diff --git a/src/chat/canvas-render.ts b/src/chat/canvas-render.ts
index 42cce392d199..0d879efd35d9 100644
--- a/src/chat/canvas-render.ts
+++ b/src/chat/canvas-render.ts
@@ -108,6 +108,10 @@ function normalizePreferredHeight(value: number | undefined): number | undefined
     : undefined;
 }
 
+export function isCanvasBoardWidgetName(value: unknown): value is string {
+  return typeof value === "string" && /^[a-z0-9][a-z0-9._-]{0,63}$/u.test(value);
+}
+
 function coerceCanvasPreview(
   record: Record<string, unknown> | undefined,
 ): CanvasPreview | undefined {
@@ -145,10 +149,9 @@ function coerceCanvasPreview(
   const viewUrl = getRecordStringField(view, "url") ?? getRecordStringField(view, "entryUrl");
   const viewId = getRecordStringField(view, "id") ?? getRecordStringField(view, "docId");
   const requestedBoardWidgetName = getRecordStringField(view, "boardWidgetName");
-  const boardWidgetName =
-    requestedBoardWidgetName && /^[a-z0-9][a-z0-9._-]{0,63}$/u.test(requestedBoardWidgetName)
-      ? requestedBoardWidgetName
-      : undefined;
+  const boardWidgetName = isCanvasBoardWidgetName(requestedBoardWidgetName)
+    ? requestedBoardWidgetName
+    : undefined;
   if (mcpAppViewId && viewId === mcpAppViewId) {
     return {
       kind: "canvas",
diff --git a/ui/src/lib/chat/message-normalizer.test.ts b/ui/src/lib/chat/message-normalizer.test.ts
index ed9ac113bbfa..e9ae2481b0be 100644
--- a/ui/src/lib/chat/message-normalizer.test.ts
+++ b/ui/src/lib/chat/message-normalizer.test.ts
@@ -347,7 +347,7 @@ describe("message-normalizer", () => {
       ]);
     });
 
-    it("preserves a canvas preview sandbox ceiling from history", () => {
+    it("preserves canvas dashboard identity and sandbox ceiling from history", () => {
       const result = normalizeMessage({
         role: "assistant",
         content: [
@@ -359,6 +359,7 @@ describe("message-normalizer", () => {
               render: "url",
               url: "/__openclaw__/canvas/documents/cv_widget/index.html",
               sandbox: "scripts",
+              boardWidgetName: "release-status",
             },
           },
         ],
@@ -366,10 +367,31 @@ describe("message-normalizer", () => {
 
       expect(result.content[0]).toMatchObject({
         type: "canvas",
-        preview: { sandbox: "scripts" },
+        preview: { sandbox: "scripts", boardWidgetName: "release-status" },
       });
     });
 
+    it("drops invalid canvas dashboard identity from history", () => {
+      const result = normalizeMessage({
+        role: "assistant",
+        content: [
+          {
+            type: "canvas",
+            preview: {
+              kind: "canvas",
+              surface: "assistant_message",
+              render: "url",
+              url: "/__openclaw__/canvas/documents/cv_widget/index.html",
+              boardWidgetName: "Invalid widget name",
+            },
+          },
+        ],
+      });
+
+      expect(result.content[0]).toMatchObject({ type: "canvas" });
+      expect(result.content[0]).not.toHaveProperty("preview.boardWidgetName");
+    });
+
     it("ignores [embed] shortcodes inside fenced code blocks", () => {
       const result = normalizeMessage({
         role: "assistant",
diff --git a/ui/src/lib/chat/message-normalizer.ts b/ui/src/lib/chat/message-normalizer.ts
index 4034c2eef8b4..fbcd1338d401 100644
--- a/ui/src/lib/chat/message-normalizer.ts
+++ b/ui/src/lib/chat/message-normalizer.ts
@@ -5,7 +5,10 @@
 import { mediaKindFromMime } from "@openclaw/media-core/constants";
 import { asRecord as asMessageRecord, isRecord } from "@openclaw/normalization-core/record-coerce";
 import { stripInboundMetadata } from "../../../../src/auto-reply/reply/strip-inbound-meta.js";
-import { extractCanvasShortcodes } from "../../../../src/chat/canvas-render.js";
+import {
+  extractCanvasShortcodes,
+  isCanvasBoardWidgetName,
+} from "../../../../src/chat/canvas-render.js";
 import {
   isToolCallContentType,
   isToolResultContentType,
@@ -111,6 +114,9 @@ function coerceCanvasPreview(
     return null;
   }
   const mcpApp = isRecord(preview.mcpApp) ? preview.mcpApp : undefined;
+  const boardWidgetName = isCanvasBoardWidgetName(preview.boardWidgetName)
+    ? preview.boardWidgetName
+    : undefined;
   return {
     kind: "canvas",
     surface: "assistant_message",
@@ -126,6 +132,7 @@ function coerceCanvasPreview(
     ...(preview.sandbox === "strict" || preview.sandbox === "scripts"
       ? { sandbox: preview.sandbox }
       : {}),
+    ...(boardWidgetName ? { boardWidgetName } : {}),
     ...(typeof mcpApp?.viewId === "string" && mcpApp.viewId.trim()
       ? {
           mcpApp: {