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/phases/07-coupon-bugfix/07-01-SUMMARY.md

@@ -0,0 +1,92 @@
+---
+phase: 07-coupon-bugfix
+plan: 01
+subsystem: order
+tags: [coupon, order, bugfix, stdClass]
+
+requires:
+  - phase: none
+    provides: none
+provides:
+  - Fixed coupon handling in order creation flow
+affects: []
+
+tech-stack:
+  added: []
+  patterns: []
+
+key-files:
+  created: []
+  modified: [autoload/Domain/Order/OrderRepository.php]
+
+key-decisions:
+  - "Use existing CouponRepository::markAsUsed() instead of adding methods to stdClass"
+
+patterns-established: []
+
+duration: 5min
+started: 2026-03-15T13:55:00Z
+completed: 2026-03-15T14:00:00Z
+---
+
+# Phase 7 Plan 01: Fix coupon stdClass method call crash — Summary
+
+**Fixed Fatal Error in order placement with coupon codes by replacing undefined stdClass method calls with property access + existing CouponRepository::markAsUsed()**
+
+## Performance
+
+| Metric | Value |
+|--------|-------|
+| Duration | ~5min |
+| Tasks | 1 completed |
+| Files modified | 1 |
+
+## Acceptance Criteria Results
+
+| Criterion | Status | Notes |
+|-----------|--------|-------|
+| AC-1: Orders with coupon codes complete without Fatal Error | Pass | Undefined method calls replaced with property access |
+| AC-2: One-time coupons marked as used after order | Pass | Uses existing CouponRepository::markAsUsed() |
+| AC-3: Non-one-time coupons NOT marked as used | Pass | Condition checks `(int)$coupon->one_time === 1` |
+| AC-4: Existing tests pass | Pass | 818 tests, 2275 assertions — all green |
+
+## Accomplishments
+
+- Fixed critical production crash preventing all coupon-based orders
+- 2-line fix using existing infrastructure (no new code needed)
+
+## Files Created/Modified
+
+| File | Change | Purpose |
+|------|--------|---------|
+| `autoload/Domain/Order/OrderRepository.php` | Modified (lines 793-795) | Replace `$coupon->is_one_time()` / `$coupon->set_as_used()` with property access + CouponRepository call |
+
+## Decisions Made
+
+| Decision | Rationale | Impact |
+|----------|-----------|--------|
+| Use `CouponRepository::markAsUsed()` | Method already exists (line 235), consistent with `incrementUsedCount()` usage on line 722 | No new code, proven pattern |
+
+## Deviations from Plan
+
+None — plan executed exactly as written.
+
+## Issues Encountered
+
+None.
+
+## Next Phase Readiness
+
+**Ready:**
+- Coupon order flow restored to working state
+- Fix ready for deployment to production
+
+**Concerns:**
+- None
+
+**Blockers:**
+- None
+
+---
+*Phase: 07-coupon-bugfix, Plan: 01*
+*Completed: 2026-03-15*