fix: sync browser title with site settings

app/layout.tsx

@@ -3,28 +3,35 @@ import { Toaster } from "sonner";
 import { ThemeProvider } from "@/components/theme-provider";
 import { FaviconUpdater } from "@/components/favicon-updater";
 import { ImageDeliveryOptimizer } from "@/components/image-delivery-optimizer";
+import { getSiteSettings } from "@/lib/db/queries";
 
 import "./globals.css";
 import { SessionProvider } from "next-auth/react";
 
 const metadataBase = resolveMetadataBase();
 
-export const metadata: Metadata = {
-  metadataBase,
-  title: {
-    template: "%s | yedir-ai",
-    default: "yedir-ai",
-  },
-  description: "AI design workspace for Canvas, Agent workflows, image editing, 3D/CAD, and local AI operations.",
-  icons: {
-    icon: [
-      { url: "/api/favicon", sizes: "any" },
-      { url: "/api/favicon", type: "image/x-icon" },
-    ],
-    apple: "/api/favicon",
-    shortcut: "/api/favicon",
-  },
-};
+export async function generateMetadata(): Promise<Metadata> {
+  const settings = await getSiteSettings().catch(() => null);
+  const siteName = String(settings?.siteName || "").trim() || "AI Chatbot";
+
+  return {
+    metadataBase,
+    title: {
+      template: `%s | ${siteName}`,
+      default: siteName,
+    },
+    description:
+      "AI design workspace for Canvas, Agent workflows, image editing, 3D/CAD, and local AI operations.",
+    icons: {
+      icon: [
+        { url: "/api/favicon", sizes: "any" },
+        { url: "/api/favicon", type: "image/x-icon" },
+      ],
+      apple: "/api/favicon",
+      shortcut: "/api/favicon",
+    },
+  };
+}
 
 function resolveMetadataBase() {
   const candidate =