fix: unblock agent events after portal direct chat escalation

When a session starts with LLM direct chat then escalates to goosed,
invalidate the portal-direct-chat snapshot and stop replaying stale SSE
so page-generation turns stream and finish correctly.

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

server.mjs

@@ -164,7 +164,7 @@ import { createScheduleService } from './schedule-service.mjs';
 import { createFeedbackService } from './user-feedback.mjs';
 import { startScheduleReminderWorker } from './schedule-reminder-worker.mjs';
 import { createLlmProviderService, RELAY_BOOTSTRAP } from './llm-providers.mjs';
-import { createDirectChatService, isDirectChatSessionId, isPortalDirectChatSnapshot, sendDirectChatSessionEvents } from './direct-chat-service.mjs';
+import { createDirectChatService, isDirectChatSessionId, isPortalDirectChatSnapshot, sendDirectChatSessionEvents, shouldExpirePortalDirectChatSnapshot } from './direct-chat-service.mjs';
 import { createManagedChatIntentRouter } from './chat-intent-router.mjs';
 import { createSessionSnapshotService } from './session-snapshot.mjs';
 import { createConversationMemoryService } from './conversation-memory.mjs';
@@ -580,6 +580,7 @@ async function bootstrapUserAuth() {
       toolGateway,
       directChatService,
       chatIntentRouter,
+      sessionSnapshotService,
       autoDispatch: ['1', 'true', 'yes', 'on'].includes(
         String(process.env.MEMIND_AGENT_RUN_AUTODISPATCH ?? '1').trim().toLowerCase(),
       ),
@@ -4470,7 +4471,13 @@ api.get('/sessions/:sessionId', async (req, res, next) => {
 
   try {
     if (sessionSnapshotService?.isEnabled()) {
-      const snapshot = await sessionSnapshotService.get(sessionId);
+      let snapshot = await sessionSnapshotService.get(sessionId);
+      if (snapshot) {
+        if (authPool && await shouldExpirePortalDirectChatSnapshot(authPool, sessionId, snapshot)) {
+          await sessionSnapshotService.remove(sessionId).catch(() => {});
+          snapshot = null;
+        }
+      }
       if (snapshot) {
         // REGRESSION GUARD: without both hints, stale snapshot can wipe mid-turn chat.
         const canUseSnapshotCache = hintMc != null && hintUa != null;
@@ -4478,7 +4485,7 @@ api.get('/sessions/:sessionId', async (req, res, next) => {
         const uaMatch = snapshot.meta.source_updated_at === hintUa;
         if (
           isDirectChatSessionId(sessionId) ||
-          isPortalDirectChatSnapshot(snapshot) ||
+          isPortalDirectChatSnapshot(snapshot, { sessionId }) ||
           (canUseSnapshotCache && mcMatch && uaMatch)
         ) {
           const sanitizedMessages = sanitizeSessionConversationPublicHtmlLinks(
@@ -4581,7 +4588,13 @@ api.get('/sessions/:sessionId/events', async (req, res, next) => {
     return sendDirectChatSessionEvents(req, res, snapshot);
   }
   const portalDirectSnapshot = await sessionSnapshotService?.get(sessionId).catch(() => null);
-  if (isPortalDirectChatSnapshot(portalDirectSnapshot)) {
+  if (
+    portalDirectSnapshot &&
+    authPool &&
+    await shouldExpirePortalDirectChatSnapshot(authPool, sessionId, portalDirectSnapshot)
+  ) {
+    await sessionSnapshotService?.remove(sessionId).catch(() => {});
+  } else if (portalDirectSnapshot && isPortalDirectChatSnapshot(portalDirectSnapshot, { sessionId })) {
     return sendDirectChatSessionEvents(req, res, portalDirectSnapshot);
   }
   const publishDir = resolveMindSpaceUserPublishDir(__dirname, { id: req.currentUser.id });