feat: transport incidents with truck number support

- DB: trucks table + incidents.truck_id FK + transport enum value
- Validation: transport type requires truck_id
- Create API: validates truck exists/active, persists truck_id
- Report form: truck dropdown shown when type=transport (required)
- Admin: TruckManager CRUD + /api/admin/trucks route
- Detail: trucks join surfaced in incident-detail + detail page query
- Inbox (HSE + supervisor): truck filter, transport in TYPE_OPTIONS,
  fixed stale enum values (dropped dangerous_occurrence/mhe_asset/occupational_disease)
- List: transport label + truck number badge in rows
- i18n: transport + truckLabel/truckPlaceholder in en/ms/zh

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CPf5Rc8QPx6V8KLEEgfKEQ

app/(protected)/supervisor/incidents/page.tsx

@@ -3,14 +3,14 @@ export const dynamic = 'force-dynamic'
 import { createClient } from '@/lib/supabase/server'
 import { IncidentList, type Incident } from '@/components/incidents/incident-list'
 import { Pagination } from '@/components/incidents/pagination'
-import { IncidentFilters, type SiteOption } from '@/components/incidents/incident-filters'
+import { IncidentFilters, type SiteOption, type TruckOption } from '@/components/incidents/incident-filters'
 
 const PAGE_SIZE = 25
 
 export default async function SupervisorInboxPage({
   searchParams,
 }: {
-  searchParams: Promise<{ page?: string; q?: string; status?: string; type?: string; site_id?: string }>
+  searchParams: Promise<{ page?: string; q?: string; status?: string; type?: string; site_id?: string; truck_id?: string }>
 }) {
   const supabase = await createClient()
   const params = await searchParams
@@ -23,6 +23,7 @@ export default async function SupervisorInboxPage({
       id, reference_no, incident_type, status, severity, reported_at,
       sites (name),
       zones (name),
+      trucks (truck_no),
       reporter:users!reported_by (name)
     `, { count: 'exact' })
     .order('reported_at', { ascending: false })
@@ -33,13 +34,16 @@ export default async function SupervisorInboxPage({
   if (params.status) query = query.eq('status', params.status)
   if (params.type) query = query.eq('incident_type', params.type)
   if (params.site_id) query = query.eq('site_id', params.site_id)
+  if (params.truck_id) query = query.eq('truck_id', params.truck_id)
 
-  const [{ data: incidents, count }, { data: sites }] = await Promise.all([
+  const [{ data: incidents, count }, { data: sites }, { data: trucks }] = await Promise.all([
     query.range(from, from + PAGE_SIZE - 1),
     supabase.from('sites').select('id, name').order('name'),
+    supabase.from('trucks').select('id, truck_no').eq('active', true).order('truck_no'),
   ])
 
   const siteOptions: SiteOption[] = (sites ?? []).map(s => ({ id: s.id, name: s.name }))
+  const truckOptions: TruckOption[] = (trucks ?? []).map(tk => ({ id: tk.id, truck_no: tk.truck_no }))
 
   return (
     <main className="max-w-4xl mx-auto px-4 py-6">
@@ -47,7 +51,7 @@ export default async function SupervisorInboxPage({
         <h1 className="text-2xl font-bold text-gray-900">Incident Inbox</h1>
         <span className="text-sm text-gray-500">{count ?? incidents?.length ?? 0} incidents</span>
       </div>
-      <IncidentFilters sites={siteOptions} />
+      <IncidentFilters sites={siteOptions} trucks={truckOptions} />
       <IncidentList incidents={(incidents ?? []) as unknown as Incident[]} basePath="/supervisor" />
       <Pagination page={page} pageSize={PAGE_SIZE} total={count ?? 0} href="/supervisor/incidents" />
     </main>