Add OKX hedge-plan P0: env group, preview page, and PnL scenario math.

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

lib/instance/instance_display_prefs_lib.py

@@ -15,6 +15,7 @@ DEFAULT_INSTANCE_DISPLAY: dict[str, bool] = {
     "show_nav_risk_policy": True,
     "show_nav_env_config": True,
     "show_nav_options": True,
+    "show_nav_hedge_plan": True,
     "show_settings_transfer": True,
     "show_settings_export": True,
     "show_settings_password": True,
@@ -30,6 +31,7 @@ DISPLAY_LABELS: dict[str, str] = {
     "show_nav_risk_policy": "风控说明",
     "show_nav_env_config": "env配置",
     "show_nav_options": "期权",
+    "show_nav_hedge_plan": "对冲计划",
     "show_settings_transfer": "资金划转",
     "show_settings_export": "数据导出",
     "show_settings_password": "账户密码修改",
@@ -45,6 +47,7 @@ NAV_TAB_ALLOWED: dict[str, str] = {
     "risk_policy": "show_nav_risk_policy",
     "env_config": "show_nav_env_config",
     "options": "show_nav_options",
+    "hedge_plan": "show_nav_hedge_plan",
 }
 
 
@@ -104,6 +107,7 @@ def display_meta_for_ui() -> list[dict[str, Any]]:
         "show_nav_risk_policy",
         "show_nav_env_config",
         "show_nav_options",
+        "show_nav_hedge_plan",
     ]
     settings_keys = [
         "show_settings_transfer",