Add configurable CC cost for banner vehicle PDF/description view

- Add cc_per_banner_view setting to system_settings (default 0.1 CC)
- Update car detail page to use dynamic CC value from settings
- Add CC per Banner View field in admin settings page
- Replace hardcoded 0.1 CC with configurable value

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/api/cc.py

@@ -146,7 +146,12 @@ def check_car_view(
     }
 
 
-PERFORMANCE_CHECK_COST = 0.1  # 0.1 CC for performance check view
+def get_performance_check_cost(db: Session) -> float:
+    """Get performance check cost from system settings"""
+    system_settings = db.query(SystemSettings).first()
+    if system_settings and system_settings.cc_per_banner_view is not None:
+        return system_settings.cc_per_banner_view
+    return 0.1  # Default fallback
 
 
 @router.post("/purchase-performance-check")
@@ -155,8 +160,9 @@ async def purchase_performance_check_view(
     current_user: User = Depends(get_current_user),
     db: Session = Depends(get_db)
 ):
-    """Purchase access to view performance check (costs 0.1 CC)"""
+    """Purchase access to view performance check (costs CC based on system settings)"""
     car_id = request.car_id
+    PERFORMANCE_CHECK_COST = get_performance_check_cost(db)
 
     # Check if car exists
     car = db.query(Car).filter(Car.id == car_id).first()

backend/app/api/settings.py

@@ -26,6 +26,7 @@ def get_or_create_settings(db: Session) -> SystemSettings:
             cc_per_usdc=1,  # 1 USD = 1 CC
             cc_per_view=1,  # 차량 상세 조회 시 1 CC
             cars_per_cc=3,  # 1 CC = 3 recommended vehicles per request
+            cc_per_banner_view=0.1,  # 배너 차량 PDF/상세 보기 비용
             cc_signup_bonus=3,  # 3 CC free on signup
             cache_ttl_hours=2,
             container_logistics_usd=3600,

backend/app/models/settings.py

@@ -21,6 +21,7 @@ class SystemSettings(Base):
     cc_per_view = Column(Integer, default=1)   # 차량 상세 조회 시 1 CC
     cc_signup_bonus = Column(Integer, default=3)  # 신규 가입 시 3 CC
     cars_per_cc = Column(Integer, default=3)  # 1 CC당 추천 차량 수 (기본 3대)
+    cc_per_banner_view = Column(Float, default=0.1)  # 배너 차량 PDF/상세 보기 비용 (기본 0.1 CC)
 
     # 캐시 TTL (시간)
     cache_ttl_hours = Column(Integer, default=2)

backend/app/schemas/settings.py

@@ -12,6 +12,7 @@ class SystemSettingsUpdate(BaseModel):
     cc_per_view: Optional[int] = None
     cc_signup_bonus: Optional[int] = None
     cars_per_cc: Optional[int] = None
+    cc_per_banner_view: Optional[float] = None
     cache_ttl_hours: Optional[int] = None
     container_logistics_usd: Optional[int] = None
     shoring_cost_usd: Optional[int] = None
@@ -32,6 +33,7 @@ class SystemSettingsResponse(BaseModel):
     cc_per_view: int
     cc_signup_bonus: int
     cars_per_cc: int
+    cc_per_banner_view: float = 0.1
     cache_ttl_hours: int
     container_logistics_usd: int
     shoring_cost_usd: int