feat(referrals): add referral attribution and daily login rewards

- Track referral attribution at registration via ?ref code with
  same-IP and duplicate-pair guards
- Add daily login rewards with streak tracking, claim flow and
  sendCurrency payout backed by RCON with DB fallback
- Add admin pages for referral settings and the daily reward schedule
- Add migration 0033 with tables, seed schedule, settings and ACL grants
- Add admin.referrals.* and admin.dailyrewards.* permission slugs
- Localize new copy in en, nl and it

src/lib/permission-slugs.ts

@@ -48,6 +48,12 @@ export const PERMS = {
 	// ── Polls Module ──
 	POLLS_VIEW: "admin.polls.view",
 	POLLS_EDIT: "admin.polls.edit",
+	// ── Referrals Module ──
+	REFERRALS_VIEW: "admin.referrals.view",
+	REFERRALS_EDIT: "admin.referrals.edit",
+	// ── Daily Login Rewards Module ──
+	DAILY_REWARDS_VIEW: "admin.dailyrewards.view",
+	DAILY_REWARDS_EDIT: "admin.dailyrewards.edit",
 	// ── Notifications Module ──
 	NOTIFICATIONS_VIEW: "admin.notifications.view",
 	NOTIFICATIONS_EDIT: "admin.notifications.edit",