Add SNS Marketing Campaign feature

- Add cash_cc_balance to User model (withdrawable CC)
- Create SnsShareSubmission model for SNS share verification
- Add marketing campaign settings to SystemSettings
- Add reward_type to ReferralReward model
- Create /api/sns-share endpoints for submission and verification
- Add referral signup reward logic (10CC on signup)
- Create /sns-share user page for SNS sharing
- Create /admin/sns-shares management page
- Add marketing settings UI to admin settings page
- Add SNS Shares menu to admin sidebar

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

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

backend/app/schemas/__init__.py

@@ -47,6 +47,10 @@ from .notification import (
     NotificationCreate, NotificationResponse,
     NotificationListResponse, NotificationMarkRead,
 )
+from .sns_share import (
+    SnsShareSubmit, SnsShareResponse, SnsShareListResponse,
+    SnsShareVerify, SnsShareStats,
+)
 
 __all__ = [
     "CarMakerCreate", "CarMakerResponse",
@@ -78,4 +82,6 @@ __all__ = [
     "ReferralSettingsResponse", "ReferralSettingsUpdate",
     "NotificationCreate", "NotificationResponse",
     "NotificationListResponse", "NotificationMarkRead",
+    "SnsShareSubmit", "SnsShareResponse", "SnsShareListResponse",
+    "SnsShareVerify", "SnsShareStats",
 ]

backend/app/schemas/settings.py

@@ -22,6 +22,16 @@ class SystemSettingsUpdate(BaseModel):
     referral_reward_percent: Optional[float] = None
     referral_reward_type: Optional[str] = None
 
+    # 마케팅 캠페인 설정
+    marketing_enabled: Optional[bool] = None
+    marketing_start_date: Optional[datetime] = None
+    marketing_end_date: Optional[datetime] = None
+    sns_share_reward_cc: Optional[float] = None
+    referral_signup_reward_cc: Optional[float] = None
+    event_cc_validity_months: Optional[int] = None
+    withdrawal_enabled: Optional[bool] = None
+    min_withdrawal_usd: Optional[float] = None
+
 
 class SystemSettingsResponse(BaseModel):
     """시스템 설정 응답 스키마"""
@@ -42,6 +52,17 @@ class SystemSettingsResponse(BaseModel):
     referral_reward_enabled: bool = True
     referral_reward_percent: float = 10.0
     referral_reward_type: str = "one_time"
+
+    # 마케팅 캠페인 설정
+    marketing_enabled: bool = False
+    marketing_start_date: Optional[datetime] = None
+    marketing_end_date: Optional[datetime] = None
+    sns_share_reward_cc: float = 3.0
+    referral_signup_reward_cc: float = 10.0
+    event_cc_validity_months: int = 6
+    withdrawal_enabled: bool = True
+    min_withdrawal_usd: float = 10.0
+
     created_at: Optional[datetime] = None
     updated_at: Optional[datetime] = None
 

backend/app/schemas/sns_share.py

@@ -0,0 +1,57 @@
+from pydantic import BaseModel, HttpUrl
+from typing import Optional, List
+from datetime import datetime
+
+
+class SnsShareSubmit(BaseModel):
+    """SNS 공유 제출 요청"""
+    car_id: int
+    platform: str  # twitter, instagram, facebook
+    sns_url: str  # 공유 게시물 URL
+
+
+class SnsShareResponse(BaseModel):
+    """SNS 공유 제출 응답"""
+    id: int
+    user_id: int
+    car_id: int
+    platform: str
+    sns_url: str
+    status: str
+    rejected_reason: Optional[str] = None
+    reward_cc: float
+    rewarded_at: Optional[datetime] = None
+    submitted_at: datetime
+    verified_at: Optional[datetime] = None
+    verified_by: Optional[int] = None
+
+    # Car info for display
+    car_name: Optional[str] = None
+    car_image: Optional[str] = None
+
+    class Config:
+        from_attributes = True
+
+
+class SnsShareListResponse(BaseModel):
+    """SNS 공유 목록 응답"""
+    submissions: List[SnsShareResponse]
+    total: int
+    pending_count: int
+    approved_count: int
+    rejected_count: int
+
+
+class SnsShareVerify(BaseModel):
+    """관리자 검증 요청"""
+    approved: bool
+    rejected_reason: Optional[str] = None
+
+
+class SnsShareStats(BaseModel):
+    """SNS 공유 통계"""
+    total_submissions: int
+    pending_submissions: int
+    approved_submissions: int
+    rejected_submissions: int
+    total_rewarded_cc: float