copy(roadmap): Multi-game Formulae, Operator API, The Exchange, Fleet Block clarifier

Commander copy pass:
- 'Multi-game expansion — game Formulae' -> 'Multi-game Formulae' (cleaner grammar)
- 'API access and integrations' -> 'Operator API and integrations' (operator-grade framing)
- 'Integrated storefront' -> 'The Exchange' (chemistry-flavored; ion-exchange nod,
  no collision with the locked 'Compound' = stack group)
- 'Fleet Block capacity management' gains a clarifier note: pooled host capacity,
  allocation, and utilization

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

frontend/src/views/marketing/RoadmapView.vue

@@ -52,7 +52,7 @@ const groups: RoadmapGroup[] = [
   },
   {
     status: 'in-progress',
-    label: 'Multi-game expansion — game Formulae',
+    label: 'Multi-game Formulae',
     description:
       'Per-game Formulae extend the control plane with game-specific operational logic. Rust is the reference implementation; Dune, Conan, and Soulmask follow the same deployment model.',
     items: [
@@ -63,7 +63,7 @@ const groups: RoadmapGroup[] = [
   },
   {
     status: 'in-progress',
-    label: 'API access and integrations',
+    label: 'Operator API and integrations',
     description:
       'Operator-grade API access so you can build your own tooling on top of the Corrosion control plane. Webhooks and per-license API keys are live; key-authenticated external API access lands next.',
     items: [
@@ -74,9 +74,9 @@ const groups: RoadmapGroup[] = [
   },
   {
     status: 'planned',
-    label: 'Integrated storefront',
+    label: 'The Exchange',
     description:
-      'A native store layer for server communities — item catalog, VIP packages, and automated in-game delivery. No Tebex dependency required.',
+      'Corrosion\'s native storefront for server communities — item catalog, VIP packages, and automated in-game delivery. No Tebex dependency required.',
     items: [
       { text: 'Item catalog and categories' },
       { text: 'PayPal and Stripe payment processing' },
@@ -93,7 +93,7 @@ const groups: RoadmapGroup[] = [
       { text: 'Fleet-level dashboards and health monitoring' },
       { text: 'Multi-host re-Agent orchestration' },
       { text: 'Bulk wipe and update scheduling across a fleet' },
-      { text: 'Fleet Block capacity management' },
+      { text: 'Fleet Block capacity management', note: 'Pooled host capacity, allocation, and utilization' },
     ],
   },
   {