All configuration is now done exclusively through mimi_secrets.h at build time.
Removed NVS read/write logic, CLI config commands (wifi_set, set_tg_token,
set_api_key, set_model, set_proxy, clear_proxy, set_search_key), and setter
functions from all modules. CLI retains debug/maintenance commands only.
Updated all documentation to reflect the change.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
STA mode, reads SSID/password from NVS, exponential backoff
reconnect (1s-30s), EventGroup for connection state.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
