reset_to_defaults() previously only cleared the runtime_config dict and
saved config_runtime.yaml, but never touched the actual globals that
control runtime behavior. After a reset, LANGUAGE_MODE, AUTONOMOUS_DEBUG,
VOICE_DEBUG_MODE, USE_CHESHIRE_CAT, PREFER_AMD_GPU, and DM_MOOD all kept
their current in-memory values until the next restart.
Now reset_to_defaults() also resets the corresponding globals to their
default values from CONFIG (the static config loaded from config.yaml).
Both full reset and single-key reset are supported. The default values
come from the Pydantic AppConfig schema, ensuring consistency.
Tested: set non-default values, full reset -> all back to defaults,
single-key reset -> only that key back to default, runtime_state property
reflects the reset immediately.
koko210Serve
7c9cf0d8b4