ROOT CAUSE of the WebUI-dir misownership on rooted->rootless:
check_install_type.sh sets the lowercase $docker_install_user to the MANAGER
user in rooted mode (it's a mode-dependent 'container owner' var). reconcile
trusted it, so mid-switch it held the stale rooted value (=manager) and chowned
the rootless WebUI dir to libreportal -> WebUI Exited(137) -> dockerStartAllApps
retried forever (the 'switch hangs' symptom). Now read CFG_DOCKER_INSTALL_USER
straight from the live config file (authoritative, never polluted), falling back
to the CFG var then a hard default.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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