feat(voice): add on-device Miao Zhang Gui wake word

Add an optional local wake response prompt configuration. The prompt asset is intentionally not included yet.

components/domain/include/domain.h

@@ -66,6 +66,34 @@ typedef esp_err_t (*domain_multimodal_audio_uplink_cb_t)(
         size_t len,
         void *user_data);
 
+typedef enum {
+    DOMAIN_LOCAL_COMMAND_MIAO_ZHANG_GUI = 1,
+} domain_local_command_id_t;
+
+typedef enum {
+    DOMAIN_LOCAL_COMMAND_EVENT_DETECTED = 0,
+} domain_local_command_event_type_t;
+
+typedef struct {
+    domain_local_command_event_type_t type;
+    domain_local_command_id_t command_id;
+    uint32_t confidence_x10000;
+    uint32_t detection_generation;
+} domain_local_command_event_t;
+
+typedef void (*domain_local_command_event_callback_t)(
+        const domain_local_command_event_t *event,
+        void *user_data);
+
+typedef struct {
+    bool started;
+    bool detection_running;
+    uint32_t detection_generation;
+    uint32_t detection_count;
+    uint32_t dropped_pcm_frames;
+    uint32_t task_stack_high_water_bytes;
+} domain_local_command_snapshot_t;
+
 typedef enum {
     DOMAIN_MULTIMODAL_DOWNSTREAM_PLAYBACK_STARTED = 0,
     DOMAIN_MULTIMODAL_DOWNSTREAM_PLAYBACK_COMPLETED,
@@ -180,6 +208,20 @@ esp_err_t domain_runtime_multimodal_audio_start_uplink(
 esp_err_t domain_runtime_multimodal_audio_stop_uplink(int timeout_ms);
 bool domain_runtime_multimodal_audio_is_uplink_running(void);
 bool domain_runtime_multimodal_audio_is_initialized(void);
+/**
+ * @brief Start local MultiNet detection for the Chinese phrase "喵掌柜".
+ *
+ * The callback runs in the domain inference task and must be bounded and
+ * non-blocking. Repeated start with the same callback is idempotent.
+ */
+esp_err_t domain_runtime_local_command_start(
+        domain_local_command_event_callback_t callback,
+        void *user_data);
+esp_err_t domain_runtime_local_command_suspend(int timeout_ms);
+esp_err_t domain_runtime_local_command_resume(int timeout_ms);
+esp_err_t domain_runtime_local_command_stop(int timeout_ms);
+esp_err_t domain_runtime_local_command_get_snapshot(
+        domain_local_command_snapshot_t *out_snapshot);
 esp_err_t domain_runtime_multimodal_audio_play_downstream_opus(const uint8_t *data, size_t len);
 esp_err_t domain_runtime_multimodal_audio_begin_downstream_response(void);
 esp_err_t domain_runtime_multimodal_audio_finish_downstream_response(void);