feat(media): support local and s3 upload providers

apps/admin/src/app/api/media/upload/route.ts

@@ -2,7 +2,7 @@ import { hasPermission } from "@cms/content/rbac"
 import { createMediaAsset } from "@cms/db"
 
 import { auth, resolveRoleFromAuthSession } from "@/lib/auth/server"
-import { storeUploadLocally } from "@/lib/media/local-storage"
+import { storeUpload } from "@/lib/media/storage"
 
 export const runtime = "nodejs"
 
@@ -147,7 +147,7 @@ export async function POST(request: Request): Promise<Response> {
   }
 
   try {
-    const stored = await storeUploadLocally({
+    const stored = await storeUpload({
       file: fileEntry,
       mediaType: type,
     })
@@ -170,14 +170,17 @@ export async function POST(request: Request): Promise<Response> {
     return Response.json(
       {
         id: created.id,
+        provider: stored.provider,
         notice: "Media uploaded successfully.",
       },
       { status: 201 },
     )
-  } catch {
+  } catch (error) {
+    const message = error instanceof Error ? error.message : "Upload failed. Please try again."
+
     return Response.json(
       {
-        message: "Upload failed. Please try again.",
+        message,
       },
       { status: 500 },
     )

apps/admin/src/app/media/page.tsx

@@ -2,6 +2,7 @@ import { getMediaFoundationSummary, listMediaAssets } from "@cms/db"
 
 import { AdminShell } from "@/components/admin-shell"
 import { MediaUploadForm } from "@/components/media/media-upload-form"
+import { resolveMediaStorageProvider } from "@/lib/media/storage"
 import { requirePermissionForRoute } from "@/lib/route-guards"
 
 export const dynamic = "force-dynamic"
@@ -33,6 +34,7 @@ export default async function MediaManagementPage({
   ])
   const notice = readFirstValue(resolvedSearchParams.notice)
   const error = readFirstValue(resolvedSearchParams.error)
+  const activeStorageProvider = resolveMediaStorageProvider(process.env.CMS_MEDIA_STORAGE_PROVIDER)
 
   return (
     <AdminShell
@@ -78,8 +80,8 @@ export default async function MediaManagementPage({
       <section className="rounded-xl border border-neutral-200 p-6">
         <h2 className="text-xl font-medium">Upload Media Asset</h2>
         <p className="mt-1 text-sm text-neutral-600">
-          Files are currently stored via local adapter. S3/object storage is the next incremental
-          step.
+          Upload storage provider: <strong>{activeStorageProvider}</strong>. You can switch via
+          `CMS_MEDIA_STORAGE_PROVIDER` (`local` or `s3`) until the admin settings toggle lands.
         </p>
         <MediaUploadForm />
       </section>