Improve admin save UX and portfolio navigation

app/root/portfolio/projects/[id]/page.tsx

@@ -1,8 +1,8 @@
 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 { PortfolioSubnav } from "@/components/root/portfolio-subnav";
 import { RootDashboardShell } from "@/components/root/root-dashboard-shell";
 import { AppCard } from "@/components/ui/app-card";
 import { Button } from "@/components/ui/button";
@@ -67,7 +67,7 @@ export default async function RootPortfolioProjectPage({
   ]);
 
   if (!project) {
-    redirect("/root/portfolio/projects?error=Project+not+found.");
+    redirect("/root/portfolio?error=Project+not+found.");
   }
 
   return (
@@ -78,22 +78,18 @@ export default async function RootPortfolioProjectPage({
       logoutAction={logoutAction}
       headerTitle={copy.title}
       headerDescription={copy.subtitle}
-      toolbar={<PortfolioSubnav active="projects" />}
+      saveFormId="portfolio-project-form"
     >
       <div className="space-y-6">
         {searchParams?.success ? (
           <MotionFade delay={0.1}>
-            <p className="rounded-nested border border-status-success/30 bg-status-success/10 px-4 py-3 text-sm text-status-success">
-              {searchParams.success}
-            </p>
+            <FlashMessage type="success" message={searchParams.success} />
           </MotionFade>
         ) : null}
 
         {searchParams?.error ? (
           <MotionFade delay={0.12}>
-            <p className="rounded-nested border border-destructive/30 bg-destructive/10 px-4 py-3 text-sm text-destructive">
-              {searchParams.error}
-            </p>
+            <FlashMessage type="error" message={searchParams.error} />
           </MotionFade>
         ) : null}
 
@@ -103,6 +99,7 @@ export default async function RootPortfolioProjectPage({
             categories={categories}
             mediaOptions={mediaOptions}
             project={project}
+            formId="portfolio-project-form"
             redirectPath={`/root/portfolio/projects/${project.id}`}
             submitLabel={copy.saveProject}
           />