docs(18-04): complete global item catalog client plan

- SUMMARY.md with task commits and decisions
- STATE.md updated with progress and decisions
- ROADMAP.md updated with plan progress (4/5 plans complete)
- REQUIREMENTS.md: GLOB-03, GLOB-04, GLOB-05 marked complete

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.3
 milestone_name: Research & Decision Tools
 status: planning
-stopped_at: Completed 18-03-PLAN.md
-last_updated: "2026-04-05T11:12:57.693Z"
+stopped_at: Completed 18-04-PLAN.md
+last_updated: "2026-04-05T11:19:34.718Z"
 last_activity: 2026-04-03 — v2.0 roadmap created (Phases 14-18)
 progress:
-  total_phases: 8
-  completed_phases: 6
-  total_plans: 12
-  completed_plans: 11
+  total_phases: 12
+  completed_phases: 10
+  total_plans: 33
+  completed_plans: 30
   percent: 0
 ---
 
@@ -55,6 +55,7 @@ Key decisions made during v2.0 planning:
 - Separate globalItems table — not a flag on user items table
 - Single-user SQLite mode diverges at v2.0 boundary
 - [Phase 18]: Public endpoints bypass auth via regex path matching in index.ts middleware
+- [Phase 18]: Debounce search at component level (300ms) for global catalog
 
 ### Pending Todos
 
@@ -67,6 +68,6 @@ None active.
 
 ## Session Continuity
 
-Last session: 2026-04-05T11:12:57.691Z
-Stopped at: Completed 18-03-PLAN.md
+Last session: 2026-04-05T11:19:34.716Z
+Stopped at: Completed 18-04-PLAN.md
 Resume file: None