fix: PR review fixes — restore viewport export, revert schema to PostgreSQL, merge 4 courses, strip content frontmatter

src/app/layout.tsx

@@ -4,11 +4,16 @@ import { AuthProvider } from "@/lib/AuthContext";
 import BottomNav from "@/components/BottomNav";
 import PWARegister from "@/components/PWARegister";
 
+export const viewport = {
+  width: "device-width",
+  initialScale: 1,
+  viewportFit: "cover",
+  themeColor: "#0a0a0f",
+};
+
 export const metadata: Metadata = {
   title: "Falah — Islamic Lifestyle",
   description: "Nur AI coaching, Halal marketplace, community & wallet",
-  viewport: "width=device-width, initial-scale=1, viewport-fit=cover",
-  themeColor: "#0a0a0f",
   appleWebApp: { capable: true, statusBarStyle: "black-translucent" },
   manifest: "/mobile/manifest.json",
   icons: {