Add Sonner-based notifications and UX polish

app/root/media/page.tsx

@@ -1,8 +1,6 @@
 import { redirect } from "next/navigation";
 
-import { FlashMessage } from "@/components/root/flash-message";
 import { MediaLibraryManager } from "@/components/root/media-library-manager";
-import { MotionFade } from "@/components/motion-fade";
 import { RootDashboardShell } from "@/components/root/root-dashboard-shell";
 import { clearAdminSessionCookie, isAdminAuthenticated } from "@/lib/admin-auth";
 import { getAdminMediaAssets } from "@/lib/media";
@@ -22,14 +20,7 @@ const copy = {
   backToSite: "Zur Website",
 };
 
-type RootMediaPageProps = {
-  searchParams?: {
-    success?: string;
-    error?: string;
-  };
-};
-
-export default async function RootMediaPage({ searchParams }: RootMediaPageProps) {
+export default async function RootMediaPage() {
   if (!isAdminAuthenticated()) {
     redirect("/root");
   }
@@ -52,18 +43,6 @@ export default async function RootMediaPage({ searchParams }: RootMediaPageProps
       headerDescription={copy.subtitle}
     >
       <div className="space-y-6">
-        {searchParams?.success ? (
-          <MotionFade delay={0.1}>
-            <FlashMessage type="success" message={searchParams.success} />
-          </MotionFade>
-        ) : null}
-
-        {searchParams?.error ? (
-          <MotionFade delay={0.12}>
-            <FlashMessage type="error" message={searchParams.error} />
-          </MotionFade>
-        ) : null}
-
         <MediaLibraryManager mediaAssets={mediaAssets} />
       </div>
     </RootDashboardShell>