test(M00): 完善MQTT冒烟配置自检

scripts/dev/wsl/mqtt-smoke.env.example

@@ -14,4 +14,4 @@ QIPAI_MQTT_PASSWORD=
 # Optional. Leave blank to derive from the generated client id.
 QIPAI_MQTT_ALLOWED_PUBLISH_TOPIC=
 QIPAI_MQTT_ALLOWED_SUBSCRIBE_TOPIC=
-QIPAI_MQTT_DENIED_SUBSCRIBE_TOPIC=$SYS/#
+QIPAI_MQTT_DENIED_SUBSCRIBE_TOPIC='$SYS/#'

scripts/dev/wsl/mqtt-smoke.sh

@@ -20,17 +20,38 @@ denied_subscribe_topic="${QIPAI_MQTT_DENIED_SUBSCRIBE_TOPIC:-\$SYS/#}"
 
 echo "INFO: MQTT smoke target ${protocol}://${host}:${port}, version ${mqtt_version}, qos ${qos}"
 
+check_config_only=false
+if [ "${1:-}" = "--check-config" ]; then
+  check_config_only=true
+fi
+
 if ! command -v mqttx >/dev/null 2>&1; then
   echo "FAIL: mqttx CLI not found"
   exit 1
 fi
 
+if [ ! -f "${SCRIPT_DIR}/mqtt-smoke.env" ]; then
+  echo "WARN: local env not found: scripts/dev/wsl/mqtt-smoke.env"
+  echo "INFO: copy scripts/dev/wsl/mqtt-smoke.env.example and fill local credentials outside Git"
+fi
+
 if [ -z "${QIPAI_MQTT_USERNAME:-}" ] || [ -z "${QIPAI_MQTT_PASSWORD:-}" ]; then
   echo "SKIP: QIPAI_MQTT_USERNAME/QIPAI_MQTT_PASSWORD not configured in Git-ignored local env"
   echo "INFO: service-level check remains available via scripts/dev/wsl/check-local-mqtt.sh"
   exit 0
 fi
 
+if [ "$QIPAI_MQTT_PASSWORD" = "QIPAI_EXPECTED_BAD_PASSWORD" ]; then
+  echo "FAIL: local password equals the negative-test password placeholder"
+  exit 1
+fi
+
+if [ "$check_config_only" = true ]; then
+  echo "PASS: local MQTT smoke configuration is present"
+  echo "INFO: username configured; password is intentionally not printed"
+  exit 0
+fi
+
 common_args=(
   --hostname "$host"
   --port "$port"