docs(04): create phase plan — marketplace & portal navigation (4 plans, 3 waves)

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

.planning/ROADMAP.md

@@ -130,7 +130,21 @@ Decimal phases appear between their surrounding integers in numeric order.
   4. User can select a module from the sidebar and it opens in the main content area
   5. User can search and filter modules in the sidebar
 
-**Plans**: TBD
+**Plans**: 4 plans
+
+**Wave 1**
+
+- [ ] 04-01-PLAN.md -- Test infra (Vitest) + marketplace i18n + Marketplace page slice: card grid browse + activate (MRKT-01/02/04)
+
+**Wave 2** *(blocked on Wave 1 completion)*
+
+- [ ] 04-02-PLAN.md -- Marketplace refinements: search/category/status filters, deactivation dialog, toast, Super-Admin tenant context, module detail page
+- [ ] 04-03-PLAN.md -- Sidebar enhancement: Next.js Link + usePathname active state, per-module links, sidebar search, live refresh (PRTAL-02/03/05, MRKT-03)
+
+**Wave 3** *(blocked on Wave 2 completion)*
+
+- [ ] 04-04-PLAN.md -- Visual Verification: Human confirms marketplace, activation, tenant context, and sidebar navigation
+
 **UI hint**: yes
 
 ### Phase 5: Dashboard & Calendar
@@ -174,6 +188,6 @@ Phases execute in numeric order: 1 -> 2 -> 3 -> 4 -> 5 -> 6
 | 1. Foundation & Portal Shell | 2/3 | In Progress | - |
 | 2. Authentication & Multi-Tenancy | 2/5 | In Progress|  |
 | 3. Module System & Domaincheck | 3/4 | In Progress|  |
-| 4. Marketplace & Portal Navigation | 0/TBD | Not started | - |
+| 4. Marketplace & Portal Navigation | 0/4 | Not started | - |
 | 5. Dashboard & Calendar | 0/TBD | Not started | - |
 | 6. Desktop Client & CI/CD | 0/TBD | Not started | - |