ts";
+
+describe("resolveSafeExternalUrl", () => {
+  const baseHref = "https://openclaw.ai/chat";
+
+  it("allows absolute https URLs", () => {
+    expect(resolveSafeExternalUrl("https://example.com/a.png?x=1#y", baseHref)).toBe(
+      "https://example.com/a.png?x=1#y",
+    );
+  });
+
+  it("allows relative URLs resolved against the current origin", () => {
+    expect(resolveSafeExternalUrl("/assets/pic.png", baseHref)).toBe(
+      "https://openclaw.ai/assets/pic.png",
+    );
+  });
+
+  it("allows blob URLs", () => {
+    expect(resolveSafeExternalUrl("blob:https://openclaw.ai/abc-123", baseHref)).toBe(
+      "blob:https://openclaw.ai/abc-123",
+    );
+  });
+
+  it("allows data image URLs when enabled", () => {
+    expect(
+      resolveSafeExternalUrl("data:image/png;base64,iVBORw0KGgo=", baseHref, {
+        allowDataImage: true,
+      }),
+    ).toBe("data:image/png;base64,iVBORw0KGgo=");
+  });
+
+  it("rejects non-image data URLs", () => {
+    expect(
+      resolveSafeExternalUrl("data:text/html,<script>alert(1)</script>", baseHref, {
+        allowDataImage: true,
+      }),
+    ).toBeNull();
+  });
+
+  it("rejects data image URLs unless explicitly enabled", () => {
+    expect(resolveSafeExternalUrl("data:image/png;base64,iVBORw0KGgo=", baseHref)).toBeNull();
+  });
+
+  it("rejects javascript URLs", () => {
+    expect(resolveSafeExternalUrl("javascript:alert(1)", baseHref)).toBeNull();
+  });
+
+  it("rejects file URLs", () => {
+    expect(resolveSafeExternalUrl("file:///tmp/x.png", baseHref)).toBeNull();
+  });
+
+  it("rejects empty values", () => {
+    expect(resolveSafeExternalUrl("   ", baseHref)).toBeNull();
+  });
+});
diff --git a/ui/src/ui/open-external-url.ts b/ui/src/ui/open-external-url.ts
new file mode 100644
index 00000000000..321e69a71fc
--- /dev/null
+++ b/ui/src/ui/open-external-url.ts
@@ -0,0 +1,68 @@
+const DATA_URL_PREFIX = "data:";
+const ALLOWED_EXTERNAL_PROTOCOLS = new Set(["http:", "https:", "blob:"]);
+
+function isAllowedDataImageUrl(url: string): boolean {
+  if (!url.toLowerCase().startsWith(DATA_URL_PREFIX)) {
+    return false;
+  }
+
+  const commaIndex = url.indexOf(",");
+  if (commaIndex < DATA_URL_PREFIX.length) {
+    return false;
+  }
+
+  const metadata = url.slice(DATA_URL_PREFIX.length, commaIndex);
+  const mimeType = metadata.split(";")[0]?.trim().toLowerCase() ?? "";
+  return mimeType.startsWith("image/");
+}
+
+export type ResolveSafeExternalUrlOptions = {
+  allowDataImage?: boolean;
+};
+
+export function resolveSafeExternalUrl(
+  rawUrl: string,
+  baseHref: string,
+  opts: ResolveSafeExternalUrlOptions = {},
+): string | null {
+  const candidate = rawUrl.trim();
+  if (!candidate) {
+    return null;
+  }
+
+  if (opts.allowDataImage === true && isAllowedDataImageUrl(candidate)) {
+    return candidate;
+  }
+
+  if (candidate.toLowerCase().startsWith(DATA_URL_PREFIX)) {
+    return null;
+  }
+
+  try {
+    const parsed = new URL(candidate, baseHref);
+    return ALLOWED_EXTERNAL_PROTOCOLS.has(parsed.protocol.toLowerCase()) ? parsed.toString() : null;
+  } catch {
+    return null;
+  }
+}
+
+export type OpenExternalUrlSafeOptions = ResolveSafeExternalUrlOptions & {
+  baseHref?: string;
+};
+
+export function openExternalUrlSafe(
+  rawUrl: string,
+  opts: OpenExternalUrlSafeOptions = {},
+): WindowProxy | null {
+  const baseHref = opts.baseHref ?? window.location.href;
+  const safeUrl = resolveSafeExternalUrl(rawUrl, baseHref, opts);
+  if (!safeUrl) {
+    return null;
+  }
+
+  const opened = window.open(safeUrl, "_blank", "noopener,noreferrer");
+  if (opened) {
+    opened.opener = null;
+  }
+  return opened;
+}
diff --git a/ui/src/ui/views/chat-image-open.browser.test.ts b/ui/src/ui/views/chat-image-open.browser.test.ts
new file mode 100644
index 00000000000..60e6df26554
--- /dev/null
+++ b/ui/src/ui/views/chat-image-open.browser.test.ts
@@ -0,0 +1,53 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { mountApp, registerAppMountHooks } from "../test-helpers/app-mount.ts";
+
+registerAppMountHooks();
+
+afterEach(() => {
+  vi.restoreAllMocks();
+});
+
+function renderAssistantImage(url: string) {
+  return {
+    role: "assistant",
+    content: [{ type: "image_url", image_url: { url } }],
+    timestamp: Date.now(),
+  };
+}
+
+describe("chat image open safety", () => {
+  it("opens safe image URLs in a hardened new tab", async () => {
+    const app = mountApp("/chat");
+    await app.updateComplete;
+
+    const openSpy = vi.spyOn(window, "open").mockReturnValue(null);
+    app.chatMessages = [renderAssistantImage("https://example.com/cat.png")];
+    await app.updateComplete;
+
+    const image = app.querySelector<HTMLImageElement>(".chat-message-image");
+    expect(image).not.toBeNull();
+    image?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+
+    expect(openSpy).toHaveBeenCalledTimes(1);
+    expect(openSpy).toHaveBeenCalledWith(
+      "https://example.com/cat.png",
+      "_blank",
+      "noopener,noreferrer",
+    );
+  });
+
+  it("does not open unsafe image URLs", async () => {
+    const app = mountApp("/chat");
+    await app.updateComplete;
+
+    const openSpy = vi.spyOn(window, "open").mockReturnValue(null);
+    app.chatMessages = [renderAssistantImage("javascript:alert(1)")];
+    await app.updateComplete;
+
+    const image = app.querySelector<HTMLImageElement>(".chat-message-image");
+    expect(image).not.toBeNull();
+    image?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+
+    expect(openSpy).not.toHaveBeenCalled();
+  });
+});