polish: consolidate typography to next/font variables, add atelier utility classes

- Remove Google Fonts @import from 4 components (SiteHeader, LandingPageWrapper,
  TestimonialsAndCTA, FeaturesAndStats) — eliminate render-blocking external
  request and font flash
- Replace all unloaded Cormorant Garamond / Playfair Display / DM Sans /
  Plus Jakarta Sans references with the existing next/font variables
  (Fraunces, Manrope, Fragment_Mono) — visual coherence with the design system
- Update 9 pages (blog, brands, changelog, maintenance, protected-example,
  roadmap, security, waitlist, WaitlistForm) to use the loaded Fraunces
- Fix dead --font-geist / --font-jetbrains-mono references in
  admin-design-system.css (now point to --font-manrope / --font-fragment-mono
  which are actually loaded)
- Add atelier-pill, atelier-numerals, atelier-fineprint, atelier-canvas-soft
  utility classes; .atelier-input:focus-visible refined ring
- Add .ha-field-textarea, .ha-scroll, .ha-skeleton to admin design system
- Extend prefers-reduced-motion guard to atelier-enter/stagger/shimmer
- Apply atelier-fineprint to login/not-found/error pages for consistency
- No structural changes; build passes, 0 type errors

src/app/waitlist/page.tsx

@@ -23,7 +23,7 @@ export default function WaitlistPage() {
                 <path strokeLinecap="round" strokeLinejoin="round" d="M13 10V3L4 14h7v7l9-11h-7z" />
               </svg>
             </div>
-            <span className="text-xl font-bold text-[#1a1a1a] tracking-tight" style={{ fontFamily: "'Cormorant Garamond', Georgia, serif" }}>Route Commerce</span>
+            <span className="text-xl font-bold text-[#1a1a1a] tracking-tight" style={{ fontFamily: "var(--font-fraunces)" }}>Route Commerce</span>
           </Link>
         </div>
       </header>
@@ -37,7 +37,7 @@ export default function WaitlistPage() {
               <span className="w-2 h-2 bg-[#c97a3e] rounded-full animate-pulse" />
               <span className="text-sm font-medium text-[#c97a3e]">Early Access</span>
             </div>
-            <h1 className="text-5xl sm:text-6xl font-bold text-[#1a1a1a] leading-tight mb-6" style={{ fontFamily: "'Cormorant Garamond', Georgia, serif" }}>
+            <h1 className="text-5xl sm:text-6xl font-bold text-[#1a1a1a] leading-tight mb-6" style={{ fontFamily: "var(--font-fraunces)" }}>
               Join 500+ farms on the waitlist
             </h1>
             <p className="text-xl text-[#6b8f71] mb-8 leading-relaxed">
@@ -76,7 +76,7 @@ export default function WaitlistPage() {
           {/* Right - Form */}
           <div>
             <div className="bg-white rounded-3xl p-8 sm:p-10 shadow-xl border border-[#e5e5e5]">
-              <h2 className="text-2xl font-bold text-[#1a1a1a] mb-2" style={{ fontFamily: "'Cormorant Garamond', Georgia, serif" }}>
+              <h2 className="text-2xl font-bold text-[#1a1a1a] mb-2" style={{ fontFamily: "var(--font-fraunces)" }}>
                 Reserve Your Spot
               </h2>
               <p className="text-[#888] mb-6">No credit card required. We&apos;ll notify you when it&apos;s your turn.</p>
@@ -89,7 +89,7 @@ export default function WaitlistPage() {
       {/* FAQ Section */}
       <section className="border-t border-[#e5e5e5] bg-white">
         <div className="max-w-3xl mx-auto px-6 py-16">
-          <h2 className="text-3xl font-bold text-[#1a1a1a] mb-8 text-center" style={{ fontFamily: "'Cormorant Garamond', Georgia, serif" }}>
+          <h2 className="text-3xl font-bold text-[#1a1a1a] mb-8 text-center" style={{ fontFamily: "var(--font-fraunces)" }}>
             Frequently Asked Questions
           </h2>
           <div className="space-y-4">