docs(27): create phase plan

.planning/ROADMAP.md

@@ -129,14 +129,19 @@ Plans:
 ### Phase 27: Top Nav Restructure & Search Bar Rethink
 **Goal**: Replace the minimal TotalsBar with a persistent top navigation bar (logo, section links, catalog search, user avatar) and move mobile navigation to a bottom tab bar — elevating Setups to top-level and removing the landing page hero
 **Depends on**: Phase 26
-**Requirements**: TBD
+**Requirements**: NAV-01, NAV-02, NAV-03, NAV-04, NAV-05
 **Success Criteria** (what must be TRUE):
   1. A persistent top nav bar shows logo, Home/Collection/Setups links, catalog search, and user avatar on desktop
   2. Clicking Collection or Setups while anonymous triggers AuthPromptModal instead of navigating
   3. On mobile, navigation appears as a fixed bottom tab bar with Home, Collection, Setups, and Search icons
   4. The landing page no longer has a hero section — content starts with Popular Setups
   5. Setups has its own top-level route accessible from the nav bar, not nested in Collection tabs
-**Plans**: TBD
+**Plans**: 3 plans
+
+Plans:
+- [ ] 27-01-PLAN.md — TopNav and BottomTabBar components
+- [ ] 27-02-PLAN.md — Setups top-level route and Collection tab simplification
+- [ ] 27-03-PLAN.md — Root layout wiring, hero removal, and visual verification
 **UI hint**: yes
 
 ## Progress