refactor(media): use asset-centric storage key layout

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

@@ -1,6 +1,7 @@
 import { getMediaFoundationSummary, listMediaAssets } from "@cms/db"
 
 import { AdminShell } from "@/components/admin-shell"
+import { FlashQueryCleanup } from "@/components/media/flash-query-cleanup"
 import { MediaUploadForm } from "@/components/media/media-upload-form"
 import { resolveMediaStorageProvider } from "@/lib/media/storage"
 import { requirePermissionForRoute } from "@/lib/route-guards"
@@ -34,7 +35,10 @@ export default async function MediaManagementPage({
   ])
   const notice = readFirstValue(resolvedSearchParams.notice)
   const error = readFirstValue(resolvedSearchParams.error)
+  const uploadedVia = readFirstValue(resolvedSearchParams.uploadedVia)
+  const warning = readFirstValue(resolvedSearchParams.warning)
   const activeStorageProvider = resolveMediaStorageProvider(process.env.CMS_MEDIA_STORAGE_PROVIDER)
+  const hasFlashQuery = Boolean(notice || error || warning || uploadedVia)
 
   return (
     <AdminShell
@@ -44,9 +48,18 @@ export default async function MediaManagementPage({
       title="Media"
       description="Media foundation baseline for assets, artwork renditions, and grouping metadata."
     >
+      <FlashQueryCleanup enabled={hasFlashQuery} />
+
       {notice ? (
         <section className="rounded-xl border border-emerald-300 bg-emerald-50 px-4 py-3 text-sm text-emerald-800">
-          {notice}
+          <div className="flex flex-wrap items-center gap-2">
+            <span>{notice}</span>
+            {uploadedVia ? (
+              <span className="rounded border border-emerald-300 bg-white px-2 py-0.5 text-xs font-medium uppercase tracking-wide text-emerald-700">
+                Stored via: {uploadedVia}
+              </span>
+            ) : null}
+          </div>
         </section>
       ) : null}
 
@@ -56,6 +69,12 @@ export default async function MediaManagementPage({
         </section>
       ) : null}
 
+      {warning ? (
+        <section className="rounded-xl border border-amber-300 bg-amber-50 px-4 py-3 text-sm text-amber-900">
+          {warning}
+        </section>
+      ) : null}
+
       <section className="grid gap-3 sm:grid-cols-2 xl:grid-cols-3">
         <article className="rounded-xl border border-neutral-200 p-4">
           <p className="text-xs uppercase tracking-[0.2em] text-neutral-500">Media Assets</p>