feat: instance system settings page with risk docs, export and transfer

顶栏新增系统设置；风控说明读取 .env；数据导出与资金划转迁入三张卡片；顶栏移除导出条与手动划转。

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

tests/test_instance_settings_lib.py

@@ -0,0 +1,43 @@
+"""instance_settings_lib 单元测试。"""
+from __future__ import annotations
+
+import os
+import unittest
+
+from lib.instance.instance_settings_lib import build_instance_settings_view
+
+
+class InstanceSettingsLibTest(unittest.TestCase):
+    def test_build_settings_view_sections(self):
+        view = build_instance_settings_view(
+            exchange_key="gate",
+            exchange_display="Gate.io",
+            risk_status={"status_label": "正常", "can_trade": True},
+            data_export_version=3,
+        )
+        titles = [s["title"] for s in view["sections"]]
+        self.assertIn("交易执行", titles)
+        self.assertIn("账户冷静期", titles)
+        self.assertEqual(view["data_export_version"], 3)
+        self.assertTrue(view["show_transfer"])
+
+    def test_force_close_section_when_enabled(self):
+        old = os.environ.get("FORCE_CLOSE_ENABLED")
+        try:
+            os.environ["FORCE_CLOSE_ENABLED"] = "true"
+            view = build_instance_settings_view(
+                exchange_key="gate",
+                exchange_display="Gate.io",
+                risk_status={},
+            )
+            titles = [s["title"] for s in view["sections"]]
+            self.assertIn("整点强制清仓", titles)
+        finally:
+            if old is None:
+                os.environ.pop("FORCE_CLOSE_ENABLED", None)
+            else:
+                os.environ["FORCE_CLOSE_ENABLED"] = old
+
+
+if __name__ == "__main__":
+    unittest.main()