docs: add backlog item 999.4 — top nav restructure and search bar rethink

.planning/ROADMAP.md

@@ -162,12 +162,7 @@ Plans:
 ### Phase 999.1: Rewrite E2E Tests for OIDC Auth (BACKLOG)
 **Goal**: E2E tests currently expect local username/password login but auth moved to external OIDC (Logto). Rewrite with mock OIDC provider or API-key-based auth bypass. Seed migration to Postgres is already done.
 **Requirements**: TBD
-**Plans**: 3 plans
-
-Plans:
-- [x] 26-01-PLAN.md — Discovery service layer with cursor pagination (TDD)
-- [x] 26-02-PLAN.md — Discovery routes, server registration, and client hooks
-- [ ] 26-03-PLAN.md — Landing page UI and PublicSetupCard enhancement
+**Plans**: TBD
 
 Plans:
 - [ ] TBD (promote with /gsd:review-backlog when ready)
@@ -175,12 +170,7 @@ Plans:
 ### Phase 999.2: Revamp Onboarding Flow (BACKLOG)
 **Goal**: Redesign the onboarding experience to match the current app style and flow. Replace the manual item edit form with the catalog search function. Visual refresh to align with the newer UI patterns.
 **Requirements**: TBD
-**Plans**: 3 plans
-
-Plans:
-- [x] 26-01-PLAN.md — Discovery service layer with cursor pagination (TDD)
-- [ ] 26-02-PLAN.md — Discovery routes, server registration, and client hooks
-- [ ] 26-03-PLAN.md — Landing page UI and PublicSetupCard enhancement
+**Plans**: TBD
 
 Plans:
 - [ ] TBD (promote with /gsd:review-backlog when ready)
@@ -188,12 +178,15 @@ Plans:
 ### Phase 999.3: Public Access Auth Model (BACKLOG)
 **Goal**: Rework auth so the app is accessible without logging in. Currently all routes require authentication, but public-facing pages (discovery/browse, shared setups, public profiles) should be viewable by unauthenticated users. Auth only required for write operations and personal data.
 **Requirements**: TBD
-**Plans**: 3 plans
-
-Plans:
-- [ ] 26-01-PLAN.md — Discovery service layer with cursor pagination (TDD)
-- [ ] 26-02-PLAN.md — Discovery routes, server registration, and client hooks
-- [ ] 26-03-PLAN.md — Landing page UI and PublicSetupCard enhancement
+**Plans**: TBD
+
+Plans:
+- [ ] TBD (promote with /gsd:review-backlog when ready)
+
+### Phase 999.4: Top Nav Navigation Restructure & Search Bar Rethink (BACKLOG)
+**Goal**: Replace dashboard-based navigation with a persistent top nav bar (Home, Collection, future sections). Collection consolidates gear, threads, and setups under one section. Rethink the catalog search overlay appearance and interaction when entering from collection context.
+**Requirements**: TBD
+**Plans**: TBD
 
 Plans:
 - [ ] TBD (promote with /gsd:review-backlog when ready)