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)/admin/page.tsx

@@ -5,6 +5,7 @@ import { redirect } from 'next/navigation'
 import { createClient } from '@/lib/supabase/server'
 import { UserManager, type AdminUser, type SiteOption } from '@/components/admin/user-manager'
 import { SiteZoneManager, type SiteWithZones } from '@/components/admin/site-zone-manager'
+import { TruckManager, type Truck } from '@/components/admin/truck-manager'
 
 export default async function AdminHome() {
   const supabase = await createClient()
@@ -15,7 +16,7 @@ export default async function AdminHome() {
     .from('users').select('role').eq('id', user.id).single()
   if (!profile || profile.role !== 'admin') redirect('/login')
 
-  const [{ data: users }, { data: sites }] = await Promise.all([
+  const [{ data: users }, { data: sites }, { data: trucks }] = await Promise.all([
     supabase
       .from('users')
       .select('id, name, email, role, department, site_id, active')
@@ -24,6 +25,10 @@ export default async function AdminHome() {
       .from('sites')
       .select('id, name, address, zones (id, name, qr_code_token)')
       .order('name'),
+    supabase
+      .from('trucks')
+      .select('id, truck_no, carrier, active')
+      .order('truck_no'),
   ])
 
   const siteOptions: SiteOption[] = (sites ?? []).map(s => ({ id: s.id, name: s.name }))
@@ -41,6 +46,7 @@ export default async function AdminHome() {
       </div>
       <UserManager users={(users ?? []) as AdminUser[]} sites={siteOptions} />
       <SiteZoneManager sites={(sites ?? []) as unknown as SiteWithZones[]} />
+      <TruckManager trucks={(trucks ?? []) as Truck[]} />
     </main>
   )
 }