feat(mindspace): 全部页面管理、级联删除与页面同步去重

支持全部页面分页/多选/删除/分享，删除时可选移除广场帖并清理工作区附件；修复并发同步重复创建页面，并补齐预览下载链接重写与 iframe 下载权限。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/api/client.ts

@@ -697,18 +697,36 @@ export async function getMindSpacePageDeletePreview(
   return result.data;
 }
 
-export async function deleteMindSpacePage(pageId: string): Promise<MindSpacePageDeleteResult> {
+export async function deleteMindSpacePage(
+  pageId: string,
+  options?: { removeFromPlaza?: boolean },
+): Promise<MindSpacePageDeleteResult> {
+  const params = new URLSearchParams();
+  if (options?.removeFromPlaza) params.set('remove_from_plaza', 'true');
+  const query = params.toString() ? `?${params.toString()}` : '';
   const result = await apiFetch<{ data: MindSpacePageDeleteResult }>(
-    `/mindspace/v1/pages/${encodeURIComponent(pageId)}`,
+    `/mindspace/v1/pages/${encodeURIComponent(pageId)}${query}`,
     { method: 'DELETE' },
   );
   return result.data;
 }
 
-export async function listMindSpacePages(status?: string): Promise<MindSpacePage[]> {
-  const query = status ? `?status=${encodeURIComponent(status)}` : '';
-  const result = await apiFetch<{ data: MindSpacePage[] }>(`/mindspace/v1/pages${query}`);
-  return result.data;
+export async function listMindSpacePages(options?: {
+  status?: string;
+  limit?: number;
+  offset?: number;
+  categoryCode?: string;
+}): Promise<{ items: MindSpacePage[]; page: MindSpaceListPage }> {
+  const params = new URLSearchParams();
+  if (options?.status) params.set('status', options.status);
+  if (options?.limit != null) params.set('limit', String(options.limit));
+  if (options?.offset != null) params.set('offset', String(options.offset));
+  if (options?.categoryCode) params.set('category_code', options.categoryCode);
+  const query = params.toString() ? `?${params.toString()}` : '';
+  const result = await apiFetch<{ data: MindSpacePage[]; page?: MindSpaceListPage }>(
+    `/mindspace/v1/pages${query}`,
+  );
+  return { items: result.data, page: result.page ?? {} };
 }
 
 export async function getMindSpacePage(pageId: string): Promise<MindSpacePage> {