feat(boss-dashboard): add /(mobile)/m layout with viewport + manifest link

src/app/(mobile)/m/layout.tsx

@@ -0,0 +1,26 @@
+import type { Metadata, Viewport } from "next";
+import type { ReactNode } from "react";
+
+export const metadata: Metadata = {
+  title: "WFDASH — Boss Phone",
+  description: "Boss's glance view of sales rep activity, orders placed, and driver stops.",
+  manifest: "/manifest-mobile.json",
+  icons: {
+    apple: "/apple-touch-icon.png",
+  },
+};
+
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  viewportFit: "cover",
+  themeColor: "#0b1020",
+};
+
+export default function MobileLayout({ children }: { children: ReactNode }) {
+  return (
+    <main className="min-h-screen bg-background text-foreground antialiased">
+      {children}
+    </main>
+  );
+}