@Rekoo-PS asked for an admin-level switch so new events can have Guest
Feedback enabled out of the box instead of toggling it on every time.
Mirrors the existing event_default_require_password pattern (#317) —
same shape end-to-end, same set of five files.
- publicSettings.js: whitelist + expose event_default_feedback_enabled
(defaults to false to match the prior hard-coded form default; no
behaviour change for existing installs until an admin flips it).
- adminEvents.js: rename `feedback_enabled = false` destructure to
`feedback_enabled: feedbackEnabledInput` so we can distinguish
"omitted" from "explicit false", then resolve the default from the
setting only when the caller omitted it — identical to the
require_password handling a few lines above.
- Frontend EventSettings type + state + loader: new boolean,
default false.
- EventsTab: toggle UI right under "Require password by default".
- CreateEventPage: one-shot useEffect that seeds
feedback_settings.feedback_enabled from the public setting on first
load (mirrors the require_password seed effect right above it).
Sub-toggles (likes / ratings / comments) keep their hard-coded
true defaults so flipping the master setting immediately gives
sensible behaviour without a second admin setting to manage.
Refs: #520