Initial commit: TradeMate 外贸小助手 MVP

项目结构:
- backend/     Python FastAPI 后端
- uni-app/     uni-app跨端前端
- docs/        设计文档
- docker-compose.yml  Docker编排
- nginx/scripts/systemd 运维配置

已完成功能:
- 用户认证 (JWT)
- 智能翻译 + 回复建议
- 营销素材生成
- 客户管理 + 沉默检测
- 报价单管理
- 产品库管理
- 汇率换算
- 推送通知 (uni-push)
- WhatsApp Webhook框架
- Celery定时任务

backend/app/config.py

@@ -0,0 +1,73 @@
+from pydantic_settings import BaseSettings
+from typing import Optional
+from pathlib import Path
+
+
+PROJECT_ROOT = Path(__file__).resolve().parents[2]
+ENV_FILE = PROJECT_ROOT / ".env"
+
+
+class Settings(BaseSettings):
+    model_config = {"env_file": str(ENV_FILE), "extra": "ignore"}
+
+    APP_NAME: str = "TradeMate"
+
+    SECRET_KEY: str
+    JWT_ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60
+    REFRESH_TOKEN_EXPIRE_DAYS: int = 30
+
+    DATABASE_URL: str
+    DB_ECHO: bool = False
+
+    REDIS_URL: str = "redis://localhost:6379/0"
+
+    CELERY_BROKER_URL: str = "redis://localhost:6379/1"
+    CELERY_RESULT_BACKEND: str = "redis://localhost:6379/2"
+
+    OPENAI_API_KEY: Optional[str] = None
+    ANTHROPIC_API_KEY: Optional[str] = None
+    DEEPL_API_KEY: Optional[str] = None
+
+    LOCAL_MODEL_ENABLED: bool = False
+    LOCAL_MODEL_URL: str = "http://localhost:8001"
+
+    WHATSAPP_API_TOKEN: Optional[str] = None
+    WHATSAPP_PHONE_NUMBER_ID: Optional[str] = None
+    WHATSAPP_WEBHOOK_VERIFY_TOKEN: Optional[str] = None
+
+    WECHAT_APP_ID: Optional[str] = None
+    WECHAT_APP_SECRET: Optional[str] = None
+
+    EXCHANGE_RATE_API_KEY: Optional[str] = None
+
+    UPLOAD_DIR: str = "./uploads"
+    MAX_UPLOAD_SIZE: int = 10 * 1024 * 1024
+
+    FRONTEND_URL: str = "http://localhost:3000"
+    BACKEND_URL: str = "http://localhost:8000"
+
+    AI_ROUTING: dict = {
+        "translate": {"primary": "deepl", "fallback": ["openai", "local"]},
+        "reply": {"primary": "openai", "fallback": ["anthropic", "local"]},
+        "marketing": {"primary": "anthropic", "fallback": ["openai", "local"]},
+        "extract": {"primary": "openai", "fallback": ["anthropic"]},
+        "quotation": {"primary": "openai", "fallback": ["anthropic"]},
+    }
+
+    FREE_DAILY_TRANSLATE_CHARS: int = 5000
+    FREE_DAILY_REPLIES: int = 20
+    FREE_DAILY_MARKETING: int = 5
+    FREE_MAX_CUSTOMERS: int = 5
+    FREE_MAX_PRODUCTS: int = 1
+    FREE_DAILY_QUOTATIONS: int = 3
+
+    PRO_DAILY_TRANSLATE_CHARS: int = 50000
+    PRO_DAILY_REPLIES: int = 200
+    PRO_DAILY_MARKETING: int = 50
+    PRO_MAX_CUSTOMERS: int = 100
+    PRO_MAX_PRODUCTS: int = 20
+    PRO_DAILY_QUOTATIONS: int = 30
+
+
+settings = Settings()