On ESP IDF 5.5 the get_current_time tool returns ESP_ERR_NOT_FOUND because
there is no "Date" header. This is because esp_http_client_get_header
only reads request headers. Response headers are only available via the
HTTP_EVENT_ON_HEADER event callback. They're dispatched and freed as they're
parsed.
Register an event handler that captures the "Date" header during HTTP response
parsing. The date string from this header is available as part of user context
after the HTTP request is finished.
- Remove unused context_build_messages() (superseded by direct cJSON in agent_loop)
- Remove unused llm_chat() and its helper extract_text_* functions (superseded by llm_chat_tools)
- Remove ota_manager.c from build (never called)
- Remove config_screen.c stub from build (no-op module)
- Remove unused PWR_KEY_State, Button_GPIO_Get_Level; drop config_screen dependency from button_driver
- Fix incorrect type cast in tool_get_time.c (char[64] cast to char**)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Fetches real time via HTTP Date header (works through proxy),
sets system clock, and returns formatted local time to the agent.
Also adds MIMI_TIMEZONE config and updates default model to claude-opus-4-5.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
