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

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

tests/test_instance_display_env_settings.py

@@ -112,6 +112,9 @@ class TestEnvSchema(unittest.TestCase):
         self.assertEqual(by_key["OKX_SHOW_PERP_FUNDS"]["label"], "显示永续资金")
         self.assertEqual(by_key["OKX_SHOW_PERP_FUNDS"]["type"], "bool")
         self.assertTrue(by_key["OKX_SHOW_PERP_FUNDS"].get("hot_reload"))
+        self.assertNotIn("OKX_OPTIONS_API_KEY", by_key)
+        self.assertNotIn("OKX_SUB_ACCOUNT_NAME", by_key)
+        self.assertEqual(by_key["OKX_API_KEY"]["note"], "账户 API(永续+期权共用)")
 
         groups_v = [{"title": "t", "fields": [by_key["TRADE_DIRECTION"]]}]
         clean, errors = validate_env_updates(groups_v, {"TRADE_DIRECTION": "long_only"})
@@ -137,6 +140,13 @@ class TestShowPerpFunds(unittest.TestCase):
             else:
                 os.environ["OKX_SHOW_PERP_FUNDS"] = old
 
+    def test_options_funding_label_usdc_only(self):
+        from lib.instance.instance_embed_context_lib import options_funding_label
+
+        self.assertEqual(options_funding_label(12.5, 99.0), "12.50 USDC")
+        self.assertEqual(options_funding_label(0.0, 50.0), "0.00 USDC")
+        self.assertEqual(options_funding_label(None, 10.0), "—")
+
 
 if __name__ == "__main__":
     unittest.main()