Split exchange and strategy modules for future Binance support.

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

.env.example

@@ -4,6 +4,8 @@
 MODE=SIM
 ENV_NAME=test
 TZ=Asia/Shanghai
+# 交易所模块：okx（已接入）| binance（占位）
+EXCHANGE=okx
 
 # HTTP（前后端同端口，默认 5155）
 API_HOST=0.0.0.0
@@ -30,10 +32,10 @@ INDEX_INST_ID=ETH-USD
 
 FEE_RATE=0.0005
 INITIAL_EQUITY=100000
-MAX_ROUNDS=3
-OPEN_HHMM=16:00
-STOP_OPEN_HHMM=08:00
-EXIT_MOVE_POINTS=30
+LEVERAGE=3
+MIN_OPTION_HOURS=12
+MIN_OPTION_LEVERAGE=100
+EXIT_MOVE_PCT=2
 REST_SECONDS=300
 PERP_QTY_ETH=1
 OPTION_QTY_ETH=2