docs(01): create phase plan

.planning/STATE.md

@@ -2,9 +2,9 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: planning
+status: executing
 stopped_at: Phase 1 context gathered
-last_updated: "2026-06-18T07:14:00.944Z"
+last_updated: "2026-06-18T07:40:09.403Z"
 last_activity: 2026-06-18 -- Roadmap created
 progress:
   total_phases: 6
@@ -27,7 +27,7 @@ See: .planning/PROJECT.md (updated 2026-06-18)
 
 Phase: 1 of 6 (Foundation & Portal Shell)
 Plan: 0 of TBD in current phase
-Status: Ready to plan
+Status: Ready to execute
 Last activity: 2026-06-18 -- Roadmap created
 
 Progress: [░░░░░░░░░░] 0%