Record chat docx artifacts in packages

server.mjs

@@ -43,7 +43,10 @@ import { ensureMindSpaceConfig } from './mindspace-config.mjs';
 import { createAssetService } from './mindspace-assets.mjs';
 import { createPageService, pageInternals, inlinePrivateAssetsInHtml, normalizeWorkspaceRelativePath } from './mindspace-pages.mjs';
 import { createConversationPackageRegistry } from './mindspace-conversation-package-registry.mjs';
-import { createGetConversationPackageHandler } from './mindspace-conversation-package-routes.mjs';
+import {
+  createDownloadConversationPackageArtifactHandler,
+  createGetConversationPackageHandler,
+} from './mindspace-conversation-package-routes.mjs';
 import { createConversationPackageStore } from './mindspace-conversation-package-store.mjs';
 import { createMindSpaceServiceFacade } from './mindspace-service.mjs';
 import { createLocalMindSpaceStorageAdapter } from './mindspace-storage-adapter.mjs';
@@ -2496,6 +2499,16 @@ api.get('/mindspace/v1/conversation-packages/:sessionId', createGetConversationP
   mindSpaceError,
 }));
 
+api.get(
+  '/mindspace/v1/conversation-packages/:sessionId/artifacts/:artifactId/download',
+  createDownloadConversationPackageArtifactHandler({
+    getRegistry: () => mindSpaceConversationPackageRegistry,
+    getUserAuth: () => userAuth,
+    ensureMindSpaceEnabled,
+    mindSpaceError,
+  }),
+);
+
 api.post('/mindspace/v1/uploads', async (req, res) => {
   if (!mindSpaceAssets || !ensureMindSpaceEnabled(res, req, { upload: true })) return;
   try {
@@ -2874,6 +2887,7 @@ async function resolveExistingSavedPage(userId, { sessionId, messageId, relative
 }
 
 const SAVE_TARGET_CATEGORIES = new Set(['draft', 'oa', 'public']);
+const DOCX_MIME_TYPE = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
 
 const pageSyncInFlight = new Map();
 
@@ -2993,6 +3007,58 @@ async function resolveChatSaveBundle(user, h5Root, input = {}) {
   };
 }
 
+async function registerChatDocxArtifactForConversation({
+  user,
+  bundle,
+  requestBody = {},
+  filename,
+  buffer,
+}) {
+  if (!mindSpaceConversationPackageRegistry || !user?.id || !filename || !Buffer.isBuffer(buffer)) return;
+  const sessionId = String(requestBody.session_id ?? requestBody.sessionId ?? '').trim();
+  const messageId = String(requestBody.message_id ?? requestBody.messageId ?? '').trim();
+  if (!sessionId || !messageId) return;
+  try {
+    const selectedLinkIndex = Number(requestBody.selected_link_index ?? requestBody.selectedLinkIndex ?? 0);
+    const hash = crypto
+      .createHash('sha256')
+      .update(`${user.id}:${sessionId}:${messageId}:${selectedLinkIndex}:${filename}`)
+      .digest('hex')
+      .slice(0, 16);
+    const artifactId = `ca_docx_${hash}`;
+    const relativePath = `artifacts/${artifactId}/${filename}`;
+    const { packageRecord, writeResult } =
+      await mindSpaceConversationPackageRegistry.putObjectForSession({
+        userId: user.id,
+        sessionId,
+        title: bundle?.source?.session?.name ?? null,
+        relativePath,
+        body: buffer,
+      });
+    const canonicalUrl =
+      `/api/mindspace/v1/conversation-packages/${encodeURIComponent(sessionId)}` +
+      `/artifacts/${encodeURIComponent(artifactId)}/download`;
+    await mindSpaceConversationPackageRegistry.recordArtifact({
+      id: artifactId,
+      packageId: packageRecord.id,
+      artifactKind: 'docx',
+      messageId,
+      displayName: filename,
+      mimeType: DOCX_MIME_TYPE,
+      sizeBytes: buffer.length,
+      storageKey: writeResult.key,
+      canonicalUrl,
+      sortOrder: Date.now(),
+    });
+    await mindSpaceConversationPackageRegistry.writeManifestForSession({
+      userId: user.id,
+      sessionId,
+    });
+  } catch (error) {
+    console.warn('[MindSpace] failed to record chat docx artifact:', error?.message ?? error);
+  }
+}
+
 api.get('/mindspace/v1/pages/chat-save-preview', async (req, res) => {
   if (!mindSpacePages) return res.status(503).json({ message: 'MindSpace 未启用' });
   try {
@@ -3177,7 +3243,14 @@ async function handleChatSaveDocx(req, res) {
       .replace(/^-+|-+$/g, '')
       .slice(0, 60) || 'mindspace-document';
     const filename = `${filenameBase}.docx`;
-    res.set('Content-Type', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
+    await registerChatDocxArtifactForConversation({
+      user: req.currentUser,
+      bundle,
+      requestBody: req.body,
+      filename,
+      buffer,
+    });
+    res.set('Content-Type', DOCX_MIME_TYPE);
     res.set(
       'Content-Disposition',
       `attachment; filename="${encodeURIComponent(filename)}"; filename*=UTF-8''${encodeURIComponent(filename)}`,