fix: portal stability, session list DB fallback, and UX polish

- Free stale Memind listeners on 8081 before startup and exit cleanly on EADDRINUSE
- Backfill owned sessions missing from Goose via h5_conversation_messages summaries
- Strip Memind task orchestration prefixes from user-facing chat text
- Repair missing public docx links before release MindSpace link checks

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

server.mjs

@@ -5723,15 +5723,24 @@ app.get('*', (_req, res) => {
   res.sendFile(path.join(__dirname, 'dist', 'index.html'));
 });
 
-userAuthReady.then((enabled) => {
+  userAuthReady.then((enabled) => {
   if (isDatabaseConfigured() && !enabled && process.env.NODE_ENV === 'production') {
     console.error('Refusing to start portal without user auth while database is configured');
     process.exit(1);
   }
-  app.listen(PORT, HOST, () => {
+  const server = app.listen(PORT, HOST, () => {
     console.log(`TKMind H5 @ http://${HOST}:${PORT}`);
     console.log(`Proxy -> ${API_TARGETS.join(', ')}`);
     console.log(`Auth  -> ${enabled ? 'multi-user (MySQL)' : legacyAuth ? 'legacy password' : 'disabled'}`);
     console.log(`Wiki  @ http://${HOST}:${PORT}/${PUBLISH_ROOT_DIR}/wiki`);
   });
+  server.on('error', (err) => {
+    if (err?.code === 'EADDRINUSE') {
+      console.error(
+        `Port ${PORT} already in use (${HOST}:${PORT}); exiting so LaunchAgent can retry after ThrottleInterval`,
+      );
+      process.exit(1);
+    }
+    throw err;
+  });
 });