feat: add MMGame backend and frontend source code

backend/app/config.py

@@ -0,0 +1,21 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    DATABASE_URL: str = "sqlite+aiosqlite:///./mmgame.db"
+    SECRET_KEY: str = "mmgame-dev-secret-key-change-in-production"
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 7
+
+    AI_BACKEND: str = "rule"
+    DEEPSEEK_API_KEY: str = ""
+    DEEPSEEK_BASE_URL: str = "https://api.deepseek.com"
+    DEEPSEEK_MODEL: str = "deepseek-chat"
+    OLLAMA_BASE_URL: str = "http://localhost:11434"
+    OLLAMA_MODEL: str = "qwen2.5:7b"
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()