fix: full Apple HIG mobile + SEO audit - all issues resolved

MOBILE RESPONSIVENESS (Apple HIG):
- HeroSection: typography scaled 7xl→4xl sm:5xl md:6xl lg:7xl, responsive px/py, rounded-2xl, active:scale-95
- Cart quantity buttons: h-8→h-11 w-8→w-11 (44px touch target), rounded-xl, active:scale-95
- StorefrontFooter newsletter: responsive w-full sm:w-52 lg:w-64, aria-label, larger touch targets
- StorefrontHeader mobile nav: padding px-6→px-4 py-6→py-5
- AdminTable: overflow-x-auto + min-w-[600px] for horizontal scroll
- AdminOrdersPanel: same table overflow fix
- AdminLayout: mobile px-4 sm:px-6 py-6 sm:py-10
- AdminFilterTabs: responsive text/text sizes
- AdminSidebar hamburger: h-10→h-11 w-10→w-11 (44px touch target)
- DashboardClient: grid gap-3 sm:gap-4, responsive stat text
- OrderEditForm: grid-cols-1 sm:grid-cols-2 (was 2, breaks on mobile)
- BillingClient: min-h-[44px] on select/button
- ProductsClient: h-32 sm:h-40 responsive image height
- StopCard: line-clamp-2 instead of line-clamp-1 on location
- CommunicationsPage: tabs wrapped in overflow-x-auto
- Checkout page: grid breakpoint md not lg
- Tuxedo page: SectionHeader mobile-first, feature grid grid-cols-1 sm:2, label visible
- Tuxedo stats: text-3xl sm:text-4xl

SEO METADATA:
- Root layout: viewport export, full OG/Twitter, metadataBase, keywords, robots
- Tuxedo layout: complete OG + Twitter + canonical + keywords
- Indian River layout: complete OG + Twitter + canonical + keywords
- Tuxedo/IRD FAQ pages: new layout.tsx with full metadata + FAQPage JSON-LD schema
- Tuxedo/IRD Contact pages: new layout.tsx with full metadata
- Pricing page: expanded metadata with OG/Twitter
- Contact page: refactored to layout+ClientPage structure
- Sitemap: updated with dynamic stop URLs, async function

SCHEMA + STRUCTURED DATA:
- FAQPage JSON-LD on FAQ pages
- BreadcrumbList JSON-LD on storefront layouts
- BreadcrumbNav component created (Apple HIG compliant)

BUG FIXES:
- Indian River: replaced raw <img> with Next.js Image component
- Indian River: verified single H1 (others are h2)
- Stop card: location line-clamp-2 for better readability

TYPE CHECK: all pass

supabase/migrations/146_sitemap_stops_rpc.sql

@@ -0,0 +1,32 @@
+-- Migration: 146_sitemap_stops_rpc.sql
+-- Description: RPC to fetch active stops with brand slug for sitemap generation
+
+CREATE OR REPLACE FUNCTION get_active_stops_with_brand()
+RETURNS TABLE (
+  slug TEXT,
+  brand_slug TEXT,
+  last_modified TIMESTAMPTZ
+)
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+BEGIN
+  RETURN QUERY
+  SELECT
+    s.slug,
+    b.slug AS brand_slug,
+    COALESCE(s.updated_at, s.created_at) AS last_modified
+  FROM stops s
+  INNER JOIN brands b ON s.brand_id = b.id
+  WHERE s.active = true
+    AND s.slug IS NOT NULL
+    AND b.slug IN ('tuxedo', 'indian-river-direct')
+  ORDER BY s.updated_at DESC;
+END;
+$$;
+
+-- Grant execute to anon and service role
+GRANT EXECUTE ON FUNCTION get_active_stops_with_brand() TO anon;
+GRANT EXECUTE ON FUNCTION get_active_stops_with_brand() TO service_role;
+GRANT EXECUTE ON FUNCTION get_active_stops_with_brand() TO authenticated;