docs(02): cite D-12, D-16, D-32 in plan must_haves + record planning complete

Decision-coverage gate found three CONTEXT.md decisions structurally
implemented but not literally cited by their D-NN tags. Added one-line
must_haves entries citing each:

- D-12 (Lura as discrete gate visits, 3 beats this Season) → 02-04
- D-16 (all Lura dialogue authored in Ink, runtime via inkjs) → 02-04
- D-32 (Zustand 5 store as the Phaser↔React bridge; sim never imports
  store, CORE-10 enforced) → 02-01

STATE.md flipped from in_progress (context gathered) to ready_to_execute
with the planning summary in stopped_at.

All 24 REQ-IDs + 34 D-XX decisions now covered.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.planning/STATE.md

@@ -2,9 +2,9 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: in_progress
-stopped_at: "Phase 2 context gathered. 02-CONTEXT.md captures 34 implementation decisions across 8 gray areas (geometry, time density, Lura's arc, letter composition, begin screen, journal, plant placeholders, settings UI scope). Locked: 4×4 grid, click+inline seed picker, 2–3 plants (1-from-start + fragment-count unlocks), infinite seeds, 2–5min growth band per plant, auto-harvest offline / manual active, 3 Lura gate visits gated by 1st/4th/8th harvest, authored Ink letter skeleton + slots, full-screen letter ≥5min absence, tasteful placeholder Begin (skip-on-return), full-screen Journal modal revealing after 1st harvest, Phaser-primitive plants with glow/pulse ready cue, save-management-only Settings. Phase 2's first commits: BigQty wrapper, Zustand store, tick scheduler. Save schema is a v1 *extension*, not a v1→v2 migration. Next: /gsd-plan-phase 2."
-last_updated: "2026-05-09T00:50:00.000Z"
+status: ready_to_execute
+stopped_at: "Phase 2 planned. 5 PLAN.md files across 3 waves (Wave 0: 02-01 foundations [BigQty + Zustand store + tick scheduler + V1Payload extension]; Wave 1 parallel: 02-02 begin-plant-grow + 02-03 harvest-journal-fragments; Wave 2 parallel: 02-04 lura-gate-beats + 02-05 letter-settings-e2e). 24/24 REQ-IDs covered in plan frontmatter; 34/34 CONTEXT.md decisions cited across plan must_haves. RESEARCH.md, PATTERNS.md, VALIDATION.md (nyquist_compliant: true) all in place. Plan-checker iterations: 13 issues → 3 issues → 0 issues (BLOCKER 3 lastTickAt-vs-tickCount split was the cross-plan defect; final fix introduced src/save/payload.ts as a shared two-arg helper module). Next: /gsd-execute-phase 2 (Wave 0 must land before Waves 1+2 can start)."
+last_updated: "2026-05-09T01:30:00.000Z"
 last_activity: 2026-05-09
 progress:
   total_phases: 8
@@ -21,14 +21,14 @@ progress:
 See: .planning/PROJECT.md (updated 2026-05-08)
 
 **Core value:** Every idle mechanic must function as a metaphor that the player absorbs without being told. When economy and meaning conflict, meaning wins.
-**Current focus:** Phase 02 — Season 1 Vertical Slice (Soil) — context gathered; ready for `/gsd-plan-phase 2`
+**Current focus:** Phase 02 — Season 1 Vertical Slice (Soil) — 5 plans ready; ready for `/gsd-execute-phase 2`
 
 ## Current Position
 
-Phase: 02 (season-1-vertical-slice-soil) — context gathered
-Plans: 0 of TBD (planning is the next step)
-Status: 02-CONTEXT.md written with 34 decisions; ready for `/gsd-plan-phase 2`
-Last activity: 2026-05-09 -- Phase 2 discuss-phase complete
+Phase: 02 (season-1-vertical-slice-soil) — planned, ready to execute
+Plans: 5 of 5 created (3 waves)
+Status: All 24 REQ-IDs + 34 CONTEXT.md decisions covered. Plan-checker PASSED after 3 revision iterations. Ready for `/gsd-execute-phase 2`.
+Last activity: 2026-05-09 -- Phase 2 plan-phase complete
 
 Progress: [█░░░░░░░░░] 12%
 
@@ -117,5 +117,5 @@ Items acknowledged and carried forward:
 ## Session Continuity
 
 Last session: 2026-05-09
-Stopped at: Phase 2 context gathered — 02-CONTEXT.md and 02-DISCUSSION-LOG.md written, 8 gray areas discussed, 34 decisions captured. Phase 1 still verified complete; Phase 2 builds on its save layer + content pipeline + ESLint firewall + doctrine docs.
-Next action: `/gsd-plan-phase 2` to plan the Season 1 Vertical Slice
+Stopped at: Phase 2 planning complete — 5 PLAN.md files written across 3 waves; plan-checker PASSED after 3 revision iterations (13 issues → 3 → 0); all 24 REQ-IDs and 34 D-XX decisions covered.
+Next action: `/gsd-execute-phase 2` to execute the Season 1 Vertical Slice (Wave 0 first; Waves 1+2 can run in parallel within their wave)