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/tuxedo/layout.tsx

@@ -1,12 +1,43 @@
 import type { Metadata } from "next";
 
+const BASE_URL = process.env.NEXT_PUBLIC_SITE_URL ?? "https://routecommerce.com";
+
 export const metadata: Metadata = {
-  title: "Tuxedo Corn | Fresh Produce Wholesale",
+  title: {
+    default: "Tuxedo Corn | Fresh Produce Wholesale",
+    template: "%s | Tuxedo Corn",
+  },
   description: "Premium sweet corn and seasonal produce delivered fresh from the farm to pickup stops near you. Shop wholesale pricing on Tuxedo Corn.",
+  keywords: ["sweet corn", "Olathe Sweet", "Colorado produce", "wholesale corn", "farm fresh", "pickup stops", "wholesale produce"],
   openGraph: {
-    title: "Tuxedo Corn",
-    description: "Premium sweet corn and seasonal produce, delivered fresh from our farm to your community.",
-    siteName: "Route Commerce",
+    title: "Tuxedo Corn | Olathe Sweet Sweet Corn",
+    description: "Premium sweet corn and seasonal produce, delivered fresh from our Colorado farm to pickup stops near you.",
+    url: `${BASE_URL}/tuxedo`,
+    siteName: "Tuxedo Corn",
+    locale: "en_US",
+    type: "website",
+    images: [
+      {
+        url: "/og-tuxedo.jpg",
+        width: 1200,
+        height: 630,
+        alt: "Tuxedo Corn - Olathe Sweet Sweet Corn",
+      },
+    ],
+  },
+  twitter: {
+    card: "summary_large_image",
+    title: "Tuxedo Corn | Fresh Produce Wholesale",
+    description: "Premium sweet corn and seasonal produce delivered fresh from our Colorado farm to pickup stops near you.",
+    site: "@TuxedoCorn",
+    images: ["/og-tuxedo.jpg"],
+  },
+  alternates: {
+    canonical: `${BASE_URL}/tuxedo`,
+  },
+  robots: {
+    index: true,
+    follow: true,
   },
 };