생산용 BLE write 명령 잠금 추가

- serial number / HW version / passkey write 명령 해당
- production_done NVS 플래그 추가
- 기존 passkey_changed 플래그 제거
- production_done=0 상태에서만 Serial/HW/Passkey Write 허용
- production_done=1 상태에서는 생산용 Write 명령을 rxd 응답으로 차단
- msr 본딩 삭제 성공 시 production_done=1 저장

src/command/handlers/cmd_info.c

@@ -11,6 +11,19 @@
 #include "app_nvs.h"
 #include "cmd_info.h"
 
+/* Production Mode - Serial Number, HW Version, Passkey write command lock */
+static bool cmd_info_write_locked(const char *cmd_tag)
+{
+    if (m_production_done == 0U)
+    {
+        return false;
+    }
+
+    cmd_send_response_tag_echo("rxd:", cmd_tag);
+    DBG_PRINTF("[CMD] production write disabled: %s\r\n", cmd_tag);
+    return true;
+}
+
 /*
  * mfv: firmware version read
  */
@@ -54,6 +67,11 @@ int cmd_mid(const uint8_t *data, uint8_t data_len)
  */
 int cmd_mwh(const uint8_t *data, uint8_t data_len)
 {
+    if (cmd_info_write_locked("mwh?"))
+    {
+        return 1;
+    }
+
     if (data_len < HW_NO_LENGTH)
     {
         cmd_send_response_u16("rwh:", 0xFFFF);
@@ -96,6 +114,11 @@ int cmd_mrh(const uint8_t *data, uint8_t data_len)
  */
 int cmd_mws(const uint8_t *data, uint8_t data_len)
 {
+    if (cmd_info_write_locked("mws?"))
+    {
+        return 1;
+    }
+
     if (data_len < SERIAL_NO_LENGTH)
     {
         cmd_send_response_u16("rws:", 0xFFFF);
@@ -138,19 +161,17 @@ int cmd_mrs(const uint8_t *data, uint8_t data_len)
  */
 int cmd_mpz(const uint8_t *data, uint8_t data_len)
 {
+    if (cmd_info_write_locked("mpz?"))
+    {
+        return 1;
+    }
+
     if (data_len < PASSKEY_LENGTH)
     {
         cmd_send_response_u16("rpz:", 0xFFFF);
         return 1;
     }
 
-    if (m_passkey_changed != 0U)
-    {
-        // 패스키가 변경된 경우 다시 바꿀 수 없음(FFFF 반환)
-        cmd_send_response_u16("rpz:", 0xFFFF);
-        DBG_PRINTF("[CMD] mpz: passkey already changed\r\n");
-        return 1;
-    }
 
     // NVS 저장이 모두 성공한 뒤 RAM 값 확정
     char new_passkey[PASSKEY_BUF_SIZE];
@@ -164,17 +185,9 @@ int cmd_mpz(const uint8_t *data, uint8_t data_len)
         return 1;
     }
 
-    // 변경 완료 플래그 세트 : 다음 mpz? 명령 차단
-    err = app_nvs_save_passkey_changed(1U);
-    if (err)
-    {
-        cmd_send_response_u16("rpz:", 0xFFFD);
-        return 1;
-    }
 
     memset(m_static_passkey, 0, sizeof(m_static_passkey));
     memcpy(m_static_passkey, new_passkey, PASSKEY_LENGTH);
-    m_passkey_changed = 1U;
 
     cmd_send_response_ascii("rpz:", m_static_passkey, PASSKEY_LENGTH);
     return 1;