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 },
     )