NSIS:
- Back up unknown top-level install subdirs (e.g. <installdir>\decks),
not just loose deck files, so the 3.1.1 -> new upgrade no longer loses
data folders the old RMDir /r deletes before the client ever runs.
Payload dirs (plugins/translations/sounds/themes) stay in place to avoid
restoring stale DLLs; restore + relocate handle the new backup set and
the one-time notice covers both decks and folders.
- Restart the %TEMP% backup when the 32/64-bit passes point at different
dirs instead of merging (which restored one dir's files into the other);
document that only the last pass relocates and the %TEMP% copy is not
a durable second copy.
Client:
- Drop the portable at-risk warning: portable installs never shipped an
uninstaller and portable updates preserve data/, so every portable user
got a spurious dialog plus daily host-machine copies.
- AtRiskDataWarning is now a plain class with Q_DECLARE_TR_FUNCTIONS
instead of QObject+Q_OBJECT; logging category renamed to
at_risk_data_warning; MainWindow wrapper inlined into startupConfigCheck.
- Lower the synchronous startup backup cap 500 -> 200 MB.
Utility/tests:
- Remove test-only backupAtRiskPath()/findRecentBackupSession() and the
no-marker/no-manifest legacy paths; isBackupSessionComplete() now
requires the complete marker; tests updated to the plural API.
