Two related changes to the contact detail page:
1. The "Flagged invalid" badge was wrapping to two lines on
narrow widths because the daisyUI badge has no explicit
no-wrap class. Add `whitespace-nowrap`, drop the redundant
capitalization on "Invalid", and append the flagger's
callsign so the badge reads "Flagged invalid by W5XYZ".
Hover tooltip carries the timestamp.
2. New `flagged_by_user_id` + `flagged_at` columns on contacts.
`Radio.toggle_flagged_invalid!/2` now takes the admin User
doing the flagging; on unflag it clears both fields so a
subsequent re-flag gets a fresh attribution and the badge
never shows a stale flagger.
3. `Radio.delete_contact!/1` + a Delete button next to Flag.
Admin-only, gated in both the event handler and the template.
Uses LV's `data-confirm` for the destructive-action prompt.
All FK references to `contacts` already declare
`on_delete: :delete_all` (terrain_profiles, contact_edits,
contact_common_volume_radar) so a single Repo.delete!
cascades cleanly.
Graham McIntire
fb503ed2e7