feat(db): phase 4 group 6 — server component pages to Drizzle

Converts all 18 server component page files from Supabase client queries
to Drizzle ORM using asAdmin. Adds getSession() + redirect to the three
pages (hse/incidents, hse/incidents/[id], hse/dashboard) that lacked it.
Maps snake_case component prop shapes explicitly where required.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/(protected)/admin/page.tsx

@@ -2,8 +2,10 @@ export const dynamic = 'force-dynamic'
 
 import Link from 'next/link'
 import { redirect } from 'next/navigation'
-import { createClient } from '@/lib/supabase/server'
+import { asAdmin } from '@/lib/db/with-user'
 import { getSession } from '@/lib/auth/get-session'
+import { users, sites, zones, trucks } from '@/lib/db/schema'
+import { desc, asc } from 'drizzle-orm'
 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'
@@ -13,24 +15,51 @@ export default async function AdminHome() {
   if (!session) redirect('/login')
   if (session.role !== 'admin') redirect('/login')
 
-  const supabase = await createClient()
-
-  const [{ data: users }, { data: sites }, { data: trucks }] = await Promise.all([
-    supabase
-      .from('users')
-      .select('id, name, email, role, department, site_id, active')
-      .order('created_at', { ascending: false }),
-    supabase
-      .from('sites')
-      .select('id, name, address, active, zones (id, name, qr_code_token, active)')
-      .order('name'),
-    supabase
-      .from('trucks')
-      .select('id, truck_no, carrier, active')
-      .order('truck_no'),
+  const [userRows, siteRows, zoneRows, truckRows] = await Promise.all([
+    asAdmin(db => db.select({
+      id: users.id, name: users.name, email: users.email, role: users.role,
+      department: users.department, siteId: users.siteId, active: users.active,
+    }).from(users).orderBy(desc(users.createdAt))),
+    asAdmin(db => db.select({
+      id: sites.id, name: sites.name, address: sites.address, active: sites.active,
+    }).from(sites).orderBy(asc(sites.name))),
+    asAdmin(db => db.select({
+      id: zones.id, siteId: zones.siteId, name: zones.name,
+      qrCodeToken: zones.qrCodeToken, active: zones.active,
+    }).from(zones)),
+    asAdmin(db => db.select({
+      id: trucks.id, truckNo: trucks.truckNo, carrier: trucks.carrier, active: trucks.active,
+    }).from(trucks).orderBy(asc(trucks.truckNo))),
   ])
 
-  const siteOptions: SiteOption[] = (sites ?? []).map(s => ({ id: s.id, name: s.name }))
+  const adminUsers: AdminUser[] = userRows.map(u => ({
+    id: u.id,
+    name: u.name,
+    email: u.email,
+    role: u.role,
+    department: u.department ?? null,
+    site_id: u.siteId ?? null,
+    active: u.active,
+  }))
+
+  const sitesWithZones: SiteWithZones[] = siteRows.map(s => ({
+    id: s.id,
+    name: s.name,
+    address: s.address ?? null,
+    active: s.active,
+    zones: zoneRows
+      .filter(z => z.siteId === s.id)
+      .map(z => ({ id: z.id, name: z.name, qr_code_token: z.qrCodeToken, active: z.active })),
+  }))
+
+  const siteOptions: SiteOption[] = siteRows.map(s => ({ id: s.id, name: s.name }))
+
+  const truckList: Truck[] = truckRows.map(t => ({
+    id: t.id,
+    truck_no: t.truckNo,
+    carrier: t.carrier ?? null,
+    active: t.active,
+  }))
 
   return (
     <main className="max-w-4xl mx-auto px-4 py-6 space-y-6">
@@ -43,9 +72,9 @@ export default async function AdminHome() {
           <Link href="/management" className="text-blue-600 hover:underline">Management</Link>
         </nav>
       </div>
-      <UserManager users={(users ?? []) as AdminUser[]} sites={siteOptions} />
-      <SiteZoneManager sites={(sites ?? []) as unknown as SiteWithZones[]} />
-      <TruckManager trucks={(trucks ?? []) as Truck[]} />
+      <UserManager users={adminUsers} sites={siteOptions} />
+      <SiteZoneManager sites={sitesWithZones} />
+      <TruckManager trucks={truckList} />
     </main>
   )
 }