docs(06): create phase plan for global site selection (5 plans, 3 waves)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -36,7 +36,13 @@
   2. Selecting sites in the toolbar causes all feature tabs to default to those sites when an operation is run
   3. A user can override the global selection on any individual tab without clearing the global state
   4. The global site selection persists across tab switches within the same session
-**Plans**: TBD
+**Plans:** 5 plans
+Plans:
+- [ ] 06-01-PLAN.md — GlobalSitesChangedMessage + FeatureViewModelBase extension
+- [ ] 06-02-PLAN.md — MainWindowViewModel global selection state + command
+- [ ] 06-03-PLAN.md — Toolbar UI, dialog wiring, and localization keys
+- [ ] 06-04-PLAN.md — Tab VM updates for global site consumption
+- [ ] 06-05-PLAN.md — Unit tests for global site selection flow
 
 ### Phase 7: User Access Audit
 **Goal**: Administrators can audit every permission a specific user holds across selected sites and export the results
@@ -80,7 +86,7 @@
 | 3. Storage and File Operations | v1.0 | 8/8 | Complete | 2026-04-02 |
 | 4. Bulk Operations and Provisioning | v1.0 | 10/10 | Complete | 2026-04-03 |
 | 5. Distribution and Hardening | v1.0 | 3/3 | Complete | 2026-04-03 |
-| 6. Global Site Selection | v1.1 | 0/? | Not started | - |
+| 6. Global Site Selection | v1.1 | 0/5 | Planned | - |
 | 7. User Access Audit | v1.1 | 0/? | Not started | - |
 | 8. Simplified Permissions | v1.1 | 0/? | Not started | - |
 | 9. Storage Visualization | v1.1 | 0/? | Not started | - |