docs(04-01): complete database thread categoryId plan

- SUMMARY.md documents 2 tasks, 1 deviation (test fixes)
- STATE.md advanced to plan 1/2 in phase 4
- ROADMAP.md marks 04-01 complete
- REQUIREMENTS.md marks DB-01 and PLAN-01 complete

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/STATE.md

@@ -2,16 +2,16 @@
 gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Fixes & Polish
-status: planning
-stopped_at: Phase 4 context gathered
-last_updated: "2026-03-15T15:22:37.514Z"
-last_activity: 2026-03-15 -- v1.1 roadmap created
+status: executing
+stopped_at: Completed 04-01-PLAN.md
+last_updated: "2026-03-15T15:32:00Z"
+last_activity: 2026-03-15 -- Completed 04-01 database thread categoryId fix
 progress:
   total_phases: 3
   completed_phases: 0
-  total_plans: 0
-  completed_plans: 0
-  percent: 0
+  total_plans: 2
+  completed_plans: 1
+  percent: 17
 ---
 
 # Project State
@@ -26,11 +26,11 @@ See: .planning/PROJECT.md (updated 2026-03-15)
 ## Current Position
 
 Phase: 4 of 6 (Database & Planning Fixes)
-Plan: 0 of ? in current phase
-Status: Ready to plan
-Last activity: 2026-03-15 -- v1.1 roadmap created
+Plan: 1 of 2 in current phase
+Status: Executing
+Last activity: 2026-03-15 -- Completed 04-01 database thread categoryId fix
 
-Progress: [░░░░░░░░░░] 0% (v1.1 phases)
+Progress: [█░░░░░░░░░] 17% (v1.1 phases)
 
 ## Accumulated Context
 
@@ -38,6 +38,7 @@ Progress: [░░░░░░░░░░] 0% (v1.1 phases)
 
 - Stay with SQLite -- single-user app, Postgres adds unnecessary complexity
 - Lucide Icons for category icons -- best outdoor/gear coverage
+- categoryId on threads is NOT NULL with FK to categories -- every thread belongs to a category
 
 ### Pending Todos
 
@@ -51,6 +52,6 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-03-15T15:22:37.512Z
-Stopped at: Phase 4 context gathered
-Resume file: .planning/phases/04-database-planning-fixes/04-CONTEXT.md
+Last session: 2026-03-15T15:32:00Z
+Stopped at: Completed 04-01-PLAN.md
+Resume file: .planning/phases/04-database-planning-fixes/04-02-PLAN.md