fix(canvas): dedupe Claw table images

components/canvas/CanvasChatPanel.tsx

@@ -281,6 +281,7 @@ import {
   extractCanvasModelName,
   extractImageUrls,
   extractVideoUrls,
+  filterStandaloneAssistantImageUrls,
   formatMessageDateLabel,
   getAssistantImageNodeIdentityKey,
   getCanvasAssistantMessagesAfterTargetUser,
@@ -14925,9 +14926,12 @@ export function CanvasChatPanel({
                                 const shouldDeferAssistantMedia =
                                   (isClawAssistantMessage || shouldTypeAgentAssistantMessage) &&
                                   (shouldAnimateAnalysis || shouldAnimatePlainText);
+                                const standaloneImageUrls = isClawAssistantMessage
+                                  ? filterStandaloneAssistantImageUrls(rawText, imageUrls)
+                                  : imageUrls;
                                 const visibleImageUrls = shouldDeferAssistantMedia
                                   ? []
-                                  : imageUrls;
+                                  : standaloneImageUrls;
                                 const visibleVideoUrls = shouldDeferAssistantMedia
                                   ? []
                                   : videoUrls;

components/canvas/chat-panel/canvas-chat-media.ts

@@ -245,6 +245,80 @@ export function extractAssistantImageUrls(
   });
 }
 
+function isMarkdownTableRow(line: string): boolean {
+  const trimmed = String(line || "").trim();
+  if (!trimmed || !trimmed.includes("|")) return false;
+
+  const cells = trimmed
+    .replace(/^\|/, "")
+    .replace(/\|$/, "")
+    .split("|");
+  return cells.length >= 2;
+}
+
+function isMarkdownTableSeparator(line: string): boolean {
+  if (!isMarkdownTableRow(line)) return false;
+
+  const cells = String(line || "")
+    .trim()
+    .replace(/^\|/, "")
+    .replace(/\|$/, "")
+    .split("|")
+    .map((cell) => cell.trim().replace(/\s+/g, ""));
+  return cells.length >= 2 && cells.every((cell) => /^:?-{3,}:?$/.test(cell));
+}
+
+export function getMarkdownTableImageUrlKeys(text: string): Set<string> {
+  const urlKeys = new Set<string>();
+  const lines = String(text || "").replace(/\r\n/g, "\n").split("\n");
+  let inCodeFence = false;
+
+  const addUrl = (url: string) => {
+    const key = normalizeImageIdentityUrl(url);
+    if (key) urlKeys.add(key);
+  };
+
+  for (let index = 0; index < lines.length - 1; index += 1) {
+    const line = lines[index] || "";
+    if (/^\s*```/.test(line)) {
+      inCodeFence = !inCodeFence;
+      continue;
+    }
+    if (
+      inCodeFence ||
+      !isMarkdownTableRow(line) ||
+      !isMarkdownTableSeparator(lines[index + 1] || "")
+    ) {
+      continue;
+    }
+
+    let endIndex = index + 2;
+    while (endIndex < lines.length && isMarkdownTableRow(lines[endIndex] || "")) {
+      endIndex += 1;
+    }
+
+    const tableText = lines.slice(index, endIndex).join("\n");
+    extractAssistantImageUrls(tableText).forEach(addUrl);
+    extractPlainImageUrls(tableText).forEach(addUrl);
+    index = endIndex - 1;
+  }
+
+  return urlKeys;
+}
+
+export function filterStandaloneAssistantImageUrls(
+  text: string,
+  imageUrls: string[]
+): string[] {
+  const tableImageUrlKeys = getMarkdownTableImageUrlKeys(text);
+  if (tableImageUrlKeys.size === 0) return imageUrls;
+
+  return imageUrls.filter((url) => {
+    const key = normalizeImageIdentityUrl(url);
+    return !key || !tableImageUrlKeys.has(key);
+  });
+}
+
 export function extractVideoUrls(text: string): string[] {
   if (!text) return [];
   const urls = new Set<string>();

tests/routes/canvas-chat-helpers.test.ts

@@ -3,6 +3,8 @@ import {
   collectMessageImageUrls,
   extractAssistantImageUrls,
   extractVideoUrls,
+  filterStandaloneAssistantImageUrls,
+  getMarkdownTableImageUrlKeys,
   normalizeMediaUrl,
   sortCanvasMessagesByCreatedAt,
   stripMediaMarkup,
@@ -5175,6 +5177,29 @@ test.describe("canvas chat pure helpers", () => {
     expect(urls).toEqual(["https://cdn.example.com/result.png?token=secret"]);
   });
 
+  test("does not append Claw images that already render inside markdown tables", () => {
+    const markdown = [
+      "| 商品 | 主图 |",
+      "| --- | --- |",
+      "| A | ![主图](https://cdn.example.com/table-image.png?token=secret) |",
+      "| B | [查看](https://cdn.example.com/table-link.webp?token=secret) |",
+      "",
+      "补充图片：",
+      "![补充](https://cdn.example.com/standalone-image.jpg?token=secret)",
+    ].join("\n");
+    const imageUrls = extractAssistantImageUrls(markdown);
+
+    expect(getMarkdownTableImageUrlKeys(markdown)).toEqual(
+      new Set([
+        "https://cdn.example.com/table-image.png",
+        "https://cdn.example.com/table-link.webp",
+      ])
+    );
+    expect(filterStandaloneAssistantImageUrls(markdown, imageUrls)).toEqual([
+      "https://cdn.example.com/standalone-image.jpg?token=secret",
+    ]);
+  });
+
   test("extracts and strips video markup without removing surrounding text", () => {
     const text = [
       "生成完成",