docs: simplify pairing confirm, auto-detect sensor type and select suffix only

Docs/60_coding/mod-key.md

@@ -79,74 +79,51 @@ void Key_Scan_Process(void) {
 }
 ```
 
-### 2.2 事件异步处理与分发 (Process_System_Event 示例)
+### 2.2 事件解调与微调分配分发 (Process_System_Event 示例)
 在主循环事件分发中，对各个状态下的事件进行处理：
 ```c
 void Process_System_Event(KeyEvent evt) {
     switch (current_state) {
         case STATE_MENU:
             if (evt == KEY_UP_SHORT) {
-                // 菜单滚动
                 if (menu_index > 0) menu_index--;
                 Redraw = 1;
             } else if (evt == KEY_DOWN_SHORT) {
                 if (menu_index < 3) menu_index++;
                 Redraw = 1;
             } else if (evt == KEY_CONFIRM_CLICK) {
-                // 点击确认进入选中分支
                 Enter_Menu_Branch(menu_index);
             } else if (evt == KEY_CONFIRM_LONG) {
-                // 长按 3 秒退出菜单返回时钟待机
                 current_state = STATE_CLOCK;
                 Redraw = 1;
             }
             break;
             
         case STATE_PAIR_CONFIRM:
-            if (confirm_edit_focus == 0) {
-                // 第一步：编辑传感器类型
-                if (evt == KEY_UP_SHORT) {
-                    if (selected_type < 6) selected_type++;
-                    else selected_type = 0;
-                    Redraw = 1;
-                } else if (evt == KEY_DOWN_SHORT) {
-                    if (selected_type > 0) selected_type--;
-                    else selected_type = 6;
-                    Redraw = 1;
-                } else if (evt == KEY_CONFIRM_CLICK) {
-                    // 点击确认，锁定类型，跳入第二步选择序号
-                    confirm_edit_focus = 1;
-                    Redraw = 1;
-                }
-            } else if (confirm_edit_focus == 1) {
-                // 第二步：编辑序号后缀
-                if (evt == KEY_UP_SHORT) {
-                    if (selected_suffix < 99) selected_suffix++;
-                    Redraw = 1;
-                } else if (evt == KEY_DOWN_SHORT) {
-                    if (selected_suffix > 1) selected_suffix--;
-                    Redraw = 1;
-                } else if (evt == KEY_CONFIRM_CLICK) {
-                    // 点击确认，完成最终写入保存，返回时钟
-                    Add_Sensor(captured_addr, selected_type, selected_suffix);
-                    current_state = STATE_CLOCK;
-                    Redraw = 1;
-                }
-            }
-            // 长按 CONFIRM 3 秒退出不保存
-            if (evt == KEY_CONFIRM_LONG) {
+            // 直接进行后缀序号微调 (传感器类型已由射频数据码自动识别并锁定)
+            if (evt == KEY_UP_SHORT) {
+                if (selected_suffix < 99) selected_suffix++;
+                Redraw = 1;
+            } else if (evt == KEY_DOWN_SHORT) {
+                if (selected_suffix > 1) selected_suffix--;
+                Redraw = 1;
+            } else if (evt == KEY_CONFIRM_CLICK) {
+                // 点击 CONFIRM，直接将自动解析的类型和调整好的序号写入数据库
+                Add_Sensor(captured_addr, auto_detected_type, selected_suffix);
+                current_state = STATE_CLOCK;
+                Redraw = 1;
+            } else if (evt == KEY_CONFIRM_LONG) {
+                // 长按 3 秒放弃保存返回时钟
                 current_state = STATE_CLOCK;
                 Redraw = 1;
             }
             break;
 
         case STATE_IPC_BIND:
-            // IPC 绑定连发状态中支持物理长按退出
             if (evt == KEY_CONFIRM_LONG || evt == KEY_DOWN_LONG) {
                 current_state = STATE_CLOCK;
                 Redraw = 1;
             } else if (evt == KEY_CONFIRM_CLICK) {
-                // 重发绑定信号
                 EV1527_Transmit(bracelet_factory_id, 0x01);
             }
             break;