Add staff-only UI routes for creating/editing the default GlobalConfig
and creating the first HostConfig from the dashboard.
Improve the empty dashboard state so a fresh database guides the user
towards the next useful setup action instead of only showing empty tables.
Cover the setup flow with view tests for empty state prompts, global
config creation, and host creation.
Add a staff-only Django form for editing operational host settings while keeping
host identity stable. Support address, enablement, SSH/source overrides,
include/exclude lists, rsync extra args, and retention settings using the same
SQL-backed HostConfig model consumed by backup and scheduler flows.
Parse newline-separated list fields into JSON lists, preserve nullable
excludes_replace semantics, and cover rendering plus update behavior with view
tests.
Add a staff-only Django form for creating and updating host schedules using the
SQL-backed ScheduleConfig model. Link the form from host detail pages, validate
cron expressions with the existing scheduler parser, and preserve scheduler/CLI
behavior by writing to the same source of truth.
Cover default rendering, schedule creation, updates, and invalid cron handling
with view tests.
