feat(protocol): 添加传输状态事件管理协议会话状态

添加了新的 proto_transport_state_event 事件类型来跟踪协议传输连接状态，
包括链接断开和就绪状态。为 BLE NUS 和 USB CDC 模块实现了状态机管理，
替换原有的简单布尔标志，提供更精确的连接状态跟踪。

- 添加 proto_transport_state_event 事件定义和实现
- 为 BLE NUS 模块引入业务状态机管理
- 为 USB CDC 模块引入业务状态机管理
- 实现协议模块中的会话状态管理
- 移除 protocol_module_reset_transport_state 函数
- 更新 CMakeLists.txt 包含新事件源文件

inc/events/proto_common.h

@@ -11,6 +11,11 @@ enum proto_transport {
 	PROTO_TRANSPORT_COUNT,
 };
 
+enum proto_transport_link_state {
+	PROTO_TRANSPORT_LINK_DOWN = 0,
+	PROTO_TRANSPORT_LINK_READY,
+};
+
 #ifdef __cplusplus
 }
 #endif

inc/events/proto_transport_state_event.h

@@ -0,0 +1,36 @@
+#ifndef BLINKY_PROTO_TRANSPORT_STATE_EVENT_H_
+#define BLINKY_PROTO_TRANSPORT_STATE_EVENT_H_
+
+#include <app_event_manager.h>
+#include <app_event_manager_profiler_tracer.h>
+
+#include "proto_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct proto_transport_state_event {
+	struct app_event_header header;
+	enum proto_transport transport;
+	enum proto_transport_link_state state;
+};
+
+APP_EVENT_TYPE_DECLARE(proto_transport_state_event);
+
+static inline void submit_proto_transport_state_event(
+	enum proto_transport transport, enum proto_transport_link_state state)
+{
+	struct proto_transport_state_event *event =
+		new_proto_transport_state_event();
+
+	event->transport = transport;
+	event->state = state;
+	APP_EVENT_SUBMIT(event);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_PROTO_TRANSPORT_STATE_EVENT_H_ */

inc/events/usb_control_event.h

@@ -0,0 +1,71 @@
+#ifndef BLINKY_USB_CONTROL_EVENT_H_
+#define BLINKY_USB_CONTROL_EVENT_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <app_event_manager.h>
+#include <app_event_manager_profiler_tracer.h>
+#include <zephyr/device.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum usb_control_event_type {
+	USB_CONTROL_EVENT_CDC_LINE_STATE = 0,
+	USB_CONTROL_EVENT_CDC_LINE_CODING,
+};
+
+struct usb_control_event {
+	struct app_event_header header;
+	enum usb_control_event_type type;
+	const struct device *dev;
+	union {
+		struct {
+			bool dtr;
+		} cdc_line_state;
+		struct {
+			uint32_t baudrate;
+			uint8_t data_bits;
+			uint8_t stop_bits;
+			uint8_t parity;
+			uint8_t flow_ctrl;
+		} cdc_line_coding;
+	} data;
+};
+
+APP_EVENT_TYPE_DECLARE(usb_control_event);
+
+static inline void submit_usb_control_cdc_line_state_event(
+	const struct device *dev, bool dtr)
+{
+	struct usb_control_event *event = new_usb_control_event();
+
+	event->type = USB_CONTROL_EVENT_CDC_LINE_STATE;
+	event->dev = dev;
+	event->data.cdc_line_state.dtr = dtr;
+	APP_EVENT_SUBMIT(event);
+}
+
+static inline void submit_usb_control_cdc_line_coding_event(
+	const struct device *dev, uint32_t baudrate, uint8_t data_bits,
+	uint8_t stop_bits, uint8_t parity, uint8_t flow_ctrl)
+{
+	struct usb_control_event *event = new_usb_control_event();
+
+	event->type = USB_CONTROL_EVENT_CDC_LINE_CODING;
+	event->dev = dev;
+	event->data.cdc_line_coding.baudrate = baudrate;
+	event->data.cdc_line_coding.data_bits = data_bits;
+	event->data.cdc_line_coding.stop_bits = stop_bits;
+	event->data.cdc_line_coding.parity = parity;
+	event->data.cdc_line_coding.flow_ctrl = flow_ctrl;
+	APP_EVENT_SUBMIT(event);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_USB_CONTROL_EVENT_H_ */

inc/protocol_module.h

@@ -18,8 +18,6 @@ int protocol_module_process_message(enum proto_transport transport,
 				    size_t rsp_payload_buf_size,
 				    size_t *rsp_payload_len);
 
-void protocol_module_reset_transport_state(enum proto_transport transport);
-
 #ifdef __cplusplus
 }
 #endif