fix: Apple HIG mobile responsiveness - hero typography, tables, SEO metadata

Mobile:
- HeroSection: scale typography 7xl → 4xl sm:5xl md:6xl lg:7xl, responsive px/py
- StorefrontFooter: newsletter input responsive w-full sm:w-52, larger touch targets
- AdminTable: add overflow-x-auto + min-w-[600px] for horizontal scroll
- AdminOrdersPanel: same table overflow fix
- AdminFilterTabs: increase text sizes sm:text-xs, add padding
- Tuxedo page: SectionHeader mobile-first sizing, feature grid grid-cols-1 sm:2
- Tuxedo feature labels: show on all screens (remove hidden sm:block)

SEO:
- Root layout: add viewport export, full OG/Twitter metadata, metadataBase
- Tuxedo layout: complete OG + Twitter card + canonical + keywords + robots
- Indian River layout: same complete SEO treatment

All TypeScript checks pass.

src/app/layout.tsx

@@ -1,10 +1,45 @@
-import type { Metadata } from "next";
+import type { Metadata, Viewport } from "next";
 import "./globals.css";
 import { Providers } from "@/components/Providers";
 
+const BASE_URL = process.env.NEXT_PUBLIC_SITE_URL ?? "https://routecommerce.com";
+
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  themeColor: "#0a0a0a",
+};
+
 export const metadata: Metadata = {
-  title: "Route Commerce",
-  description: "B2B produce wholesale platform",
+  title: {
+    default: "Route Commerce | Fresh Produce Wholesale Platform",
+    template: "%s | Route Commerce",
+  },
+  description: "Multi-tenant B2B e-commerce platform for fresh produce wholesale distribution. Brands sell to customers who pick up at scheduled stops or receive shipments.",
+  keywords: ["wholesale produce", "farm fresh", "B2B e-commerce", "produce distribution", "pickup stops", "fresh produce"],
+  metadataBase: new URL(BASE_URL),
+  openGraph: {
+    title: "Route Commerce | Fresh Produce Wholesale Platform",
+    description: "Multi-tenant B2B e-commerce platform for fresh produce wholesale distribution.",
+    url: BASE_URL,
+    siteName: "Route Commerce",
+    locale: "en_US",
+    type: "website",
+  },
+  twitter: {
+    card: "summary_large_image",
+    title: "Route Commerce | Fresh Produce Wholesale Platform",
+    description: "Multi-tenant B2B e-commerce platform for fresh produce wholesale distribution.",
+    site: "@RouteCommerce",
+  },
+  robots: {
+    index: true,
+    follow: true,
+    googleBot: {
+      index: true,
+      follow: true,
+    },
+  },
 };
 
 export default function RootLayout({