feat: email notifications via Resend on new incident

app/api/incidents/route.ts

@@ -2,6 +2,7 @@ import { NextResponse } from 'next/server'
 import { createClient } from '@/lib/supabase/server'
 import { validateIncidentInput } from '@/lib/incidents/validate'
 import { uploadEvidenceFile, type EvidenceStage } from '@/lib/supabase/storage'
+import { sendNewIncidentEmail } from '@/lib/notifications/email'
 
 export const dynamic = 'force-dynamic'
 
@@ -105,5 +106,8 @@ export async function POST(request: Request) {
     p_new_value: { incident_type: input.incident_type, reported_by: user.id },
   })
 
+  sendNewIncidentEmail(incident.id, zone.site_id, incident.reference_no ?? '', input.incident_type)
+    .catch(err => console.error('email notification failed:', err))
+
   return NextResponse.json({ id: incident.id, reference_no: incident.reference_no }, { status: 201 })
 }