feat: Build 5 marketing pages with layout and routing

Landing page (hero, problem, shift, capabilities, wipe orchestration,
infrastructure, public sites, CTA), Pricing (3-tier cards), How It Works
(4-step walkthrough + architecture diagram), FAQ (10-item accordion),
Roadmap (6-phase timeline). All under /site/* with MarketingLayout
(sticky nav, 4-column footer). Routes wired, build clean.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/router/index.ts

@@ -134,6 +134,39 @@ const routes: RouteRecordRaw[] = [
     ],
   },
 
+  // Marketing site (public, no auth)
+  {
+    path: '/site',
+    component: () => import('@/components/layout/MarketingLayout.vue'),
+    children: [
+      {
+        path: '',
+        name: 'landing',
+        component: () => import('@/views/marketing/LandingView.vue'),
+      },
+      {
+        path: 'pricing',
+        name: 'pricing',
+        component: () => import('@/views/marketing/PricingView.vue'),
+      },
+      {
+        path: 'how-it-works',
+        name: 'how-it-works',
+        component: () => import('@/views/marketing/HowItWorksView.vue'),
+      },
+      {
+        path: 'faq',
+        name: 'faq',
+        component: () => import('@/views/marketing/FaqView.vue'),
+      },
+      {
+        path: 'roadmap',
+        name: 'roadmap',
+        component: () => import('@/views/marketing/RoadmapView.vue'),
+      },
+    ],
+  },
+
   // Status page
   {
     path: '/status',