persistence-angular Actual framework app and LangGraph runtime; existing aimock responses, 12-character chunks with 100ms fixture delay. No live provider requests. Footage runs at actual speed; initial page loading is trimmed. No narration. Input: Hello 00:00:00.000 Send a message. 00:00:01.938 Read the arriving response. 00:00:06.386 Start a new conversation. 00:00:08.914 Select the saved conversation. Final visible result: Hello Hi — how can I help you today? THREADS Thread 1 + New Thread