Add Sonner-based notifications and UX polish

app/root/portfolio/projects/[id]/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 { PortfolioProjectForm } from "@/components/root/portfolio-project-form";
 import { RootDashboardShell } from "@/components/root/root-dashboard-shell";
 import { AppCard } from "@/components/ui/app-card";
@@ -39,15 +38,10 @@ type RootPortfolioProjectPageProps = {
   params: {
     id: string;
   };
-  searchParams?: {
-    success?: string;
-    error?: string;
-  };
 };
 
 export default async function RootPortfolioProjectPage({
   params,
-  searchParams,
 }: RootPortfolioProjectPageProps) {
   if (!isAdminAuthenticated()) {
     redirect("/root");
@@ -82,18 +76,6 @@ export default async function RootPortfolioProjectPage({
       saveButtonLabel={copy.saveProject}
     >
       <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={0.15}>
           <PortfolioProjectForm
             action={saveProjectAction}