fix: persist direct chat transcript before Goosed escalation

Prevent portal direct-chat history from being lost when snapshot cache
is invalidated on Goosed submit by writing non-empty messages to DB first,
and stop caching empty Goose placeholder messages in snapshots.

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

agent-run-gateway.mjs

@@ -2,6 +2,11 @@ import crypto from 'node:crypto';
 import fs from 'node:fs/promises';
 import path from 'node:path';
 import { isDirectChatSessionId } from './direct-chat-service.mjs';
+import {
+  loadSnapshotMessages,
+  persistSessionTranscriptFromSnapshot,
+  persistSessionTranscriptMessages,
+} from './conversation-transcript-persist.mjs';
 
 const DEFAULT_RUN_RETRY_DELAYS_MS = [1500, 5000, 15000];
 const TERMINAL_STATUSES = new Set(['succeeded', 'failed']);
@@ -225,6 +230,7 @@ export function createAgentRunGateway({
   directChatService = null,
   chatIntentRouter = null,
   sessionSnapshotService = null,
+  conversationMemoryService = null,
   retryDelaysMs = DEFAULT_RUN_RETRY_DELAYS_MS,
   autoDispatch = envFlag(process.env.MEMIND_AGENT_RUN_AUTODISPATCH, true),
   maxConcurrentRuns = positiveInteger(
@@ -546,7 +552,9 @@ export function createAgentRunGateway({
     }
 
     let sessionId = row.agent_session_id ?? null;
+    let escalatedDirectSessionId = null;
     if (isDirectChatSessionId(sessionId)) {
+      escalatedDirectSessionId = sessionId;
       await appendEvent(runId, 'direct_session_escalated_to_deep_reasoning', {
         previousSessionId: sessionId,
       });
@@ -568,8 +576,39 @@ export function createAgentRunGateway({
         toolMode: runOptions.toolMode,
         taskType: runOptions.taskType,
       });
+      if (escalatedDirectSessionId) {
+        const priorMessages = await loadSnapshotMessages(
+          sessionSnapshotService,
+          escalatedDirectSessionId,
+        );
+        const persisted = await persistSessionTranscriptMessages({
+          conversationMemoryService,
+          sessionId,
+          userId: row.user_id,
+          messages: priorMessages,
+        });
+        if (persisted.saved > 0) {
+          await appendEvent(runId, 'direct_session_transcript_persisted', {
+            previousSessionId: escalatedDirectSessionId,
+            sessionId,
+            saved: persisted.saved,
+          });
+        }
+      }
     }
 
+    const transcriptPersisted = await persistSessionTranscriptFromSnapshot({
+      sessionSnapshotService,
+      conversationMemoryService,
+      sessionId,
+      userId: row.user_id,
+    });
+    if (transcriptPersisted.saved > 0) {
+      await appendEvent(runId, 'portal_direct_transcript_persisted', {
+        sessionId,
+        saved: transcriptPersisted.saved,
+      });
+    }
     await invalidatePortalDirectChatSnapshot(sessionId);
     await tkmindProxy.submitSessionReplyForUser(
       row.user_id,