fix(mindspace): 公开页上传图片物化到 static 路径供转发访问

Finish 同步与首次访问时将私有资产 API 图片复制到 public/.tmp-images，
避免其他用户转发链接后因无登录态无法加载页面内图片。

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

mindspace-public-finish-sync.mjs

@@ -1,7 +1,7 @@
 import fs from 'node:fs';
 import path from 'node:path';
 
-import { extractStaticPageLinks } from './mindspace-chat-save.mjs';
+import { extractStaticPageLinks, materializePrivateAssetsInPublicHtmlFiles } from './mindspace-chat-save.mjs';
 import { DOWNLOADABLE_FILE_PATTERN } from './mindspace-html-download-links.mjs';
 import { scheduleWorkspaceHtmlThumbnailSidecars } from './mindspace-workspace-thumbnails.mjs';
 
@@ -480,6 +480,9 @@ export async function syncPublicHtmlAfterFinish({
   syncWorkspaceAssets,
   registerPublicHtmlArtifacts,
   sessionId = null,
+  pool = null,
+  storageRoot = null,
+  h5Root = null,
 } = {}) {
   if (!hasRecentOwnPublicHtmlReference(messages, currentUser, { publishDir })) {
     return { materialized: [], skipped: [], synced: false };
@@ -496,6 +499,17 @@ export async function syncPublicHtmlAfterFinish({
   });
   const publicHtmlRelativePaths = publicHtmlArtifactRefs.map((ref) => ref.relativePath);
   const sourceMessageId = publicHtmlArtifactRefs.find((ref) => ref.messageId)?.messageId ?? null;
+  let assetMaterialization = { materialized: [], skipped: [] };
+  if (pool && storageRoot && h5Root && currentUser?.id && publicHtmlRelativePaths.length > 0) {
+    assetMaterialization = await materializePrivateAssetsInPublicHtmlFiles({
+      pool,
+      storageRoot,
+      h5Root,
+      userId: currentUser.id,
+      publishDir,
+      relativePaths: publicHtmlRelativePaths,
+    }).catch(() => ({ materialized: [], skipped: publicHtmlRelativePaths }));
+  }
   let synced = false;
   if (typeof syncWorkspaceAssets === 'function' && currentUser?.id) {
     await syncWorkspaceAssets(currentUser.id, {
@@ -512,5 +526,13 @@ export async function syncPublicHtmlAfterFinish({
       artifactRefs: publicHtmlArtifactRefs,
     });
   }
-  return { materialized, skipped, synced, docxSync, publicHtmlRelativePaths, publicHtmlArtifactRefs };
+  return {
+    materialized,
+    skipped,
+    synced,
+    docxSync,
+    publicHtmlRelativePaths,
+    publicHtmlArtifactRefs,
+    assetMaterialization,
+  };
 }