First-build fixes (DDS members, Qt6 transitive WebChannel/PrintSupport drops, logger init, Qt5 guard); script: log_warn, BUILD_WLS default ON, Poppler image+APT, XmlPatterns 6.0 wording
First-build fixes (DDS members, Qt6 transitive WebChannel/PrintSupport drops, logger init, Qt5 guard); script: log_warn, BUILD_WLS default ON, Poppler image+APT, XmlPatterns 6.0 wording