fix: add ComponentLoader for @adminjs/upload v4 compatibility

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

admin.mjs

@@ -1,4 +1,4 @@
-import AdminJS from 'adminjs'
+import AdminJS, { ComponentLoader } from 'adminjs'
 import AdminJSFastify from '@adminjs/fastify'
 import { Database, Resource, getModelByName } from '@adminjs/prisma'
 import uploadFeature from '@adminjs/upload'
@@ -10,6 +10,8 @@ import { prisma } from './src/lib/db.mjs'
 
 AdminJS.registerAdapter({ Database, Resource })
 
+const componentLoader = new ComponentLoader()
+
 const stripe = process.env.STRIPE_SECRET_KEY
   ? new Stripe(process.env.STRIPE_SECRET_KEY)
   : null
@@ -183,6 +185,7 @@ async function autoComputeFields(response) {
 export async function setupAdmin(app) {
   const admin = new AdminJS({
     rootPath: '/admin',
+    componentLoader,
     resources: [
       {
         resource: { model: getModelByName('Product'), client: prisma },
@@ -242,6 +245,7 @@ export async function setupAdmin(app) {
         },
         features: [
           uploadFeature({
+            componentLoader,
             provider: {
               local: { bucket: UPLOADS_DIR },
             },