fix: naprawiono crash przy składaniu zamówienia z kuponem rabatowym

Fatal Error: Call to undefined method stdClass::is_one_time() w OrderRepository:793.
Zamieniono wywołania nieistniejących metod na stdClass na dostęp do właściwości
+ istniejącą metodę CouponRepository::markAsUsed().

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

.paul/STATE.md

@@ -5,54 +5,52 @@
 See: .paul/PROJECT.md (updated 2026-03-12)
 
 **Core value:** Właściciel sklepu ma pełną kontrolę nad sprzedażą online w jednym systemie pisanym od podstaw, bez narzutów zewnętrznych platform.
-**Current focus:** Projekt zainicjalizowany — gotowy do planowania
+**Current focus:** Hotfix coupon crash — COMPLETE
 
 ## Current Position
 
-Milestone: Tech debt — Integrations refactoring
-Phase: 6 of ? — IntegrationsRepository split — Complete
-Plan: 06-02 complete (phase done)
-Status: UNIFY complete, phase 6 finished
-Last activity: 2026-03-12 — 06-02 UNIFY complete
-
-Note: Previous milestone (Security hardening) — fazy 4 i 5 UNIFY zakończone.
-Milestone Security hardening: COMPLETE.
+Milestone: Hotfix — coupon order crash
+Phase: 7 — Fix coupon stdClass method call crash — Complete
+Plan: 07-01 complete (phase done)
+Status: UNIFY complete, phase 7 finished
+Last activity: 2026-03-15 — 07-01 UNIFY complete
 
 Progress:
-- Milestone (Security hardening): [██████████] 100% (COMPLETE)
-- Phase 6: [██████████] 100% (complete)
+- Phase 7: [██████████] 100% (COMPLETE)
 
 ## Loop Position
 
-Current loop state (phase 6, plan 02):
+Current loop state (phase 7, plan 01):
 ```
 PLAN ──▶ APPLY ──▶ UNIFY
-  ✓        ✓        ✓     [Phase 6 complete]
+  ✓        ✓        ✓     [Phase 7 complete]
 ```
 
-Deferred (previous milestone — now closed):
+Previous phases:
 ```
 Phase 4: PLAN ──▶ APPLY ──▶ UNIFY  ✓ ✓ ✓  [COMPLETE — 2026-03-12]
 Phase 5: PLAN ──▶ APPLY ──▶ UNIFY  ✓ ✓ ✓  [COMPLETE — 2026-03-12]
+Phase 6: PLAN ──▶ APPLY ──▶ UNIFY  ✓ ✓ ✓  [COMPLETE — 2026-03-12]
+Phase 7: PLAN ──▶ APPLY ──▶ UNIFY  ✓ ✓ ✓  [COMPLETE — 2026-03-15]
 ```
 
 ## Accumulated Context
 
 ### Decisions
-None yet.
+- Use existing `CouponRepository::markAsUsed()` instead of adding methods to stdClass
 
 ### Deferred Issues
-None yet.
+None.
 
 ### Blockers/Concerns
-None yet.
+None.
 
 ## Session Continuity
 
-Last session: 2026-03-12
-Stopped at: Phase 04 UNIFY complete — wszystkie odroczone pętle zamknięte
-Next action: /paul:progress — wybierz kolejny task lub milestone
-Resume file: .paul/phases/04-csrf-protection/04-01-SUMMARY.md
+Last session: 2026-03-15
+Stopped at: Phase 07 UNIFY complete — hotfix loop closed
+Next action: Deploy fix to production, then /paul:progress for next work
+Resume file: .paul/phases/07-coupon-bugfix/07-01-SUMMARY.md
 
 ---
 *STATE.md — Updated after every significant action*