Merge OKX dual APIs into one OKX_API_* account for perp and options.

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

lib/instance/instance_embed_context_lib.py

@@ -104,12 +104,14 @@ def options_funding_label(
     funding_usdc: float | None,
     funding_usdt: float | None = None,
 ) -> str:
-    parts: list[str] = []
-    if funding_usdc is not None and float(funding_usdc) > 0:
-        parts.append(f"{float(funding_usdc):.2f} USDC")
-    if funding_usdt is not None and float(funding_usdt) > 0:
-        parts.append(f"{float(funding_usdt):.2f} USDT")
-    return " · ".join(parts) if parts else "—"
+    """期权侧顶栏仅展示 USDC(USDT 归永续资金/交易账户).funding_usdt 参数保留兼容,忽略."""
+    _ = funding_usdt
+    if funding_usdc is None:
+        return "—"
+    try:
+        return f"{float(funding_usdc):.2f} USDC"
+    except (TypeError, ValueError):
+        return "—"
 
 
 def total_funds_usdt(