Release 26.07

Automated release created for tag 26.07

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Changelog

• Fix config and exclude-list files created during a snapshot being
  root-owned and uneditable by the regular user.
• Fix the snapshot process failing when a cleanup path contains spaces.
• Fix logging being silently lost after the output display is closed
  during a snapshot operation.
• Fix misleading disk-space warnings when an exclude pattern resolves
  to the root directory.
• Add --nvidia CLI flag to iso-snapshot-cli, which adds the
  xorg=nvidia boot option for NVIDIA hardware.
• Harden command execution: file names and boot options are passed as
  arguments instead of embedded in shell commands, preventing injection.
• Improve log archiving: each run captures only its own log and uses
  secure directories.
• Fix the application exiting when the user cancels the administrator
  authentication dialog; it now returns to the settings page so the
  snapshot can be started again.
• Skip the startup cleanup helpers when there is no leftover state
  from a previous interrupted run.
• Require administrator authentication for writing the live-files
  version/lsb-release templates, closing a passwordless path to
  tampering with distro metadata baked into future snapshots.
• Fix a denied re-authentication going unnoticed when the work
  directory needed to be relocated for space, or when consecutive
  privileged steps ran back-to-back after a cancelled prompt.
• Fix the privileged helper's own internal errors (unknown or missing
  command) being mistaken for a cancelled authentication.