diff --git a/app/portal/page.tsx b/app/portal/page.tsx
index db6afde..2914d3d 100644
--- a/app/portal/page.tsx
+++ b/app/portal/page.tsx
@@ -1,8 +1,9 @@
 import { Card, CardContent, Badge } from "poyraz-ui/atoms";
-import { FolderKanban, CheckCircle2, Clock, BarChart, type LucideIcon } from "lucide-react";
+import { FolderKanban, CheckCircle2, Clock, BarChart } from "lucide-react";
 import Link from "next/link";
 import { format } from "date-fns";
 import { tr } from "date-fns/locale";
+import { StatCard } from "@/components/system/stat-card";
 import { requirePortalBackend } from "@/server/web/portal";
 
 export default async function PortalDashboardPage() {
@@ -76,29 +77,3 @@ export default async function PortalDashboardPage() {
     </div>
   );
 }
-
-function StatCard({ label, value, icon: Icon, tone }: {
-  label: string;
-  value: string;
-  icon: LucideIcon;
-  tone: "green" | "blue" | "amber";
-}) {
-  const toneClass = {
-    green: "bg-emerald-50 text-emerald-700",
-    blue: "bg-blue-50 text-blue-700",
-    amber: "bg-amber-50 text-amber-700",
-  }[tone];
-  return (
-    <Card>
-      <CardContent className="flex items-center justify-between gap-3 p-4">
-        <div>
-          <p className="text-sm text-muted-foreground">{label}</p>
-          <p className="mt-1 text-2xl font-semibold text-foreground">{value}</p>
-        </div>
-        <div className={`flex h-10 w-10 shrink-0 items-center justify-center rounded-sm ${toneClass}`}>
-          <Icon className="h-5 w-5" />
-        </div>
-      </CardContent>
-    </Card>
-  );
-}
diff --git a/components/error-toaster.tsx b/components/error-toaster.tsx
index 816d580..ee4f356 100644
--- a/components/error-toaster.tsx
+++ b/components/error-toaster.tsx
@@ -6,7 +6,7 @@ import { toast } from "poyraz-ui/molecules";
 export function ErrorToaster({ message }: { message: string }) {
   useEffect(() => {
     if (message) {
-      toast.error(message);
+      toast.error(message, { id: `route-error:${message}` });
     }
   }, [message])
 
diff --git a/scripts/phase4-ui-boundary.mjs b/scripts/phase4-ui-boundary.mjs
index b476bd3..a9079e1 100644
--- a/scripts/phase4-ui-boundary.mjs
+++ b/scripts/phase4-ui-boundary.mjs
@@ -7,6 +7,10 @@ const repoRoot = process.cwd();
 const packageJson = JSON.parse(fs.readFileSync(path.join(repoRoot, "package.json"), "utf8"));
 const globalsCss = fs.readFileSync(path.join(repoRoot, "app/globals.css"), "utf8");
 const appShell = fs.readFileSync(path.join(repoRoot, "components/layout/app-shell.tsx"), "utf8");
+const errorToaster = fs.readFileSync(
+  path.join(repoRoot, "components/error-toaster.tsx"),
+  "utf8",
+);
 const loginActions = fs.readFileSync(path.join(repoRoot, "app/login/actions.ts"), "utf8");
 const rootLayout = fs.readFileSync(path.join(repoRoot, "app/layout.tsx"), "utf8");
 const brandingService = fs.readFileSync(
@@ -68,6 +72,11 @@ assert.doesNotMatch(
   /<DropdownMenuItem[^>]*\binteractiveMotion=/s,
   "Poyraz UI 3.0.2 leaks DropdownMenuItem interactiveMotion to the DOM",
 );
+assert.match(
+  errorToaster,
+  /toast\.error\(message,\s*\{\s*id:/,
+  "Route error toasts must use a stable id so React development effects cannot duplicate them",
+);
 assert.doesNotMatch(
   appShell,
   /<form\s+action=\{signOut\}>/,
@@ -183,6 +192,7 @@ for (const statPage of [
   "app/(dashboard)/projects/projects-client.tsx",
   "app/(dashboard)/journal/journal-client.tsx",
   "app/(dashboard)/finance/finance-client.tsx",
+  "app/portal/page.tsx",
 ]) {
   const content = fs.readFileSync(path.join(repoRoot, statPage), "utf8");
   assert.ok(