Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

src/app/admin/rooms/[id]/furni/page.tsx

@@ -0,0 +1,84 @@
+import { redirect } from 'next/navigation'
+import { AdminBreadcrumb } from '@/components/admin/admin-breadcrumb'
+import { canAccess, getAdminContext, PERMS } from '@/lib/permissions'
+import { prisma } from '@/lib/prisma'
+import { loadRoom } from '../../_lib/load-room'
+import { FurniClient } from './furni-client'
+
+export default async function RoomFurniPage({
+  params,
+}: {
+  params: Promise<{ id: string; locale: string }>
+}) {
+  const { id } = await params
+  const { session, permissions } = await getAdminContext()
+  if (!canAccess(permissions, PERMS.ROOMS_VIEW, session.user.rank)) redirect('/admin')
+
+  const room = await loadRoom(id)
+
+  // Load items in this room. items.item_id → items_base.id
+  const items = await prisma.item.findMany({
+    where: { roomId: room.id },
+    orderBy: { id: 'desc' },
+  })
+
+  // Resolve item bases
+  const baseIds = Array.from(new Set(items.map((i) => i.itemId)))
+  const bases = baseIds.length
+    ? await prisma.itemsBase.findMany({
+        where: { id: { in: baseIds } },
+        select: { id: true, itemName: true, publicName: true, type: true },
+      })
+    : []
+  const baseMap = new Map(bases.map((b) => [b.id, b]))
+
+  // Resolve owner usernames
+  const userIds = Array.from(new Set(items.map((i) => i.userId).filter((u) => u > 0)))
+  const users = userIds.length
+    ? await prisma.user.findMany({
+        where: { id: { in: userIds } },
+        select: { id: true, username: true },
+      })
+    : []
+  const userMap = new Map(users.map((u) => [u.id, u.username]))
+
+  const rows = items.map((i) => {
+    const base = baseMap.get(i.itemId)
+    return {
+      id: i.id,
+      baseId: i.itemId,
+      name: base?.publicName || base?.itemName || `#${i.itemId}`,
+      itemName: base?.itemName ?? '',
+      type: base?.type ?? '?',
+      x: i.x,
+      y: i.y,
+      z: i.z,
+      rot: i.rot,
+      wallPos: i.wallPos,
+      userId: i.userId,
+      ownerUsername: userMap.get(i.userId) ?? null,
+      extraData: i.extraData,
+    }
+  })
+
+  return (
+    <div className="space-y-6">
+      <AdminBreadcrumb
+        items={[
+          { label: 'Rooms', href: '/admin/rooms' },
+          { label: room.name, href: `/admin/rooms/show/${room.id}` },
+          { label: 'Furniture' },
+        ]}
+      />
+      <FurniClient
+        room={{
+          id: room.id,
+          name: room.name,
+          ownerUsername: room.owner?.username ?? room.owner_name,
+        }}
+        items={rows}
+        canEdit={session.user.rank >= 4}
+      />
+    </div>
+  )
+}