feat(marketing): rebuild landing + layout from new design (multi-game, real content)

MarketingLayout + LandingView rebuilt from the delivered design as a multi-game platform site (was Rust-only stub): hero with per-game re-skin + panel mockup, 8-pain problem grid, agent-model shift, 4 self-themed game blueprints (Rust/Dune/Conan/Soulmask), core capabilities, wipe orchestration, built-like-infrastructure, public sites/storefront, pricing, serious-admins, final CTA, footer. REAL pricing (Hobby $9.99 / Community $19.99 / Operator $99.99 / Network $99.99 + $49.99 fleet block) + commercial-use definition + self-service support model ($125/hr prepaid blocks, 'a tool, not a managed service'). marketing.css ported (token-based). 6 icons added to the registry. No fabricated metrics/testimonials. Build green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/components/ds/core/Icon.vue

@@ -23,6 +23,8 @@ import {
   Ban, Flag,
   CircleAlert, ArrowDown, Award, DollarSign, FlaskConical, Mail, Package,
   Pencil, Save, ShoppingBag, Target, User,
+  // Marketing site additions
+  Route, Timer, Megaphone, DatabaseBackup, Store, Undo2,
 } from 'lucide-vue-next'
 
 const props = withDefaults(
@@ -58,6 +60,9 @@ const registry: Record<string, Component> = {
   'dollar-sign': DollarSign, 'flask-conical': FlaskConical, mail: Mail,
   package: Package, pencil: Pencil, save: Save, 'shopping-bag': ShoppingBag,
   target: Target, user: User,
+  // Marketing site additions
+  route: Route, timer: Timer, megaphone: Megaphone,
+  'database-backup': DatabaseBackup, store: Store, 'undo-2': Undo2,
 }
 
 const cmp = computed<Component | null>(() => registry[props.name] ?? null)