docs(26-01): complete discovery service plan

- SUMMARY.md: discovery service with cursor pagination
- STATE.md: advanced to plan 2, added decisions, updated progress to 71%
- ROADMAP.md: phase 26 in progress (1/3 plans)
- REQUIREMENTS.md: DISC-02, DISC-03, DISC-04, INFR-02 marked complete

.planning/STATE.md

@@ -2,15 +2,15 @@
 gsd_state_version: 1.0
 milestone: v2.1
 milestone_name: Public Discovery
-status: verifying
-stopped_at: Phase 26 context gathered
-last_updated: "2026-04-10T12:33:01.475Z"
+status: executing
+stopped_at: Completed 26-01-PLAN.md
+last_updated: "2026-04-10T12:55:01.408Z"
 last_activity: 2026-04-10
 progress:
   total_phases: 6
   completed_phases: 2
-  total_plans: 4
-  completed_plans: 4
+  total_plans: 7
+  completed_plans: 5
   percent: 0
 ---
 
@@ -21,13 +21,13 @@ progress:
 See: .planning/PROJECT.md (updated 2026-04-09)
 
 **Core value:** Help people make better gear decisions — discover what others use, compare real-world data, and see how a potential buy affects your setup before committing.
-**Current focus:** Phase 25 — catalog-enrichment-agent-tools
+**Current focus:** Phase 26 — discovery-landing-page
 
 ## Current Position
 
-Phase: 999.1
-Plan: Not started
-Status: Phase complete — ready for verification
+Phase: 26 (discovery-landing-page) — EXECUTING
+Plan: 2 of 3
+Status: Ready to execute
 Last activity: 2026-04-10
 
 Progress: [░░░░░░░░░░] 0%
@@ -68,6 +68,8 @@ v2.1 decisions:
 - [Phase 25-catalog-enrichment-agent-tools]: unique(brand, model) constraint on globalItems: enables safe ON CONFLICT DO UPDATE for catalog enrichment agents
 - [Phase 25-catalog-enrichment-agent-tools]: Catalog MCP tools use registerCatalogTools(db) without userId — shared catalog needs no user scoping
 - [Phase 25-catalog-enrichment-agent-tools]: Attribution spacing: image div removes mb-6, attribution paragraph takes mb-6, fallback div ensures consistent spacing
+- [Phase 26-discovery-landing-page]: Composite cursor for setups uses itemCount_id format filtered post-query in JS for simplicity with grouped SQL
+- [Phase 26-discovery-landing-page]: No cursor pagination for getTrendingCategories — bounded small list, simple limit is sufficient
 
 ### Pending Todos
 
@@ -79,6 +81,6 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-04-10T12:33:01.473Z
-Stopped at: Phase 26 context gathered
-Resume file: .planning/phases/26-discovery-landing-page/26-CONTEXT.md
+Last session: 2026-04-10T12:55:01.406Z
+Stopped at: Completed 26-01-PLAN.md
+Resume file: None