Initial eth_hedge_sim: P0 market, auth UI, one-click deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/config.py

@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=(".env", "../.env"),
+        env_file_encoding="utf-8",
+        extra="ignore",
+    )
+
+    mode: str = "SIM"
+    tz: str = "Asia/Shanghai"
+    env_name: str = "test"  # test / prod
+
+    api_host: str = "0.0.0.0"
+    api_port: int = 5155
+
+    # Web 登录（仅本机 .env，勿提交真密码）
+    auth_username: str = "admin"
+    auth_password: str = "admin123"
+    auth_secret: str = "change-me-eth-hedge-sim-secret"
+    auth_token_ttl_sec: int = 60 * 60 * 24 * 7
+
+    okx_api_key: str = ""
+    okx_api_secret: str = ""
+    okx_api_passphrase: str = ""
+    okx_rest_base: str = "https://www.okx.com"
+    okx_ws_public: str = "wss://ws.okx.com:8443/ws/v5/public"
+    okx_http_proxy: str = ""
+
+    perp_inst_id: str = "ETH-USDT-SWAP"
+    option_inst_family: str = "ETH-USD_UM"
+    index_inst_id: str = "ETH-USD"
+
+    fee_rate: float = 0.0005
+    initial_equity: float = 100_000.0
+    max_rounds: int = 3
+    open_hhmm: str = "16:00"
+    stop_open_hhmm: str = "08:00"
+
+    @property
+    def is_sim(self) -> bool:
+        return self.mode.strip().upper() != "LIVE"
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()