The Flatpak autoprovisioning command does not reliably write credentials
to KWallet from inside the sandbox. After provisioning, directly write
both KWallet entries (user:url/:0 and user_app-password:url/:0) via
qdbus, creating the Nextcloud folder first if needed. kwallet-query was
tried but silently returns 0 without creating missing folders.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>