docs(22): create phase plan for add-from-catalog and thread integration

.planning/ROADMAP.md

@@ -228,7 +228,10 @@ Plans:
   1. User can add a catalog item to collection with one confirmation step (category picker + notes)
   2. User can add catalog items as thread candidates instantly from search
   3. Resolving a catalog-linked candidate creates a properly linked reference item in collection
-**Plans**: TBD
+**Plans:** 2 plans
+Plans:
+- [ ] 22-01-PLAN.md -- UIStore + sonner + AddToCollectionModal + overlay/detail page collection wiring
+- [ ] 22-02-PLAN.md -- AddToThreadModal with thread picker + new thread flow + CATFLOW-06 verification
 **UI hint**: yes
 
 ### Phase 23: Manual Entry Fallback
@@ -267,5 +270,5 @@ Plans:
 | 19. Reference Item Model & Tags Schema | v2.0 | 3/3 | Complete    | 2026-04-05 |
 | 20. FAB & Full-Screen Catalog Search | v2.0 | 2/2 | Complete    | 2026-04-06 |
 | 21. Item & Catalog Detail Pages | v2.0 | 1/1 | Complete    | 2026-04-06 |
-| 22. Add-from-Catalog & Thread Integration | v2.0 | 0/? | Not started | - |
+| 22. Add-from-Catalog & Thread Integration | v2.0 | 0/2 | Not started | - |
 | 23. Manual Entry Fallback | v2.0 | 0/? | Not started | - |