feat(dashboard): add moderation log page + message edit history
- Backend moderation module: GET /api/moderation/stats (per-status + failed rate)
+ GET /api/moderation/actions (filter by status/actionType, cursor paging),
joins messages for target username + content
- Message GET /api/messages/detail/:id now returns edit_count + edit_history
(old_content snapshots from message_edits, newest first)
- FE: new /moderation page — summary cards (total/executed/failed/pending +
failed-rate), status+type filter chips, timeline rows with action icon,
target user, reason, status badge, timestamps, error text
- FE: message detail shows 'Riwayat edit' panel with previous versions
asepharyana
f999be4fa0