feat: add chat page export actions

src/api/client.ts

@@ -958,6 +958,41 @@ export async function quickShareFromChat(input: {
   return result.data;
 }
 
+export async function downloadChatMessageDocx(input: {
+  sessionId: string;
+  messageId: string;
+  selectedLinkIndex?: number;
+}): Promise<{ blob: Blob; filename: string }> {
+  let res: Response;
+  try {
+    res = await fetch(`${API}/mindspace/v1/pages/chat-save-docx`, {
+      method: 'POST',
+      credentials: 'same-origin',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        session_id: input.sessionId,
+        message_id: input.messageId,
+        selected_link_index: input.selectedLinkIndex ?? 0,
+      }),
+    });
+  } catch (err) {
+    throw new ApiError(0, formatNetworkError(err));
+  }
+  if (res.status === 401) {
+    notifyUnauthorized();
+    throw new ApiError(401, '未授权，请重新登录');
+  }
+  if (!res.ok) {
+    const parsed = await parseErrorResponse(res);
+    throw new ApiError(res.status, parsed.message || `${res.status} ${res.statusText}`, parsed.code);
+  }
+  const disposition = res.headers.get('Content-Disposition') ?? '';
+  const filenameMatch =
+    disposition.match(/filename\*=UTF-8''([^;]+)/i) || disposition.match(/filename="?([^";]+)"?/i);
+  const filename = filenameMatch ? decodeURIComponent(filenameMatch[1]) : 'mindspace-document.docx';
+  return { blob: await res.blob(), filename };
+}
+
 export async function fetchPreviewAsset(path: string): Promise<string> {
   let res: Response;
   try {