Three fixes:
1. Config Checkpoints submenu replaced with a proper dialog. Lists
checkpoints with timestamp/size/filename, has a "Take Checkpoint
Now" button, and a "Roll Back" button that becomes enabled when a
row is selected. The previous click-a-menu-entry-immediate-restore
flow was too easy to fire by accident.
2. New CheckpointScheduler BackgroundService creates a checkpoint at
midnight every day. Combined with the existing auto-on-save
snapshots, this guarantees a daily rollback point even if the
config wasn't edited that day. A new "create-checkpoint" admin op
plus AdminPipeServer.CreateCheckpoint helper does the actual file
copy; both manual (via the dialog) and the scheduler use it.
3. Installer: drop the post-install "Launch Webhook Server" wizard
step. It tried to launch the GUI un-elevated, which fails because
the GUI's manifest is requireAdministrator. The Start Menu shortcut
handles elevation correctly, so the user can launch from there.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
justin
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