fix(chat): translate session replay cursors

session-stream-store.test.mjs

@@ -23,7 +23,7 @@ function createMockPool() {
       }
       if (sql.includes('WHERE id = ? AND agent_session_id = ?')) {
         const row = events.find((item) => item.id === params[0]);
-        return [[row ? { created_at: row.created_at } : undefined].filter(Boolean)];
+        return [[row].filter(Boolean)];
       }
       if (sql.includes('created_at > ?')) {
         const after = Number(params[2]);
@@ -67,12 +67,14 @@ test('session stream store append and replay with cursor', async () => {
     sessionId: 'sess-1',
     payload: { type: 'Message', message: { role: 'assistant', content: [] } },
     id: 'evt-1',
+    upstreamEventId: 'upstream-1',
   });
   await store.appendEvent({
     userId: 'user-1',
     sessionId: 'sess-1',
     payload: { type: 'Finish' },
     id: 'evt-2',
+    upstreamEventId: 'upstream-2',
   });
 
   const head = await store.listEventsForUser('user-1', 'sess-1');
@@ -82,7 +84,10 @@ test('session stream store append and replay with cursor', async () => {
   assert.equal(tail.events.length, 1);
   assert.equal(tail.events[0].payload.type, 'Finish');
   assert.equal(tail.cursorMiss, false);
+  assert.equal(tail.cursorEvent.id, first.id);
+  assert.equal(tail.cursorEvent.upstreamEventId, 'upstream-1');
 
   const miss = await store.listEventsForUser('user-1', 'sess-1', { afterEventId: 'missing' });
   assert.equal(miss.cursorMiss, true);
+  assert.equal(miss.cursorEvent, null);
 });