Description: On X.com (web), Grok cannot display past conversation history; threads fail to load or remain blank. Steps: 1. Open Grok on X.com. 2. Navigate to conversation history. 3. Observe that messages do not render. Expected: History loads and displays previous messages. Actual: History view fails to load; shows empty/blank state. Environment: macOS (26.3 beta), Safari (26.3 (21623.2.2.11.1)), no custom CSS. https://github.com/user-attachments/assets/4a9bf451-3a71-4db0-9a3c-892608c9b89b