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7e96bb51d2
QSaveFile writes a new file, forces it to disk and renames it over the old one, but does not force the folder to disk. On ext4 or XFS a power cut soon after a save can then lose the rename: the previous file comes back, or none. QET::syncFolderOf() now syncs the folder after every project, symbol and title block save (QET::writeXmlText()) and every .qetz save (QetZip::write()). Nothing to do on Windows. --resave and --set-titleblock wrote a .qet straight over the output file (QFile, truncate, write): a run stopped part-way left half a project. They now write through QET::writeXmlText() like the GUI's save. On Windows their .qet now has LF line ends, as the GUI writes. Checked with strace on --resave: fdatasync of the new file, linkat into place, fsync of the folder. The .qet written is byte-identical to before. ctest 106/106. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>