Add Sonner-based notifications and UX polish

app/root/smtp/page.tsx

@@ -1,7 +1,6 @@
 import { redirect } from "next/navigation";
 
 import { MotionFade } from "@/components/motion-fade";
-import { FlashMessage } from "@/components/root/flash-message";
 import { RootDashboardShell } from "@/components/root/root-dashboard-shell";
 import { SMTPSettingsForm } from "@/components/root/smtp-settings-form";
 import { Button } from "@/components/ui/button";
@@ -27,14 +26,7 @@ const copy = {
   backToSite: "Zur Website",
 };
 
-type RootSMTPPageProps = {
-  searchParams?: {
-    success?: string;
-    error?: string;
-  };
-};
-
-export default async function RootSMTPPage({ searchParams }: RootSMTPPageProps) {
+export default async function RootSMTPPage() {
   if (!isAdminAuthenticated()) {
     redirect("/root");
   }
@@ -57,7 +49,6 @@ export default async function RootSMTPPage({ searchParams }: RootSMTPPageProps)
       headerTitle={copy.title}
       headerDescription={copy.subtitle}
       saveFormId="smtp-settings-form"
-      reloadDocumentOnSave
       headerActions={(
         <form action={sendTestEmailAction}>
           <Button type="submit" variant="outline">
@@ -67,18 +58,6 @@ export default async function RootSMTPPage({ searchParams }: RootSMTPPageProps)
       )}
     >
       <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}
-
         <MotionFade delay={0.16}>
           <SMTPSettingsForm
             action={saveMailSettingsAction}