fix(rbac): sales/operational roles see deal alerts; quiet admin-only onboarding probe

UAT findings from the Sales-role functional walkthrough:

F1 — The deal-alert feed (stale interest, hot-lead-silent, EOI unsigned,
signer overdue, reservation-needs-agreement, berth stalled, expense dupes)
was gated on admin.view_audit_log, so salespeople got a 403 on the Alerts
inbox. None of the 9 alert rules are audit/security signals — they're all
operational — so re-gate the list route to interests.view (sales, director,
viewer get it; external residential partners don't) and hide the Alerts
section in the inbox for users without it instead of letting the query 403.

F2 — Non-admins triggered /api/v1/admin/onboarding/status (admin-only) and
ate a 403 in the console. Make useOnboardingStatus strictly opt-in
(enabled: opts.enabled === true) so a transient/stale isSuperAdmin during
permission hydration can't fire the privileged request.

1664 vitest pass; tsc + eslint clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/api/v1/alerts/route.ts

@@ -5,11 +5,13 @@ import { listAlertsForPort } from '@/lib/services/alerts.service';
 
 type AlertStatus = 'open' | 'dismissed' | 'resolved';
 
-// Tier-4 (authz-auditor): alerts include permission_denied + audit-adjacent
-// signals. Gated on admin.view_audit_log - same permission the audit log
-// page uses.
+// The alert feed is entirely operational/deal signals (stale interest, hot lead
+// silent, EOI unsigned, signer overdue, reservation needs agreement, berth
+// stalled, duplicate/unscanned expense) — there are no audit/security alert
+// rules. Gated on interests.view so the operational roles that act on these
+// (sales, director, viewer) see them; external residential partners don't.
 export const GET = withAuth(
-  withPermission('admin', 'view_audit_log', async (req: NextRequest, ctx) => {
+  withPermission('interests', 'view', async (req: NextRequest, ctx) => {
     const url = new URL(req.url);
     const status = (url.searchParams.get('status') ?? 'open') as AlertStatus;