feat: add OKX options module with dual API, USDT/USDC convert, and docs

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

lib/instance/instance_settings_lib.py

@@ -135,6 +135,27 @@ def build_instance_settings_view(
             }
         )
 
+    if (exchange_key or "").strip().lower() == "okx" and _env_bool("OKX_OPTIONS_ENABLED", False):
+        opt_key = (os.getenv("OKX_OPTIONS_API_KEY") or "").strip()
+        sections.append(
+            {
+                "title": "期权账户（主账户）",
+                "rows": [
+                    _row("期权模块", "已启用"),
+                    _row(
+                        "期权 API",
+                        f"已配置（…{opt_key[-4:]}）" if len(opt_key) >= 4 else "未配置",
+                    ),
+                    _row("单笔权利金上限", f"{_env_float('OKX_OPTIONS_TRADE_BUDGET_USDC', 10):g} USDC"),
+                    _row(
+                        "资金说明",
+                        "资金账户 USDT 兑换 USDC 后划转到交易账户",
+                        "期权页操作；与永续子账户资金分开",
+                    ),
+                ],
+            }
+        )
+
     policy_note = ""
     if trade_policy and getattr(trade_policy, "badge_text", ""):
         policy_note = str(trade_policy.badge_text)