All fetch() POSTs now send application/x-www-form-urlencoded with the
page-injected csrf_token, satisfying unRAID's auto_prepend CSRF check.
All PHP API handlers switched from php://input JSON to $_POST.
Also adds Dry Run button (orange, between Run and Log) that sets
DRY_RUN=1 in the script environment before executing.
- Run button (blue) fires script immediately, opens log panel;
stamps log with manual run timestamp before exec
- Save moved to card footer — one button saves all cron expressions
for the orchestrator and all its children at once
- Toggle still auto-saves immediately on flip (enable/disable is instant)
- Removed onblur from cron inputs — cron only saves on explicit Save
- api/run.php: validates id, appends timestamp, execs script in background